Developer Tools
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Compiler and LLVM -
What's New in LLVM
The Apple LLVM compiler in Xcode 9 has new language features, improved diagnostics, and more powerful optimizations. Keep up with the newest additions to Objective-C and C++, get an overview of new and improved warnings and static analyzer checks, and learn about how the LLVM compiler technology...
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Advanced NSOperations
Operations are a flexible way to model your app's business logic, but they can do so much more. See how NSOperation forms the heart of the WWDC app, and how using features like dependencies, readiness, and composition allow you to quickly and easily build dynamic and complex apps.
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What's New in LLVM
The Apple LLVM compiler continues to evolve, with support for 64-bit iOS products, powerful new optimizations, and other new features. Learn about some of the advanced technology that the compiler uses to increase the performance of your code, and get details on how to take advantage of the...
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Debugging -
Build Better Apps with CloudKit Dashboard
The CloudKit Dashboard has been completely overhauled to aid you throughout your development lifecycle of building, testing, operating, and supporting your CloudKit-backed applications. See the new functionality, including fetching changes and modifying sharing relationships right from the...
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Unified Logging and Activity Tracing
The new Unified Logging and Tracing System for iOS and macOS uses Activity Tracing for performance, consolidates kernel and user-space logging, and has many other improvements. Learn how Logging and Tracing can help you debug and troubleshoot issues with your apps.
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Debugging Tips and Tricks
Spend an hour with the team responsible for the technology behind Xcode's debugger: LLDB. Find out what's new, what's been there all along that you didn't know about, and how best to take advantage of it all. This session will cover a range of topics with tips for both newcomers and experienced...
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What's New in LLDB
Enhancements to LLDB simplify life for Swift and Objective-C developers alike. Experienced developers will find new powers within the debugging console, and learn more about the connection between the debugger and Swift REPL. Newcomers will get insight into the range of possibilities hidden...
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Sharing code between iOS and OS X
Learn what the iWork engineers did to ship iWork for iOS and Mac from a single codebase. Explore the patterns for sharing code between desktop and mobile, and see how you can optimize your code and write great apps.
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Interface Builder -
What's New in Cocoa for macOS
Gain insights into the latest in Cocoa frameworks for macOS. Hear about Dark Mode, control tinting, contextual workflows for Touch Bar and Finder, and other improvements in AppKit, Foundation, and related areas. Get an overview and guide to the sessions that we have this year covering...
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Introducing Dark Mode
Hear from the Apple design team about the principles and concepts that anchor Dark Mode. Learn the basics of enhancing your app with this new appearance, and add an experience that people are sure to love.
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Touch Bar Fundamentals
Touch Bar replaces the function keys that have long occupied the top of your keyboard with a versatile MultiTouch input device that features a Retina display. AppKit provides powerful APIs to let you easily leverage the power of Touch Bar in your applications. Learn how to use Touch Bar in your...
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Mysteries of Auto Layout, Part 2
Continue your pursuit of Auto Layout mastery. Gain high level insight into how Auto Layout works, and strategies for debugging layout issues. Learn how to use new APIs for constraint creation and layout guides to build more complex layouts.
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Mysteries of Auto Layout, Part 1
Auto Layout is a powerful constraint-based layout engine that can drive complex and dynamic interfaces on both iOS and OS X. Learn about the new UIStackView, now your first stop for interfaces built with Auto Layout. See how to build self-sizing views using Auto Layout, and gain critical...
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Implementing UI Designs in Interface Builder
Apps that stand out must be attractive, intuitive, and easy to use. Interface Builder experts will give you the skills to turn your idea into a world class app. Learn to use the new stacks feature, create adaptable interfaces, employ asset catalogs, and design custom UI to build an outstanding...
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Storyboards and Controllers on OS X
Learn how to build your OS X application using storyboards, view controllers, and gesture recognizers. See how these OS X enhancements can simplify complex user interaction controller code. Gain a practical understanding with a high level introduction to Xcode's Interface Builder integration and...
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Performance -
Core Data Best Practices
As your app gains more customers and becomes more feature-rich, you may find yourself with new problems to solve. Core Data is a powerful tool that has changed a lot over the years. Learn about the new best practices in Core Data, such as how to use concurrency and persistent history, and...
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Metal Game Performance Optimization
Realize the full potential of your Metal-based games by tackling common issues that cause frame rate slowdowns, stutters, and stalls. Discover how to clear up jitter and maintain a silky-smooth frame rate with simple changes in frame pacing. Get introduced to new tools for analyzing rendering...
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What's New in LLVM
The LLVM suite of compiler tools in Xcode 10 have new language features, improved diagnostics, and more powerful optimizations. Find out about improvements to ARC for Objective-C, keep up with the newest additions to C++, get an overview of new and improved diagnostics and static analyzer checks,...
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Metal for Accelerating Machine Learning
Metal Performance Shaders (MPS) includes a highly tuned library of machine learning primitives leveraging the tremendous power of the GPU. With iOS 12 and macOS Mojave, MPS adds capabilities to accelerate the computationally intensive task of training a neural network. Learn performance...
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Metal Shader Debugging and Profiling
Metal provides powerful tools for analyzing shader behavior and optimizing performance. Dive into troubleshooting vertex-stage problems with new geometry viewing capabilities in Xcode. Use the shader debugger to step through vertex, fragment, and compute shader execution line-by-line. Get details...
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Measuring and Optimizing HLS Performance
HTTP Live Streaming (HLS) is used to stream live and on-demand content to global audiences. Discover how to adjust and tune stream authoring and delivery elements to improve the viewing experience. Learn how to accurately measure your streaming performance, identify optimization opportunities,...
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Advances in TVMLKit
TVMLKit allows you to quickly build native tvOS apps that are backed by XML templates and JavaScript logic. Take your TVMLKit apps even further with new tvOS 11 technologies and features. Learn about Right-to-Left support, performance optimizations, significant enhancements to Web Inspector, and...
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Accelerate and Sparse Solvers
Learn about Sparse Matrix Solvers in the Accelerate framework. In addition, find out how Accelerate's Basic Neural Network Subroutines (BNNS), vDSP, simd and other subframeworks give you fast, energy-efficient signal and image processing and handle large-scale mathematical computations.
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Metal 2 Optimization and Debugging
Developing Metal 2-based apps is even easier with the redesigned tools for debugging and profiling in Xcode. Dive into the enhanced Metal Frame Debugger and explore techniques for fine-tuning graphics and compute workloads. Learn about accessing detailed GPU performance counters, and check out...
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Writing Energy Efficient Apps
People expect long battery life on their mobile devices, and apps play a vital role in achieving that experience. Learn strategies to conserve energy while providing the best experience for your app. Find out about the key areas that affect energy consumption of an app as well as how to best use...
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Efficient Interactions with Frameworks
Border crossings can be smooth and efficient or slow and tedious. The boundary between an app and a framework is analogous, but inefficiencies may not always be obvious. Whether it's passing data to an API or understanding how to stay on the fast path while rendering text, we'll explore various...
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Neural Networks and Accelerate
The Accelerate framework gives you fast, energy efficient signal and image processing and linear algebra libraries. Learn about new libraries dedicated to high performance neural networks and numerical integration.
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Advanced Metal Shader Optimization
The Metal shading language is an easy-to-use programming language for writing graphics and compute functions which execute on the GPU. Dive deeper into understanding the design patterns, memory access models, and detailed shader coding best practices which reduce bottlenecks and hide latency...
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Optimizing I/O for Performance and Battery Life
Gain specific insights into tuning your application for better I/O performance. Learn best practices to reduce local storage operations and trim your memory usage. Get details on how to update your app to increase responsiveness and extend battery life.
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WatchKit In-Depth, Part 2
Move beyond architecture changes for Watch apps and explore the different ways you can use the Digital Crown to enhance your apps. Find out how to create persistent app experiences to keep your Watch app at the ready for users and learn how to use the playback and recording APIs to add audio and...
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WatchKit Tips and Tricks
Apple Watch apps should load quickly and be responsive to users. Learn tips and tricks for optimizing your existing apps and gain insights specific to communicating between Apple Watch and iPhone, creating responsive layouts, decreasing loading times, and more.
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Debugging Energy Issues
Learn how to debug energy issues in your app. See the energy debugging tools on iOS and walk through debugging common energy issues in a sample app.
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Metal Performance Optimization Techniques
Learn best practices to maximize the efficiency of your Metal based apps and attain high frame rates. Gain insight into powerful tools for analyzing and optimizing performance for both the CPU and GPU. Discover how to identify bottlenecks, tune performance hot-spots, and overcome any hurdles that...
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Performance on iOS and watchOS
Great performance is a prerequisite for delivering a compelling and immersive app experience that keeps users engaged. Learn best practices and strategies for characterizing and improving the performance of your code for iPhone, iPad, and Apple Watch.
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Writing Energy Efficient Code, Part 1
People expect long battery life on both their iOS devices and Mac laptops and your apps play a vital role in ensuring long battery life. Get an overview of energy efficiency best practices and learn about new APIs in iOS and OS X that help you to minimize the energy impact of your code.
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Fix Bugs Faster using Activity Tracing
Finding and diagnosing application bugs can be very difficult. Activity Tracing is a new technology that can dramatically improve your speed and efficiency finding bugs in your code. Log trace messages to an auto-generated ring buffer while associating them with the originating user action...
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Ingredients of Great Games
Kick off the game development sessions of WWDC 2014 by gaining insight into the key ingredients needed to create a great game for iOS. Understand the importance of harnessing the full capabilities of the platform to create a richer gameplay experience. Get practical guidance about game production...
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Advanced Graphics and Animations for iOS Apps
Creating a responsive UI requires an understanding of Core Animation and how mobile GPUs work. Learn about the iOS rendering pipeline in Core Animation, the new UIVisualEffectView and how it utilizes the GPU. Find out about the available tools for profiling UI performance. See how to identify and...
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Writing Energy Efficient Code, Part 2
Go in-depth into specific API and design patterns you can use to avoid consuming excessive energy as well as tools that can help you diagnose issues.
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Swift -
Using Collections Effectively
Every app uses collections! Go beyond the basics with specific tips on how best to use indices, slices, bridging, laziness, and reference types. Gain better understanding of when to use each collection for best performance.
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Getting to Know Swift Package Manager
The Swift Package Manager makes it possible to easily develop and distribute source code in the Swift ecosystem. Learn about its goals, design, unique features, and the opportunities it has for continued evolution.
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Swift Generics
Generics are one of the most powerful features of Swift, enabling you to write flexible, reusable components while maintaining static type information. Learn about the design of Swift's generics, including how to generalize protocols, leverage protocol inheritance to express the varying...
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Data You Can Trust
A lot can go wrong when loading data into your app. Whether you work directly with JSON and property lists, or with higher-level APIs such as NSCoding and Codable, learn how to defend your customers and secure your code against invalid or malicious data. Avoid fatal assumptions by validating...
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Embracing Algorithms
When you imagine building a new app, what do you think about? Models, views, and controllers deserve their prominent place in the design process, but we don't often give the same attention to the underlying work our apps need to do. Understand how to identify and optimize the algorithms in your...
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Create Your Own Swift Playgrounds Subscription
Swift Playgrounds is a revolutionary iPad app to teach coding with the powerful Swift programming language. Learn how to create your own content for Swift Playgrounds using the new template, and find out how to use the subscription format to host your own feed online for others to access.
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What's New in Swift
Hear about the latest advancements in Swift, the safe, fast, and expressive language. Find out about improvements to build times, code size, and runtime performance. Learn how to take advantage of new features in your code that eliminate boilerplate, increase safety and security, and improve your...
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What's New in Swift
Swift 4 continues the evolution of the safe, fast, and expressive language, with better performance and new features. Learn about the new String and improved generics, see how Swift 4 maintains support for your existing Swift 3 code, and get insight into where Swift is headed in the future.
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What's New in Foundation
Whether you're building apps for iOS, macOS, watchOS, or tvOS, a lot of the functionality you get from Apple's SDKs comes from the Foundation framework. Join the Foundation engineering team to hear about the improvements they've been working on. Learn how significant changes to key paths can help...
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Teaching with Swift Playgrounds
Teaching can be difficult and teaching programming can be even harder — it's abstract and concrete at the same time, and you must help the learner build a mental model of what code really does. Find out how the Swift Playgrounds content team works through the teaching process, from idea to...
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What’s New in Swift Playgrounds
Learn more about the new features in Swift Playgrounds, such as support for localized content and user-added pages. Learn how to leverage these new features to build engaging content in the latest playground book format. Harness external accessories using the new PlaygroundBluetooth framework,...
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Localizing Content for Swift Playgrounds
Localizing a playground book is more than just translation. Explore best practices, potential problem areas, and the unique challenges of localizing educational content. Understand how a localized playground book is structured and hear about the lessons learned by the people who made it happen.
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SceneKit in Swift Playgrounds
Discover tips and tricks gleaned by the Swift Playgrounds Content team for working more effectively with SceneKit on a visually rich app. Learn how to integrate animation, optimize rendering performance, design for accessibility, add visual polish, and understand strategies for creating an...
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Introducing Swift Playgrounds
Learn more about Swift Playgrounds, the new iPad app that teaches coding using the powerful Swift programming language. Explore the featured content, complete with puzzles that help you master each coding concept. Learn more about the coding features of Swift Playgrounds and see how the editing...
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Improving Existing Apps with Modern Best Practices
The best way to avoid technical debt is to incrementally build-up technical credit. This session builds on last year's Modernizing Existing Apps with Swift presentation to show you how you can continue modernizing your codebase while adopting best practices and adding new feature work.
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Going Server-side with Swift Open Source
While the Swift language makes it easy to write software that is incredibly fast and safe by design, Swift being open source means you can use it on an even broader range of platforms, from mobile devices to the desktop and in the cloud. Come for an overview of available projects at Swift.org and...
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Swift API Design Guidelines
Swift 3 introduces new API Design Guidelines specifically crafted to the unique character of Swift for clear, concise code. This talk will explore the philosophy behind the Swift API Design Guidelines and their application throughout the Swift Standard Library and the Cocoa and Cocoa Touch APIs...
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What's New in Foundation for Swift
Underlying nearly every iOS, macOS, watchOS, and tvOS application sits the Foundation framework. See how improvements to the fundamental set of API in Foundation will improve the experience of using Swift for the entire Cocoa and Cocoa Touch SDK. Learn how Foundation framework's new value types,...
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Protocol and Value Oriented Programming in UIKit Apps
Building on last year's Protocol-Oriented Programming and Building Better Apps with Value Types sessions, this year's session will highlight tips and tricks for building better Swift apps. See how you can incorporate these design approaches into a real MVC-based Cocoa Touch app, especially in the...
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Concurrent Programming With GCD in Swift 3
Swift 3 provides new interfaces that make it easier than ever to write applications with Grand Central Dispatch. Learn the basics of GCD and best practices on how to use it to architect your Swift application. You'll also hear about new APIs and other GCD improvements.
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Getting Started with Swift
Updated to include the latest features, syntax and best practices for Swift 3, this session introduces the basics of the Swift programming language. Learn the recommended manner in which to declare variables, define functions, work with fundamental value types, protocols, generics, and more...
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Understanding Swift Performance
In this advanced session, find out how structs, classes, protocols, and generics are implemented in Swift. Learn about their relative costs in different dimensions of performance. See how to apply this information to speed up your code.
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Building Better Apps with Value Types in Swift
Swift supports rich first-class value types in the form of powerful structs, which provide new ways to architect your apps. Learn about the differences between reference and value types, how value types help you elegantly solve common problems around mutability and thread safety, and discover how...
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Swift in Practice
Learn how Swift can help you define away some common pitfalls in app development, allowing your apps to benefit from safer runtime behavior while enjoying strong guarantees provided by Swift at compile-time. Hear about how API availability checking in Swift allows you to easily take advantage of...
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What's New in Swift
Swift continues its rapid advancement with version 2. New optimizations make your app run even faster, and new syntax makes your code more expressive. Learn about powerful new features like error handling, testability, and availability checking. This session will help you write even better apps...
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Protocol-Oriented Programming in Swift
At the heart of Swift's design are two incredibly powerful ideas: protocol-oriented programming and first class value semantics. Each of these concepts benefit predictability, performance, and productivity, but together they can change the way we think about programming. Find out how you can...
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Swift and Objective-C Interoperability
Discover new features that make it easier than ever to craft Objective-C APIs that work beautifully in Swift, as well as new Swift language features that provide even better interoperability. Apple engineers will also discuss enhancements to Apple's SDKs that improve the Swift experience.
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Improving Your Existing Apps with Swift
See how you can incrementally add Swift into your existing Objective-C codebase and app development workflow. Learn how to leverage Swift's powerful language features to develop robust applications that are faster to write and easier to maintain.
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Advanced Swift Debugging in LLDB
Explore LLDB's powerful features that help you more quickly debug your Swift code. Learn about LLDB's support for protocols, generics, optionals, and mixed-language source code.
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Advanced iOS Application Architecture and Patterns
Explore a selection of high-level software engineering techniques presented in the context of Cocoa Touch. Learn how to manage complexity in large codebases by clearly defining where truth resides, by controlling state with Swift's powerful value types and immutability, and by thinking in terms...
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Testing -
iOS Memory Deep Dive
Discover how memory graphs can be used to get a close up look at what is contributing to an app's memory footprint. Understand the true memory cost of an image. Learn some tips and tricks for reducing the memory footprint of an app.
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Practical Approaches to Great App Performance
All apps benefit from a focus on performance and an increase in overall responsiveness. This information packed session gives you strategies for fixing performance problems using Instruments and other tools. Additionally, get practical advice based on experience in tuning Apple's own apps...
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What's New in Accessibility
Discover what's new in accessibility in iOS, watchOS, macOS, and tvOS. Learn how to audit an App for accessibility, and take advantage of new assistive features. Topics include how to best customize how Voice Over describes an App UI to the user, how to enhance the accessibility user experience...
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Engineering for Testability
Unit testing is an essential tool to consistently verify your code works correctly. Discover techniques for designing the code of your app so that it can be easily tested. Find out the best practices for developing a test suite that evolves with your app and scales as your app grows.
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Making Great SiriKit Experiences
People love Siri so it's essential to use SiriKit optimally for your app to provide a great Siri experience. Learn how to solve common pitfalls related to contact resolution, using Touch ID, and more. Find out how UI tests can benefit your SiriKit extension and how they can speed up the...
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Supporting the Enterprise with OS X Automation
Automation is the life blood of any organization, providing speed, accuracy, and the ability to efficiently scale in-house processes. See how the automation technologies in OS X can easily and quickly configure shared-use iOS devices, generate, update, and distribute company documents and provide...
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JavaScript for Automation
Automation in OS X has always been about power and choice. Scriptable applications, including Pages, Keynote, Numbers, and the Finder, can already be automated using a variety of languages, including AppleScript, Objective-C, Perl, Python, and Ruby. With OS X Yosemite, application scripting...
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Xcode -
What’s New in Energy Debugging
People expect long battery life on their mobile devices, and apps play a vital role in achieving that experience. Understand how app behavior affects battery consumption, and learn strategies to conserve energy while providing the best experience for your app. Find out how Xcode Energy Reports...
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Building Faster in Xcode
Build your apps faster in Xcode 10. Learn how to structure your projects and tweak your code to take full advantage of all processor cores. Whether you've made a few small code changes you want to give a try, or you're building your full app for release, these techniques will cut the time it...
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What's New in Testing
Hear about exciting improvements to code coverage, including how you can build your own automation on top of Xcode's coverage reports. Learn how to dramatically speed up the execution of your tests by leveraging distributed parallel testing, new in Xcode 10.
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Creating Custom Instruments
Understand how custom instruments are useful and when they should be used. Get an in-depth view of the architecture of custom instruments and how to create them. Understand the attributes of a good instrument. Dive into advanced modeling and how to use the CLIPS language.
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Measuring Performance Using Logging
Learn how to use signposts and logging to measure performance. Understand how the Points of Interest instrument can be used to examine logged data. Get an introduction into creating and using custom instruments.
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Getting the Most out of Playgrounds in Xcode
Discover major advancements in Xcode playgrounds. Learn advanced tips and techniques, hear about new and often overlooked workflows, and rediscover the tools provided when coding in playgrounds.
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Behind the Scenes of the Xcode Build Process
Ever wonder what happens when you build your project in Xcode? Learn how Xcode automates the steps required to build an application, and go behind the scenes to learn how clang, swiftc, and the linker work together to turn your source code into a working program.
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Understanding Crashes and Crash Logs
Sudden app crashes are a source of bad user experience and app review rejections. Learn how crash logs can be analyzed, what information they contain and how to diagnose the causes of crashes, including hard-to-reproduce memory corruptions and multithreading issues.
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Testing Tips & Tricks
Testing is an essential tool to consistently verify your code works correctly, but often your code has dependencies that are out of your control. Discover techniques for making hard-to-test code testable on Apple platforms using XCTest. Learn a variety of tips for writing higher-quality tests...
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Advanced Debugging with Xcode and LLDB
Discover advanced techniques, and tips and tricks for enhancing your Xcode debugging workflows. Learn how to take advantage of LLDB and custom breakpoints for more powerful debugging. Get the most out of Xcode's view debugging tools to solve UI issues in your app more efficiently.
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New Localization Workflows in Xcode 10
The localization process in Xcode 10 has been updated to aid you through the lifecycle of exporting, importing, and testing localized content in your apps. See new functionality added in Xcode 10 and learn how the new localization catalog helps you build world-class, localized apps.
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Optimizing App Assets
Learn how to use assets to bring visually compelling and data efficient artwork to your apps, leveraging new features in iOS 12. Gain insight into organizing, optimizing, and authoring artwork assets by using asset catalogs to their fullest. Learn techniques to better streamline workflows between...
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Source Control Workflows in Xcode
Xcode integrates with GitHub, Bitbucket, and GitLab to help you manage your source code, back up your files, and collaborate with others. Find out how to easily see the changes in your project right in the source editor, and learn how to use Xcode for common source control workflows with Git. See...
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What's New in Signing for Xcode and Xcode Server
Learn about new advances in Xcode's support for code signing, including more powerful distribution signing, better integration with Xcode Server, and more control for working with manual signing assets.
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App Startup Time: Past, Present, and Future
Learn about the dyld dynamic linker used on Apple platforms, how it's changed over the years, and where it's headed next. Find out how improved tooling makes it easier to optimize your app's launch time, and see how new changes coming in dyld will bring even further launch time improvements.
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Understanding Undefined Behavior
Undefined behavior in programming languages can introduce difficult to diagnose bugs and even lead to security vulnerabilities in your App. Learn more about undefined behavior, the tools available in Xcode 9 that address it, and why Swift is safer by design.
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Finding Bugs Using Xcode Runtime Tools
Learn how to use Xcode 9 runtime tools to help find issues and bugs, ranging from missing and unintended UI updates to integer overflows and data races on collection APIs. Hear about the new Undefined Behavior Sanitizer and Main Thread Checker runtime tools in Xcode 9, and the improvements to...
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Auto Layout Techniques in Interface Builder
Auto Layout enables you to easily create robust layouts for your apps. Hear details about new and existing techniques for building layouts in Interface Builder. Learn how to build more dynamic layouts and handle state changes using priorities and size classes. Find out how iOS 11 support for...
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GitHub and the New Source Control Workflows in Xcode 9
Learn about the new tools in Xcode 9 for exploring the source control history of your projects. See how Xcode integrates with GitHub, and discover how the new source control navigator makes it easy to browse branches, tags, and detailed history and commit information.
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Localizing with Xcode 9
Build world-ready apps using Xcode by following some simple steps to manage strings and assets, and display your user interface. Take your localized apps even further with new technologies and features in Xcode 9. Learn how Xcode 9 helps you design, localize, and test your app in multiple languages.
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Modernizing Grand Central Dispatch Usage
macOS 10.13 and iOS 11 have reinvented how Grand Central Dispatch and the Darwin kernel collaborate, enabling your applications to run concurrent workloads more efficiently. Learn how to modernize your code to take advantage of these improvements and make optimal use of hardware resources.
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SceneKit: What's New
SceneKit is a fast and fully featured high-level 3D graphics framework that enables your apps and games to create immersive scenes and effects. See the latest advances in camera control and effects for simulating real camera optics including bokeh and motion blur. Learn about surface subdivision...
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Debugging with Xcode 9
Xcode 9 introduces wireless development for iOS and tvOS. Discover how to configure and use wireless development with your devices. Learn about Xcode's latest debugging features — including debugging workflow enhancements, and new view debugging support for view controllers, SpriteKit and...
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What's New in Testing
Xcode 9 has new APIs for structuring your test logging and including your own attachments and screenshots, as well as new support for parallel device and simulator testing. Learn how to write UI tests that target multiple applications, and find out ways to improve the performance of your UI tests.
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System Trace in Depth
Join engineers from the Instruments team for another focused look at the System Trace Instruments profiling template and how to get the most out of it. Discover how threads, virtual memory, and locking interact to affect performance. Dive deep for a practical look at how you can improve your...
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Thread Sanitizer and Static Analysis
Xcode 8 makes it easier to find several new categories of bugs with improvements in Runtime Sanitization and the Clang Static Analyzer. The Thread Sanitizer will help you find data races and other concurrency bugs. The static analyzer has been extended to search for localizability issues, check...
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Advanced Testing and Continuous Integration
Take an advanced class in Testing and Xcode Server. You'll gain an in-depth knowledge on the lifecycle of a test, how they're are hosted, and how using modern observation can help you make bulletproof tests for your app. Then, learn about changes in Xcode Server that make continuous integration...
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What's New in LLVM
The Apple LLVM compiler in Xcode 8 adds new language features, improved diagnostics, and more powerful optimizations. Get an overview of some new Objective-C and C++ features and learn how to use advanced optimizations to speed up your apps.
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Using Time Profiler in Instruments
Learn how to make your apps faster and more efficient in this introduction to Time Profiler in Instruments. Walk through how to use Time Profiler to measure your app's performance. Learn how Time Profiler works and can be used to identify problems and verify your fixes. Discover how easy it is to...
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Using and Extending the Xcode Source Editor
Learn about all of the new, and a few existing, features of Xcode source editor. See how you can make the most of new code completion features, Swift image and color literals, and snippets. We'll also show how to add commands to the source editor with new Xcode Extensions that you can distribute...
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Visual Debugging with Xcode
Discover Xcode's enhancements for debugging autolayout issues at runtime. Learn how issues inside complex GKStateMachine objects can be easily debugged at runtime. Gain insight into finding performance bottlenecks inside SpriteKit and SceneKit apps more easily with the enhanced FPS gauge...
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Optimizing App Startup Time
Launching an App is a complicated and subtle process and the ramifications on launch times of different App design patterns are often non-obvious. Come learn what happens in the time between when an App begins launching and when the main() function gets control and how that time relates to the...
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Introduction to Xcode
Xcode enables you to create great apps for Apple platforms. This session will introduce you to the basics of creating a project with Xcode, and more. You'll learn how to comfortably navigate your project and gain insights into working with workspaces, targets, and schemes. We'll introduce you to...
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Making Apps Adaptive, Part 1
In this first part of a two part series, explore the motivation and concepts necessary to take advantage of trait collections. Walk through building an interface in Xcode and learn from the experts how to take advantage of new features to more easily create your app for different device sizes and...
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Auditing Your Apps for Accessibility
Making your app accessible helps you reach all of your potential users. Get introduced to the new Accessibility Inspector and learn how it streamlines finding and fixing accessibility issues across all Apple platforms. Go beyond the basics with our experts as they guide you through the process of...
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What's New in Xcode App Signing
Xcode provides powerful options for managing projects for small and large development teams. Learn how new features in Xcode simplify the process of certificate management, app signing and configuration of your project's build settings.
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What's New in Auto Layout
Get details about new features of Auto Layout in Xcode, Cocoa and Cocoa Touch. Explore the new NSGridView, allowing your Cocoa app to easily build grid interfaces. Dive deeper into new tools that enable you to quickly diagnose layout issues in your interface. Learn about the new features in Xcode...
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What's New in Swift
Hear about the newest features in Swift 3, the third major release of the safe, fast, and expressive language, and the first major release built with the open source community. Gain insight into the latest changes in Xcode including enhanced migration support to help move your code to Swift 3...
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Introducing On Demand Resources
iOS 9 introduces On Demand Resources, enabling the efficient delivery of rich games and full featured applications using dynamically loaded content. Significantly reduce the time between purchasing and running an app from the App Store, while also decreasing the required storage space by...
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Optimizing Swift Performance
Hear from the experts about how you can write faster Swift code and use Instruments to identify performance bottlenecks. Dive deep into specific techniques that will help you produce the most efficient code possible.
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Achieving All-day Battery Life
Learn why efficient software is the key to long battery life for both OS X and iOS devices. We'll explore where the energy in our batteries goes, how Apple hardware and software efficiently manage energy, and how you can make your code most efficient to ensure long battery life.
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What's New in Storyboards
Storyboards are a great way to build the user interface and flow of your application on iOS and OS X. Gain an understanding of how to effectively organize your storyboards, define segues for your interface, and easily unwind transitions. Dive into a detailed discussion of the new APIs, and hear...
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Continuous Integration and Code Coverage in Xcode
Xcode 7 includes new code coverage features to help you design a powerful test harness for your app. Learn all about coverage along with integration and improvements with Xcode Server.
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Authoring Rich Playgrounds
Learn about the new features in Xcode playgrounds such as inline results, auxiliary sources and resources, multiple pages, and markup for formatted text. Find out how to explore programming problems in a playground, and create engaging experiences for teaching and learning.
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UI Testing in Xcode
Xcode 7 introduces new UI testing features fully integrated into the IDE. Learn about the new APIs and how UI testing fits in with existing testing features in Xcode. See how to get started by recording your app, and how to efficiently craft and maintain UI tests.
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Advanced Debugging and the Address Sanitizer
Discover UI debugging and how to use advanced breakpoint actions to quickly explore and fix your app. Learn how the new Address Sanitizer feature finds buffer overflows, use-after-free errors, and other memory corruption bugs at run time.
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What's New in Xcode
Xcode is the development environment for creating great apps for Apple's platforms. Start the week by watching the Xcode team demonstrate the latest features and improved workflows in Xcode 7. This session also provides a complete overview of the in-depth developer tools topics covered at WWDC 2015.
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Profiling in Depth
Learn about time profiling down to the disassembly level to help you investigate the minute details of your application that affect its performance and responsiveness.
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App Thinning in Xcode
The app distribution pipeline is becoming more powerful and flexible. Learn to create full featured apps that are delivered to users devices with new App Thinning features such as slicing and ODR. See how to integrate these new features into your continuous integration and testing processes, and...
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Testing in Xcode 6
Unit testing is an essential tool to consistently verify your code works correctly. Learn how Xcode 6 takes this to the next level with support for performance testing, baselining, and integration with Xcode bots to continually monitor your performance over time and devices.
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Building Adaptive Apps with UIKit
Building your apps to be flexible enough to be used in different orientations and on different devices is crucial. Learn about the enhancements that have been made to UIKit view controllers to make it even easier for you to adapt your user interface to any size or orientation. See how to...
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Continuous Integration with Xcode 6
Xcode bots provide a seamless way to continually build, analyze, and test your applications across many devices. See the Xcode team show how to set up and configure bots, review unit and performance testing data, and set up custom triggers and integration points.
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What's New in Interface Builder
Interface Builder makes it easy to create world-class interfaces using the design canvas. Learn how to use storyboards to arrange the views of your app, use Auto Layout to adapt to changes, and see how to easily make connections between your UI and your implementation on both iOS and OS X.
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Debugging in Xcode 6
Xcode provides a powerful debugging user interface backed by the new state-of-the-art LLDB debugger. Discover how you can more easily explore and fix your user interfaces, add custom Quick Look support for your own classes and get deeper insight into how and from where your app is enqueuing work.
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Localizing with Xcode 6
Your app deserves a global audience, and iOS, OS X, and Xcode 6 make it easy to design and test applications in multiple languages. Discover how you can easily add and manage localized content, preview and test with different languages, and export and import content for localizers to translate.
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