Developer Tools - Xcode
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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 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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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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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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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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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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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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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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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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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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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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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 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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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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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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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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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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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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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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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...
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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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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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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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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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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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