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Canvas performance slow on Safari, iPad 10 only

This is my first time to post on this forum. If there are something we didn't notice, please tell me. Thanks. Background We're using canvas to provide a web component to marketing. https://demo.mescius.jp/spreadjs/BenchmarkSample/ Problem Recently we have met an issue from customer. He is using iPad 10th to access the web component but when he tries to scroll it and it's very slow on iPad 10th. His iPad OS version is 17.7 and this issue also can be reproduced on our iPad 10th with iPad OS 18.0.1. But if we use iPad 9th with iPad OS 17.7 and 18.0.1, things are fine and there isn't any performance issue. We developer took some time investigating and found it's because of iPad 10th's safari takes longer time to paint each frame. On iPad 9th, it needs nearly 10ms to paint each frame. But on iPad 10, it needs nearly 70ms to paint each frame. Also we can provide simple code for you to check the different. We tried to simulate the repaint when user is scrolling. You can see on iPad 9th, it will be 2~3ms but on iPad

Safari & Web General

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557

Nov ’24

Swift playgrounds ipad/icloud

Bonjour, a chaque installation de swift playgrounds sur ipad, icloud empeche la sauvegarde et empeche donc d’ouvrir les app. sur icloud drive les fichiers sont present mais a zero ko. par contre les fichiers playgroundsbook fonctionnent. la premiere solution que j’ai ***** etait de desactivé la sauvegarde icloud et ca a fonctionné en local. mais comme je veux mes fichiers sur le icloud drive j’ai tenté une autre approche. j’ai tenté de copié mes fichiers en local sur icloud drive ca ne fonctionne pas. puis j’ai juste fait un drag/drop de fichier app vers le playgrounds. l’app s’ouvre mais n’est pas sauvegardé dans icloud drive. par contre les modifs sont bien enregistrées. enfin j’ai refait la meme approche, une fois l’app ouverte dans playgrounds je l’ai partagé puis enregistré dans icloud. cette fois ci le fichier est pris en compte et fonctionne.

Developer Tools & Services Swift Playground iCloud Drive

1

0

507

Nov ’24

Reply to getattrlistbulk lists same files over and over on macOS 15 Sequoia

[quote='810759022, DTS Engineer, /thread/766035?answerId=810759022#810759022'] The big test I would add here is to call contentsOfDirectory(at:includingPropertiesForKeys:options:) as well or, even better, enumerate the directory with CFURLEnumeratorCreateForDirectoryURL(). Either of those should end up calling getattrlistbulk and a failure in either would be good confirmation that the problem isn't actually with your code. [/quote] Thanks for all your detailed insights. I understand that the URL version of try FileManager.default.contentsOfDirectory(atPath: path).count is faster, but both should call getattrlistbulk, and since at the very beginning I mentioned that it indeed returns a reasonable file count, it would seem that... there is indeed something wrong with my code? Although you also mentioned that you don't see any obvious failure point in it. I updated my feedback report FB15497909 on October 28 by uploading the sysdiagnose and other tests performed by the user, but haven't heard anything y

App & System Services Core OS

Nov ’24

Reply to AuthenticationServices framework returns an invalid signature when signing in with a passkey in a Swift app for iOS/macOS

I realize that I have actually made a big mistake. When receiving the challenge on the iOS client, I forgot to Base64 decode it, which led ASAuthorizationPlatformPublicKeyCredentialProvider.createCredentialAssertionRequest() to Base64 encode it a second time. When receiving the rawClientDataJSON from the ASAuthorizationResult, in order to send the appropriate challenge back to the server, I was Base64 decoding it from the rawClientDataJSON to then send it in the expected format (removed the second Base64 encoding) to the server. This was a trick I used for the .passkeyRegistration case (as I also forgot to Base64 decode the challenge in the first place there as well), which happened to work as there is no signature produced from the clientDataHash, hence just decoding the challenge afterwards was enough. But for the .passkeyAssertion case, as the signature is produced from the clientDataHash, this obviously doesn't work anymore. When finding this previous solution, I thought this was just some Base64

Privacy & Security General

Nov ’24

Reply to Get DNS servers from the system

[quote='768025021, jan_kala, /thread/768025, /profile/jan_kala'] I'd like to ask about the best way of getting a list of DNS servers from the system (iOS & macOS). [/quote] There isn’t a good way to do this on either platform. That’s because the concept of “a list of DNS servers” doesn’t make sense on our Apple systems. DNS servers can be scoped, based on a variety of criteria, and so there’s no one single list. On macOS you can get a lot more insight into this via System Configuration framework, but in the SC preferences and the SC dynamic store. Those APIs aren’t available on iOS. Regarding your big picture issue, if the device is on a captive network and you’re unable to communicate with your VPN server, shouldn’t you just take your tunnel down? Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com

App & System Services Networking

Nov ’24

Reply to Network framework and background tasks

Thanks for sharing your results. Regarding your remaining question, I’d like to clarify your big picture goal. When your app comes back to the foreground, I see three cases: The connection is functional (A). The connection has failed via ‘natural causes’, like an asteroid strike on your data centre (B). The connection has been defuncted (C). You can already distinguish case A, because your I/O handlers are still running, so you’re asking about distinguishing between case B and C. Right? But why do you need to distinguish those? Either your app needs a connection to the server or it doesn’t. If it does need that connection, it should try to open it, and that’s true regardless of whether the connection failed due to B or C. Or am I missing something? Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com

App & System Services Networking

Nov ’24

Reply to Crash casting class from obj_copyClassList to a type

[quote='812850022, fmoraes, /thread/767346?answerId=812850022#812850022, /profile/fmoraes'] The use case is finding out the list of classes that confirm to a given protocol or are subclasses of a desired class. [/quote] Right. And I consider that to be an anti-pattern on Apple platforms. You can make it work, but it has all sort of negative consequences. And that’s why I’m asking about the big picture. For example, if this were a tool that you only use during development, you should go to town! OTOH, if you plan to incorporate this into a shipping product, I’d advise you to rethink your choices. Consider this test project, which is your code wrapped into something I can run: import Foundation class BaseCounter: NSObject { } func withAllClasses(_ body: (UnsafeBufferPointer) throws -> R) rethrows -> R { var count: UInt32 = 0 let classListPtr = objc_copyClassList(&count) defer { free(UnsafeMutableRawPointer(classListPtr)) } let classListBuffer = UnsafeBufferPointer( start: classListPtr, count:

Programming Languages Swift

Nov ’24

MacOS input buffer size over 1020 bytes

Hello Currently, we are developing an application that collects measurement data from devices via USB port but we have some problems regarding input buffer size that might reduce the reading speed. The data size is quite big (~1.5 million bytes). For every read action, the app will check the available size in the input buffer by command: ioctl(serialPort.hHandle, FIONREAD, readBuffSize) Then that size will be passed as the desired size for the read command. Between read actions, there will be a short sleep (1 - 3 ms). Please confirm some points below: Regardless of the size of the measure data, the available size will only be up to 1020 bytes, is it expected? Is the above size OS defined or driver defined? Could we increase it? As we checked, there were some missing bytes between the measure data and the actual read data. Is there any chance that the data in the input buffer be overwritten while the read thread is in sleep? Any recommended technique that can increase reading speed while still maintai

App & System Services Drivers IOSurface

1

0

627

Nov ’24

Reply to Crash casting class from obj_copyClassList to a type

[quote='812537022, fmoraes, /thread/767346?answerId=812537022#812537022, /profile/fmoraes'] I was not expecting a cast to cause this threading violation message [/quote] It’s certainly weird, but its not hard to see how it could happen. If the cast ‘spins up’ the Objective-C class then its +initialize will run and that can do all sorts of odd things. I shoulda asked about this earlier, but what’s the big picture here? This pattern of searching the class list for all the subclasses of a class, or all the classes that conform to a protocol, is not something we generally do on Apple platforms. That’s for exactly the reason you’re bumping into here: The dynamic nature of the Objective-C runtime can result in unexpected side effects. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com

Programming Languages Swift

Nov ’24

UIPrintInteractionController IOS 18 issue on shared.

Only IOS 18+ bug. After tap share on UIPrintInteractionController - crash. So: #0 0x00000001bc38edf4 in _realizeSettingsExtension.cold.5 () #1 0x00000001bc310ed0 in _realizeSettingsExtension () #2 0x00000001bc33d100 in _ingestPropertiesFromSettingsSubclass () #3 0x00000001bc33be50 in __FBSIngestSubclassProperties_block_invoke () #4 0x00000001bc33bd7c in FBSIngestSubclassProperties () #5 0x00000001bc33d814 in FBSSettingForLegacySelector () #6 0x00000001bc30ecf8 in FBSSettingForSelector () #7 0x00000001bc350d98 in -[FBSMutableSceneSettings addPropagatedProperty:] () #8 0x00000001a64bae88 in __58-[_UISceneHostingController createSceneWithConfiguration:]_block_invoke_3 () #9 0x00000001c5bc16ec in -[FBScene _joinUpdate:block:completion:] () #10 0x00000001a64bab9c in -[_UISceneHostingController createSceneWithConfiguration:] () #11 0x00000001a64ba838 in -[_UISceneHostingController initWithAdvancedConfiguration:] () #12 0x00000001a64ba8cc in -[_UISceneHostingController initWithProcessIdentity:sceneSpecification:] ()

UI Frameworks UIKit UIKit

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382

Nov ’24

Genmoji only smile

I’ve found that I can’t generate any faces of people in playground (and in genmoji, to a lesser extent) that aren’t smiling with the biggest Tiger Woods/Diddy teeth. It’s annoying. Even when you expressly ask for frowns, or angry faces, you get these big goofy smiles. Any help would be much appreciated.

Machine Learning & AI Apple Intelligence

1

0

483

Nov ’24

"Fonts needed by this application are missing." alert upon opening SF Symbols.

When I was on the 15.1 developer beta, I downloaded the beta version of the SF Symbols app. It worked perfectly throughout the beta, but when 15.1 was released, I downloaded the stable version of SF Symbols as well and removed the beta version. However, now when it launches I am greeted by an alert titled Fonts need by this application are missing. It goes on to say that fonts may not display properly... etc, but I haven't noticed any issues viewing any symbols I have looked up, and they seem to show up properly when I define them in Xcode. I tried uninstalling and reinstalling the application, as well as following the advice in the alert by downloading the latest fonts from the Apple Developer website. but the alert still shows up everytime I launch SF Symbols. Any one else experiencing this issue or know of a way to solve it? It's not that big of an issue, it's just one extra click after all, but in case it might be in the future, I just thought I'd check with others. Thanks!

Developer Tools & Services Xcode SF Symbols

3

0

688

Nov ’24

Reply to Outgoing SSL connections fail on macOS 15, work fine on earlier versions

@Etresoft I'm not sure what language your app is written in, but ours is written in Common Lisp. Using Xcode isn't an option. With my last post, I showed that breaking the dependency on the Homebrew OpenSSL library doesn't do anything to change the errors, which don't happen in macOS < 15. It doesn't do anything to change the lldb hang when single stepping into a function in the SSL library, now statically bound into my own shared library. Making a standalone example with Xcode doesn't get me any closer to solving this problem for my customers, which are down at the moment. Downgrading to 14.7.1 isn't something they want to do, so they're waiting for me. It's just that I can't debug the problem. I've tried a lot of things over the last 10 days, and nothing has been effective. If the experiment today was successful, I would have embarked on the big task of making a static version, but that didn't work, so I'm back to square 1. I opened a DTS ticket and was told to post here. I'm hoping @DTS Enginee

App & System Services Networking

Nov ’24

Crash due to missing symbols from libc++ [macOS 11.7.10] [Big Sur]

We are seeing a crash on Big Sur 11.7.10 after switching the build system to use Xcode 15 Excerpt from crash Time Awake Since Boot: 1700 seconds System Integrity Protection: enabled Crashed Thread: 0 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Reason: DYLD, [0x4] Symbol missing Application Specific Information: dyld: launch, loading dependent libraries Dyld Error Message: Symbol not found: __ZNSt3__17codecvtIDiDu11__mbstate_tE2idE Referenced from: /Applications/SecureworksTaegis.app/Contents/MacOS/com.secureworks.agent.daemon.app/Contents/MacOS/com.secureworks.agent.daemon Expected in: /usr/lib/libc++.1.dylib in /Applications/SecureworksTaegis.app/Contents/MacOS/com.secureworks.agent.daemon.app/Contents/MacOS/com.secureworks.agent.daemon Build system has the following specs : ProductName: macOS ProductVersion: 14.3.1 BuildVersion: 23D60 Xcode 15.2 Build version 15C500b CMAKE PROPS set(CMAKE_CXX_STAN

Programming Languages General Xcode macOS Linker

5

0

987

Oct ’24

Reply to Core Data CloudKit stops syncing after incomprehensible archive error

This error message your post provided indicates that Core Data failed to unarchive the import request (NSCloudKitMirroringImportRequest). Archiving / unarchiving an import / export request is a Core Data internal logic, and so I agree your assessment that it is not about your code. The feedback report you filed (FB10392936) doesn't mention the error message, and so I'd suggest that you file a new one to specifically report the error – If you do so, please share your report ID here for folks to track. Regarding FB10392936, you most likely hit CloudKit throttles. For more information of this topic, see the following documentations: TN3162: Understanding CloudKit throttles Understand system throttles. When uploading a big data set and hitting CloudKit throttles, the only thing you can do is to lower the CloudKit operation rate. When using Core Data + CloudKit, however, you don't control how NSPersistentCloudKitContainer synchronizes data. Based on today's API, the only thing you can do is to somehow con

App & System Services iCloud & Data

Oct ’24

smb big sur

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