I'm using VNImageRequestHandler to recognize text using the camera. In my handler I'm using the topLeft, topRight, bottomLeft, bottomRight properties, which I'm scaling to the size of the canvas, to draw an outline around each text object. When I do this the Y position and Height are correct, but the Width is slightly smaller, and the X position centers the outline around the text. Any idea why this would be a different size?

Question What may cause this crash above iOS 14 or 15 Here are images about crash stack tree below:

I have a CALayer with many sublayers. Those sublayers have multiple CABasicAnimation added to them. Now, I'd like to render the whole layer subtree to the UIImage at a specific point of animation time. How could I achieve that? The only thing I found is a CALayer.render(in:) method but the docs say that this method ignores Core Animations :<

I'm trying to add an animated CALayer over my video and export it with AVAssetExportSession. I'm animating the layer using CABasicAnimation set to my custom property. However, it seems that func draw(in ctx: CGContext) is never called during an export for my custom layer, and no animation is played. I found out that animating standard properties like borderWidth works fine, but custom properties are ignored. Can someone help with that? func export(standard: Bool) { print("Exporting...") let composition = AVMutableComposition() //composition.naturalSize = CGSize(width: 300, height: 300) // Video track let videoTrack = composition.addMutableTrack(withMediaType: .video, preferredTrackID: CMPersistentTrackID(1))! let _videoAssetURL = Bundle.main.url(forResource: "emptyVideo", withExtension: "mov")! let _emptyVideoAsset = AVURLAsset(url: _videoAssetURL) let _emptyVideoTrack = _emptyVideoAsset.tracks(withMediaType: .video)[0] try! videoTrack.insertTimeRange(CMTimeRange(start: .zero, duration: _emptyVideoAsset.duration), of: _emptyVideoTrack, at: .zero) // Root Layer let rootLayer = CALayer() rootLayer.frame = CGRect(origin: .zero, size: composition.naturalSize) // Video layer let video = CALayer() video.frame = CGRect(origin: .zero, size: composition.naturalSize) rootLayer.addSublayer(video) // Animated layer let animLayer = CustomLayer() animLayer.progress = 0.0 animLayer.frame = CGRect(origin: .zero, size: composition.naturalSize) rootLayer.addSublayer(animLayer) animLayer.borderColor = UIColor.green.cgColor animLayer.borderWidth = 0.0 let key = standard ? "borderWidth" : "progress" let anim = CABasicAnimation(keyPath: key) anim.fromValue = 0.0 anim.toValue = 50.0 anim.duration = 6.0 anim.beginTime = AVCoreAnimationBeginTimeAtZero anim.isRemovedOnCompletion = false animLayer.add(anim, forKey: nil) // Video Composition let videoComposition = AVMutableVideoComposition(propertiesOf: composition) videoComposition.renderSize = composition.naturalSize videoComposition.frameDuration = CMTime(value: 1, timescale: 30) // Animation tool let animTool = AVVideoCompositionCoreAnimationTool(postProcessingAsVideoLayer: video, in: rootLayer) videoComposition.animationTool = animTool // Video instruction > Basic let videoInstruction = AVMutableVideoCompositionInstruction() videoInstruction.timeRange = CMTimeRange(start: .zero, duration: composition.duration) videoComposition.instructions = [videoInstruction] // Video-instruction > Layer instructions let layerInstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: videoTrack) videoInstruction.layerInstructions = [layerInstruction] // Session let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetHighestQuality)! exportSession.videoComposition = videoComposition exportSession.shouldOptimizeForNetworkUse = true var url = FileManager.default.temporaryDirectory.appendingPathComponent("\(arc4random()).mov") url = URL(fileURLWithPath: url.path) exportSession.outputURL = url exportSession.outputFileType = .mov _session = exportSession exportSession.exportAsynchronously { if let error = exportSession.error { print("Fail. \(error)") } else { print("Ok") print(url) DispatchQueue.main.async { let vc = AVPlayerViewController() vc.player = AVPlayer(url: url) self.present(vc, animated: true) { vc.player?.play() } } } } } CustomLayer: class CustomLayer: CALayer { @NSManaged var progress: CGFloat override init() { super.init() } override init(layer: Any) { let l = layer as! CustomLayer super.init(layer: layer) print("Copy. \(progress) \(l.progress)") self.progress = l.progress } required init?(coder: NSCoder) { super.init(coder: coder) } override class func needsDisplay(forKey key: String) -> Bool { let needsDisplayKeys = ["progress"] if needsDisplayKeys.contains(key) { return true } return super.needsDisplay(forKey: key) } override func display() { print("Display. \(progress) | \(presentation()?.progress)") super.display() } override func draw(in ctx: CGContext) { // Save / restore ctx ctx.saveGState() defer { ctx.restoreGState() } print("Draw. \(progress)") ctx.move(to: .zero) ctx.addLine(to: CGPoint(x: bounds.size.width * progress, y: bounds.size.height * progress)) ctx.setStrokeColor(UIColor.red.cgColor) ctx.setLineWidth(40) ctx.strokePath() } } Here's a full sample project if someone is interested: https://www.dropbox.com/s/evkm60wkeb2xrzh/BrokenAnimation.zip?dl=0

Nach dem Update auf Beta 9, 12.0 Beta (21A5543b) können Sie die Auflösung nicht mehr ändern! Vorher in beta 8 ging es ohne Probleme starte das MacBook Pro neu ohne die Auflösung geändert zu haben hat jemand eine Idee oder ein bug ?? habe ich auch schon so gemeldet

Since update to iOS 15, our app is crashing in the first controller, right after splash screen(log attached). To be mentioned that if app goes to background right after being active, it will only crash after i switch it back in foreground. At crash it gets me right to int main() without any relevant info to help me debug, except (maybe) this line in the console "[Unknown process name] CGBitmapContextCreateWithCallbacks: failed to create CGAutomaticBitmapContextInfo." I've tried using all exceptions breakpoint but didn't help debugging further. It seems to be an issue in storyboard and not a specific line of code. At start, the app has a tabBarController which integrates some controllers. The first goes like viewDidLoad, viewWillAppear, viewWillLayoutSubviews, viewDidLayoutSubviews and then dies before reaching viewDidAppear. Would appreciate some help 2021-09-27_10-34-54.4864_+0300-9047901996b77362f454f5d9fb324f4ab72e4b5d.crash

Hi There, I just bought a IIYAMA G-MASTER GB3461WQSU-B1 which has a native resolution of 3440x1440 but my MacBook Pro (Retina, 15-inch, Mid 2014) doesn't recognise the monitor and I can't run it at its full resolution. It is currently recognised as a PL3461WQ 34.5-inch (2560 x 1440). Is there anything that I can do to get it sorted or I will have to wait until this monitor driver is added to the Big Sur list? Thanks

I have some uncontroversial code that used to work perfectly in iOS 12 (and I think 13, from memory): let cropRect = mapVC.view.frame.inset(by: mapVC.view.safeAreaInsets).inset(by: mapVC.mapEdgeInsets) let mapRenderer = UIGraphicsImageRenderer(bounds: cropRect) let img = renderer.image(actions:  { _ in mapVC.view.drawHierarchy(in: mapVC.view.bounds, afterScreenUpdates: true) }) Now, I'm getting a partially rendered image (only the top 8-10 px or so - the rest is white/blank), and this message in the debugger: [Unknown process name] vImageConvert_AnyToAny - failed width = 0 height = 1 dst component = 16bit float dstLayout = ByteOrder16Little dstBytesPerRow = 0 src component = 16bit integer srcLayout = ByteOrder16Little srcBytesPerRow = 0 There seems to be very little online about this error and I have no clue where to start with it. The issue arises when calling .jpegData or .pngData methods on mapRenderer. No other changes to the view hierarchy or the rendered view since this was working just fine. Any suggestions? Xcode 12.4, iOS 14.3 running on an iPhone XS Max.

I really love Quartz Composer from Apple which is a quite old app, not updated for years. It works well on my 2015 mid MacBook Pro, but not on new M1 iMac. Does anyone know how to run this great app on my new machine? Thank you!

I want graphics card details using objective c. used IOServiceGetMatchingServices api for it, its working fine in Intel processor machine, but not returning model info for M1 machine. here is the code I was using    CFMutableDictionaryRef matchDict = IOServiceMatching("IOPCIDevice");        io_iterator_t iterator;        if (IOServiceGetMatchingServices(kIOMasterPortDefault,matchDict,                    &amp;iterator) == kIOReturnSuccess)   {      io_registry_entry_t regEntry;            while ((regEntry = IOIteratorNext(iterator))) {        CFMutableDictionaryRef serviceDictionary;        if (IORegistryEntryCreateCFProperties(regEntry,                          &amp;serviceDictionary,                           kCFAllocatorDefault,                           kNilOptions) != kIOReturnSuccess)       {          IOObjectRelease(regEntry);          continue;       }        const void *GPUModel = CFDictionaryGetValue(serviceDictionary, @"model");                if (GPUModel != nil) {          if (CFGetTypeID(GPUModel) == CFDataGetTypeID()) {            NSString *modelName = [[NSString alloc] initWithData:                       (NSData *)GPUModel encoding:NSASCIIStringEncoding];                        NSLog(@"GPU Model: %@", modelName);           [modelName release];         }       }        CFRelease(serviceDictionary);        IOObjectRelease(regEntry);     }      IOObjectRelease(iterator);   }

I have a macOS app that captures screen images. The first time I run this application, a dialog is shown directing the user to give my app Screen Recording permission. Is there a way I can trigger this dialog earlier and detect whether the permission was granted?

Objective and steps Use the device front true depth camera (iPhone 12 Pro Max) to capture image data, live photo data and metadata (e.g. depth data and portrait effects matte) using AVFoundation capture principles into an AVCapturePhoto object. Save this captured object with its metadata to PHPhotoLibrary using a PHAssetCreationRequest object API. Result Image data, live data, disparity depth data (640x480 px) and some metadata is stored with the image through the PHPhotoLibrary API but the high quality portrait effects matte is lost. Notes Upon receiving the AVCapturePhoto object from AVFoundation capture delegate API I can verify that AVCapturePhoto object contains a high quality portrait effects matte member object. Using object's fileDataRepresentation() to obtain Data blob, writing that to a test file URL and reading it back I can see that flattened data API writes and restores the portrait effects matte. However, it gets stripped from the data when writing through the PHPhotoLibrary asset creation request. When later picking the image e.g. with PHPickerViewController + PHPickerResult and peeking into the object's data with CGImageSourceCopyAuxiliaryDataInfoAtIndex() I can see that there is data dictionary only for key kCGImageAuxiliaryDataTypeDisparity, and kCGImageAuxiliaryDataTypeDepth and kCGImageAuxiliaryDataTypePortraitEffectsMatte are both missing. Please, anyone has more detailed information if this possible at all? Thanks!

I am using AVCapturePhoto to capture image. In didFinishProcessingPhoto i am getting image data using fileDataRepresentation. But when i convert this data to UIImage, it loses most of its metadata. I need to draw bezier path on UIImage and still maintain metadata. Is there any way to do this.

Steps to reproduce: Download and open the attached "ARKitTest" project Build and deploy the project to iOS Reproduced with:2018.4.31f1, 2019.4.20f1, 2020.2.4f1, 2021.1.0b5, 2021.2.0a4 Reproducible with iPhone 12 Pro (iOS 14.2.1) [Bug] iOS app crashes after some time (EXC_BAD_ACCESS) · Issue #716 · Unity-Technologies/arfoundation-samples (github.com) https://github.com/Unity-Technologies/arfoundation-samples/issues/716 Unity Issue Tracker - [iOS 14] EXC_BAD_ACCESS crash from com.apple.arkit.ardisplaylink (unity3d.com) https://issuetracker.unity3d.com/issues/ios-14-exc-bad-access-crash-from-com-dot-apple-dot-arkit-dot-ardisplaylink

Hi. The following code creates and initialises a simple progress bar. How would I add a callback to update the progress bar ? float prog = 0.5;     CFNumberRef cfNum = CFNumberCreate(kCFAllocatorDefault,kCFNumberFloatType, &prog);     const void* keys[] = { kCFUserNotificationAlertHeaderKey, kCFUserNotificationProgressIndicatorValueKey };      const void* vals[] = { CFSTR("Progress Bar"), cfNum};          CFDictionaryRef dict = CFDictionaryCreate(0, keys, vals,                     sizeof(keys)/sizeof(*keys),                     &kCFTypeDictionaryKeyCallBacks,                     &kCFTypeDictionaryValueCallBacks);           CFUserNotificationRef pDlg = NULL;      pDlg = CFUserNotificationCreate(kCFAllocatorDefault, 0,                          kCFUserNotificationPlainAlertLevel,                          &nRes, dict);