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 am trying to develop an app that enables calligraphers to use their Apple Pencil as a calligraphy pen. The problem I am facing is that I don't know how to customize the strokes drawn by the Apple Pencil using the PencilKit framework. I also tried to use UIKit and handle the touches by Apple Pencil, but I am not sure how to achieve the desired effect. Can anyone guide me to solve this issue?

I have a background process which is updating an IOSurface-backed CVPixelBuffer at 30fps. I want to render a preview of that pixel buffer in my window, scaled to the size of the NSView that's displaying it. I get a callback every time the pixelbuffer/IOSurface is updated. I've tried using a custom layer-backed NSView and setting the layer contents to the IOsurface -- which works when the view is created but it's never updated unless the window is resized or another window is in front of it. I've tried setting both my view and my layer SetNeedsDisplay(), I've tried changing the layerContentsRedrawPolicy to .onSetNeedsDisplay, I've tried making sure all my content and update code is happening on the UI thread, but I can't get it to dynamically update. Is there a way to bind my layer or view to the IOSurface once and then just have it reflect the updates as they happen, or, if not, at least mark the layer as dirty each frame when it changes? I've pored over the docs but I don't see a lot about the relationship between IOSurface and CALayer.contents, and when in the lifecycle to mark things dirty (especially when updates are happening outside the view). Here's example code: class VideoPreviewThumbnail: NSView, VideoFeedConsumer {   let testCard = TestCardHelper()       override var wantsUpdateLayer: Bool {     get { return true }   }   required init?(coder decoder: NSCoder) {     super.init(coder: decoder)     self.wantsLayer = true     self.layerContentsRedrawPolicy = .onSetNeedsDisplay      		/* Scale the incoming data to the size of the view */      self.layer?.transform = CATransform3DMakeScale(       (self.layer?.contentsScale)! * self.frame.width / CGFloat(VideoSettings.width),       (self.layer?.contentsScale)! * self.frame.height / CGFloat(VideoSettings.height),       CGFloat(1)) 	 /* Register us with the content provider */     VideoFeedBrowser.instance.registerConsumer(self)   }       deinit{     VideoFeedBrowser.instance.deregisterConsumer(self)   }       override func updateLayer() { 		/* ideally we woudln't need to do this */     updateLayer(pixelBuffer: VideoFeedBrowser.instance.renderer.pixelBuffer)   }    	/* This gets called every time our pixelbuffer is updated (30fps) */   @objc   func updateFrame(pixelBuffer: CVPixelBuffer) {     updateLayer(pixelBuffer: pixelBuffer)   }       func updateLayer(pixelBuffer: CVPixelBuffer) {     guard let surface = CVPixelBufferGetIOSurface(pixelBuffer)?.takeUnretainedValue() else {      print("pixelbuffer isn't IOsurface backed! noooooo!")       return;     } 	 /* these don't have any effect */ 	 //		self.layer?.setNeedsDisplay() //		self.setNeedsDisplay(invalidRect: self.visibleRect)     self.layer?.contents = surface   } }

The DDC/CI application can work well on MacbookPro/Mac Pro (Big Sur), but it doesn't work on M1 Mac (both macOS 11.0.1 and 11.1). M1’s graphics card is Apple, not Intel or AMD. Does this incompatible issue relate with new graphics card or kernel change? Any alternative solution for M1?

Hi all, I'm currently implementing a feature that performs customized behavior in each desktop (space). As far as I know, Apple does not have an API that can enumerate all spaces under each screen. I've only found a way that can get all spaces, but cannot find any method on how to determine each space belongs to which screen. Can somebody help me out? Thanks in advance.

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 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,                    &iterator) == kIOReturnSuccess)   {      io_registry_entry_t regEntry;            while ((regEntry = IOIteratorNext(iterator))) {        CFMutableDictionaryRef serviceDictionary;        if (IORegistryEntryCreateCFProperties(regEntry,                          &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 need to convert a PDF to bitmap. What should I use ? Is there any snippet in Objective-C ?

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?

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);

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

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.

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!

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

So we have an app that has been working for a very long time. It is generating a PDF that has a section for crew members that will list details of each crew member including a signature image. In iOS 15, the signature of the first crew member is being drawn for all crew members. Still working fine in other version of iOS. Here is the code looping through each crew member: for (ShiftCrew *crew in delegate.pcr.shift.shiftcrews) { NSString *tempSignatureFile; NSString *crewMemberName; tempSignatureFile = [Utils getFullPathForFile:crew.signature.fileName]; crewMemberName = [NSString stringWithFormat:@"%@, %@", crew.lastName, crew.firstName]; nextY = [self handleCrewMember:pdfContext andCrewMember:crewMemberName andSignatureFile:tempSignatureFile andPosition:position andBaseY:nextY]; } Code where the signatures etc are being drawn: if ([signatureFile length] > 0) { UIImage *myUIImage; if (self.restricted) { myUIImage = [UIImage imageNamed:@"Restricted Signature Image.png"]; } else { myUIImage = [EncryptionFunctions openEncryptedImage:signatureFile]; } CGContextDrawImage (pdfContext, CGRectMake(238, nextY - 21, 114, 28), myUIImage.CGImage); } Utils getFullPathForFile just appends the passed in file name to the path to the Documents folder. When I debug, I have verified that the signatureFile string is the correct path to the individual signature file image. To troubleshoot, right before CGContextDrawImage, I have inserted the following code to output the image files to an unencrypted png file: NSString *filePath = [Utils getFullPathForFile:[NSString stringWithFormat:@"%@.png", crewMember]];       [UIImagePNGRepresentation(myUIImage) writeToFile:filePath atomically:YES]; The resulting files are correct and different from each other. Administrator, admin: account, Test: What actually shows in the PDF: A few things I have tried: Converting to CIImage and then to CGImage Using drawInRect on the UIImages instead of drawing from the CGImages. Hard coded the different images based on the crew member names. It does print a different image if I hard code drawing the Restricted Signature Image.png file that is in the bundle for one of the crew members, but that's not too helpful in figuring out how to make this work so far. I tried to create a new project that just generates a PDF that draws the two signature files. It works fine. I also in the same project, had a separate function that similarly generates a PDF with the two signature files and it also works fine. However, as this app is quite large and old, there is a lot of legacy code, so it is hard to extract and isolate the code that can reproduce this issue. Anyone have any suggestions on troubleshooting this? Things to look into, or things to try? What is driving me crazy is how this code: NSString *filePath = [Utils getFullPathForFile:[NSString stringWithFormat:@"%@.png", crewMember]];       [UIImagePNGRepresentation(myUIImage) writeToFile:filePath atomically:YES];               CGContextDrawImage (pdfContext, signatureRect, myUIImage.CGImage); Saves two different images, but draws the same image twice. And only in iOS 15. Thanks for any help.

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