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AVCaptureSession Pausing Session
With the new camera privacy indicator, there is a new need to pause the session at certain times, ie when the full-screen view is presented over the camera preview. This was the only solution for me: func pauseSession () { self.sessionQueue.async { if self.session.isRunning { self.session.stopRunning() } } } func resumeSession () { self.sessionQueue.async { if !self.session.isRunning { self.session.startRunning() } } } This seems to be an expensive operation that takes time. The issue I seem to have is if pause and resume are called near each other in time, the whole app freezes for about 10 seconds, till going back to being responsive. This is mostly due to it still hasn't finished the last process (whether to stop or start). Is there a solution to this? The native camera app seems to do this fine. If you open it, open the last photo, you can see the green indicator on the top right going off (after becoming orange briefly), meaning the session has paused/stopped. If you swipe down on the photo, the session resumes. If you swipe and let it get canceled, quickly swipe again you can see the session pauses and resumes quickly over and over without any issues.
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2.4k
Mar ’21
New iOS 18 UIView animation methods not available yet?
On the WWDC24 session video 'Enhance your UI animations and transitions', Appls shows these new animation methods for UIKIT: switch gesture.state { case .changed: UIView. animate(.interactiveSpring) { bead.center = gesture.translation } case .ended: UIView. animate(spring) { bead.center = endOfBracelet } } As of iOS 18 Beta 2, I get an error for `UIView. animate(.interactiveSpring)` These new methods are not available yet?
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940
Jul ’24
iPhone 16 Camera Control and AVCaptureSlider – Is there a way to detect which slider is active?
I am following the Apple sample code and trying to add a manual focus lens position slider: @available(iOS 18.0, *) private func addCameraControls() { if !self.session.controls.isEmpty { for control in self.session.controls { self.session.removeControl(control) } } self.cameraControlFocusSlider = nil //Focus Slider if self.videoDevice!.isLockingFocusWithCustomLensPositionSupported { self.cameraControlFocusSlider = AVCaptureSlider("Focus", symbolName: "dot.square", in: 0.0...1.0) self.cameraControlFocusSlider!.setActionQueue(self.sessionQueue) { focusValue in //Do manual focus } if self.session.canAddControl(self.cameraControlFocusSlider!) { self.session.addControl(self.cameraControlFocusSlider!) } } } So there are these AVCaptureSessionControlsDelegate methods: final func sessionControlsDidBecomeActive(_ session: AVCaptureSession) { print ("sessionControlsDidBecomeActive") } final func sessionControlsWillEnterFullscreenAppearance(_ session: AVCaptureSession) { print ("sessionControlsWillEnterFullscreenAppearance") } final func sessionControlsWillExitFullscreenAppearance(_ session: AVCaptureSession) { print ("sessionControlsWillExitFullscreenAppearance") } final func sessionControlsDidBecomeInactive(_ session: AVCaptureSession) { print ("sessionControlsDidBecomeInactive") } So when self.cameraControlFocusSlider is presented, I have to show the current value of the lense position. Lens position can change from auto focus and also from manual focus by the user using the app UI. Is there a way to see if self.cameraControlFocusSlider is active or being used? Please note that I will have more than one AVCaptureSlider in the final code.
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427
Mar ’25
iOS 26 Liquid Glass - Without any Blur - Possible?
let glassView = UIVisualEffectView(effect: UIGlassEffect(style: .clear)) glassView.frame = CGRect(x: 100, y: 200, width: 200, height: 400) self.view.addSubview(glassView) Though UIGlassEffect has two variants: .regular and .clear, even the clear one has some blur on the background. Is there a way to do get absolute no blur? Edges still have the glass effect. Apple does this in two places: Camera app: Text magnifier:
Topic: Design SubTopic: General Tags:
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653
Oct ’25
iOS 26 Modal View Controller with Transparent Background
Prior to iOS 26, this successfully gave me a modal view with a transparent background: let settingsVC = MySettingsViewController() settingsVC.modalPresentationStyle = .automatic //settingsVC.modalPresentationStyle = .overCurrentContext self.present(settingsVC, animated: true, completion: { } MySettingsViewController: self.view.backgroundColor = UIColor(white: 0, alpha: 0.5) Now in iOS 26, modal view is presented in a opaque grey background.
Topic: Design SubTopic: General Tags:
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620
Oct ’25
Burst Mode Using Bracketed Capture?
Eventhough some apps out there figured out how to do proper burst capture that is equal to stock iOS Camera App, there is no official API to do so.Currently I have it where it wil call capturePhoto over and over, which is not fast enough. I've seen some hints floating around that the proper way to do this is using bracketed capture any input on this?Thanks in advance.
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3.4k
Apr ’23
App Privacy Listing and Crash Reports
Currently, I have an app that does not collect any user data. So the App privacy listing on the App Store is listed as "Does not collect any data." However, it still receives app crashes and other reports that are available via Xcode Organizer. I believe the user enables this via the prompt "Share analytics, diagnostics, and usage information with Apple" at the system level. So given above, do I need to change the listing to say it explicitly collects crash data?
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2.0k
Jan ’23
API to use New SF Pro Condensed/Compressed/Expanded
New variants of SF Pro were introduced for iOS 16, but I do not see an update to UIFont API to use them. https://developer.apple.com/documentation/uikit/uifont Another thread on here specified that it could be done through UIFontDescriptor, but it doesn't seem like thee that is the official way. I really wish there is more information on this. I am wanting to use Expanded for my iOS update.
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2k
Aug ’22
UIImageView preferredImageDynamicRange not working
I am trying to display HDR Images (ProRAW) within UIImageView using preferredImageDynamicRange. This was shown in a 2023 WWDC Video let imageView = UIImageView() if #available(iOS 17.0, *) { self.imageView.preferredImageDynamicRange = UIImage.DynamicRange.high } self.imageView.clipsToBounds = true self.imageView.isMultipleTouchEnabled = true self.imageView.contentMode = .scaleAspectFit self.photoScrollView.addSubview(self.imageView) I pull the image from PHImageManager: let options = PHImageRequestOptions() options.deliveryMode = .highQualityFormat options.isNetworkAccessAllowed = true PHImageManager.default().requestImage(for: asset, targetSize: self.targetSize(), contentMode: .aspectFit, options: options, resultHandler: { image, info in guard let image = image else { return } DispatchQueue.main.async { self.imageView.image =image if #available(iOS 17.0, *) { self.imageView.preferredImageDynamicRange = UIImage.DynamicRange.high } } } Issue The image shows successfully, yet not in HDR mode (no bright specular highlights, as seen when the same image ((ProRAW) is pulled on the native camera app. What am I missing here?
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1.1k
Sep ’23
iOS 18 Control Widget that opens a URL
I already have an iOS 17 App Intent that works with a URL: @available(iOS 16, *) struct MyAppIntent: AppIntent { static let title : LocalizedStringResource = "My App Inent" static let openAppWhenRun : Bool = true @MainActor func perform() async throws -> some IntentResult{ await UIApplication.shared.open(URL(string: "myapp://myappintent")!) return .result() } } Now, with iOS 18 and Control Widgets, I want to create a Control Widget button that smply opens the app with the same URL. However UIApplication code is not allowed within extensions. For this, Apple says to use OpenIntent which is shown here: Link Apple Sample Code from the link: import AppIntents struct LaunchAppIntent: OpenIntent { static var title: LocalizedStringResource = "Launch App" @Parameter(title: "Target") var target: LaunchAppEnum } enum LaunchAppEnum: String, AppEnum { case timer case history static var typeDisplayRepresentation = TypeDisplayRepresentation("Productivity Timer's app screens") static var caseDisplayRepresentations = [ LaunchAppEnum.timer : DisplayRepresentation("Timer"), LaunchAppEnum.history : DisplayRepresentation("History") ] } WWDC session video about this does not cover this particular method in detail and also this sample code is a bit confusing. So how can I alter this code to just open the app with a URL?
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1.6k
Sep ’24
LockedCameraCapture Does Not Launch The App from Lock Screen
My implementation of LockedCameraCapture does not launch my app when tapped from locked screen. But when the same widget is in the Control Center, it launches the app successfully. Standard Xcode target template: Lock_Screen_Capture.swift @main struct Lock_Screen_Capture: LockedCameraCaptureExtension { var body: some LockedCameraCaptureExtensionScene { LockedCameraCaptureUIScene { session in Lock_Screen_CaptureViewFinder(session: session) } } } Lock_Screen_CaptureViewFinder.swift: import SwiftUI import UIKit import UniformTypeIdentifiers import LockedCameraCapture struct Lock_Screen_CaptureViewFinder: UIViewControllerRepresentable { let session: LockedCameraCaptureSession var sourceType: UIImagePickerController.SourceType = .camera init(session: LockedCameraCaptureSession) { self.session = session } func makeUIViewController(context: Self.Context) -> UIImagePickerController { let imagePicker = UIImagePickerController() imagePicker.sourceType = sourceType imagePicker.mediaTypes = [UTType.image.identifier, UTType.movie.identifier] imagePicker.cameraDevice = .rear return imagePicker } func updateUIViewController(_ uiViewController: UIImagePickerController, context: Self.Context) { } } Then I have my widget: struct CameraWidgetControl: ControlWidget { var body: some ControlWidgetConfiguration { StaticControlConfiguration( kind: "com.myCompany.myAppName.lock-screen") { ControlWidgetButton(action: MyAppCaptureIntent()) { Label("Capture", systemImage: "camera.shutter.button.fill") } } } } My AppIntent: struct MyAppContext: Codable {} struct MyAppCaptureIntent: CameraCaptureIntent { typealias AppContext = MyAppContext static let title: LocalizedStringResource = "MyAppCaptureIntent" static let description = IntentDescription("Capture photos and videos with MyApp.") @MainActor func perform() async throws -> some IntentResult { .result() } } The Issue LockedCameraCapture Widget does not launch my app when tapped from locked screen. You get the Face ID prompt and takes you to just Home Screen. But when the same widget is in the Control Center, it launches the app successfully. Error Message When tapped on Lock Screen, I get the following error code: LaunchServices: store ‹private > or url ‹private > was nil: Error Domain=NSOSStatusErrorDomain Code=-54 "process may not map database" UserInfo=&NSDebugDescription=process may not map database, _LSLine=72, _LSFunction=_LSServer_GetServerStoreForConnectionWithCompletionHandler} Attempt to map database failed: permission was denied. This attempt will not be retried. Failed to initialize client context with error Error Domain=NSOSStatusErrorDomain Code=-54 "process may not map database" UserInfo=&NSDebugDescription=process may not map database, _LSLine=72, _LSFunction=_LSServer_GetServerStoreForConnectionWithCompletionHandler} Things I tried Widget image displays correctly App ID and the Provisioning Profile seem to be fine since they work fine when the same code injected in to AVCam sample app and when used the same App ID's. AppIntent file contains the target memberships of the Lock Screen capture and Widget Apple compiles without errors or warnings.
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220
Oct ’25
LockedCameraCaptureExtension and Sharing User Preferences
I have the main app that saves preferences to UserDefaults.standard. So I have this one preference that the user is able to toggle - isRawOn UserDefaults.standard.set(self.isRawOn, forKey: "isRawOn") Now, I have LockedCameraCaptureExtension which is required know if that above setting on or off during launch. Also if it's toggled within the extension, the main app should know about it on the next launch. The main app and the extension runs on separate containers and the preferences are not shared due to privacy reasons. Apple mentions of using appContext of CameraCaptureIntent, but not sure how above scenario is possible through that....unless I am missing something. Apple Reference What I have for CameraCaptureIntent: @available(iOS 18, *) struct LaunchMyAppControlIntent: CameraCaptureIntent { typealias AppContext = MyAppContext static let title: LocalizedStringResource = "LaunchMyAppControlIntent" static let description = IntentDescription("Capture photos with MyApp.") @MainActor func perform() async throws -> some IntentResult { .result() } }
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309
Nov ’25