Where from and how does an NSRulerView get its magnification from? I am not using the automatic magnification by NSScrollView but using my own mechanism. How do I relay the zoom factor to NSRulerView?
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Hey Everyone,
I can't see to ActiveLabel as it says there is no active module. Please help me.
Thanks,
Ben
import UIKit
import ActiveLabel
protocol TweetCellDelegate: AnyObject {
func handleProfileImageTapped(_ cell: TweetCell)
func handleReplyTapped(_ cell: TweetCell)
func handleLikeTapped(_ cell: TweetCell)
}
class TweetCell: UICollectionViewCell {
We've got a hard to repro issue on Intel only when performing UI layout. It seems the collection view code gets into a recursive loop of doom and eventually the app crashes.
This is only happening on Intel, the ARM version is fine. It seems related to this issue: https://developer.apple.com/forums/thread/732580 There an Apple Dev acknowledges that there are issues with the Intel version of the OS.
Here's the simplified stack we're seeing:
-[NSISEngine _coreReplaceMarker:withMarkerPlusDelta:]"
-[NSISEngine constraintDidChangeSuchThatMarker:shouldBeReplacedByMarkerPlusDelta:]",
-[NSISEngine tryToChangeConstraintSuchThatMarker:isReplacedByMarkerPlusDelta:undoHandler:]",
-[NSLayoutConstraint _tryToChangeContainerGeometryWithUndoHandler:]",
-[NSLayoutConstraint _setSymbolicConstant:constant:symbolicConstantMultiplier:]",
-[NSLayoutConstraint setConstant:]",
-[NSView(NSConstraintBasedLayoutInternal) _updateSimpleAutoresizingConstraintsInPlace:forAutoresizingMask:]",
NSViewUpdateConstraintsForFrameChange
-[NSView setFrameSize:]",
-[NSView setFrame:]",
-[NSClipView _updateOverhangSubviewsIfNeeded]",
-[NSClipView _reflectDocumentViewFrameChange]",
-[NSView _postFrameChangeNotification]","
-[NSView setFrameSize:]",
-[NSCollectionView setFrameSize:]",
-[NSView setFrame:]",
NSViewActuallyUpdateFrameFromLayoutEngine",
-[NSView resizeSubviewsWithOldSize:]",
-[NSView setFrameSize:]",
-[NSClipView setFrameSize:]",
-[NSView setFrame:]",
-[NSScrollView _setContentViewFrame:]",
-[NSScrollView tile]",
-[NSScrollView _tileWithoutRecursing]",
-[NSScrollView reflectScrolledClipView:]",
-[NSClipView _reflectDocumentViewFrameChange]_block_invoke",
-[NSClipView _reflectDocumentViewFrameChange]",
-[NSView _postFrameChangeNotification]",
-[NSView setFrameSize:]",
-[NSCollectionView setFrameSize:]",
-[NSView setFrame:]",
-[NSCollectionView _resizeToFitContentAndClipView]",
-[_NSCollectionViewCore setContentSize:]",
-[_NSCollectionViewCore _updateVisibleCellsNow:]"
-[_NSCollectionViewCore _updateVisibleCellsNow:]"
-[_NSCollectionViewCore _updateVisibleCellsNow:]"
-[_NSCollectionViewCore _updateVisibleCellsNow:]"
.
.
It seems to be limited to macOS 13.1 too. Hoping someone might have a clue?
Thanks,
Robert.
Here's a link to the full stack: https://www.icloud.com/notes/076h1RXj4rvv7TzS5ICnvG6vw#NSCollectionView_crash_stack:
Topic:
UI Frameworks
SubTopic:
AppKit
My Mac app crashes for some users inside VideoToolbox, and I'm not sure what to do with that, and how to fix it.
Here are couple of examples that repeating again and again for macOS 15.*
Thread 10 Crashed:
0 libsystem_pthread.dylib 0x000000018535a8e0 0x185359000 + 6368
1 VideoToolbox 0x0000000194f3e218 0x194f28000 + 90648
2 VideoToolbox 0x00000001951de384 0x194f28000 + 2843524
3 libxpc.dylib 0x000000018506f2c0 0x185060000 + 62144
4 libxpc.dylib 0x000000018506da14 0x185060000 + 55828
5 libdispatch.dylib 0x00000001851ad674 0x1851a9000 + 18036
6 libdispatch.dylib 0x00000001851c9c88 0x1851a9000 + 134280
7 libdispatch.dylib 0x00000001851b4a38 0x1851a9000 + 47672
8 libdispatch.dylib 0x00000001851ca9dc 0x1851a9000 + 137692
9 libdispatch.dylib 0x00000001851b4a38 0x1851a9000 + 47672
10 libdispatch.dylib 0x00000001851b5764 0x1851a9000 + 51044
11 libdispatch.dylib 0x00000001851bf4cc 0x1851a9000 + 91340
12 libdispatch.dylib 0x00000001851bf260 0x1851a9000 + 90720
13 libsystem_pthread.dylib 0x00000001853602e4 0x185359000 + 29412
14 libsystem_pthread.dylib 0x000000018535b0fc 0x185359000 + 8444
and
Thread 10 Crashed:
0 libsystem_pthread.dylib 0x00000001981fc364 0x1981fb000 + 4964
1 VideoToolbox 0x00000001a85f9964 0x1a81e8000 + 4266340
2 VideoToolbox 0x00000001a847a840 0x1a81e8000 + 2697280
3 libxpc.dylib 0x0000000197f09830 0x197efb000 + 59440
4 libxpc.dylib 0x0000000197f0812c 0x197efb000 + 53548
5 libdispatch.dylib 0x00000001980638a4 0x198048000 + 112804
6 libdispatch.dylib 0x00000001980660e8 0x198048000 + 123112
7 libdispatch.dylib 0x00000001980521b8 0x198048000 + 41400
8 libdispatch.dylib 0x0000000198066e4c 0x198048000 + 126540
9 libdispatch.dylib 0x00000001980521b8 0x198048000 + 41400
10 libdispatch.dylib 0x0000000198052e60 0x198048000 + 44640
11 libdispatch.dylib 0x000000019805be30 0x198048000 + 81456
12 libdispatch.dylib 0x000000019805bbf0 0x198048000 + 80880
13 libsystem_pthread.dylib 0x0000000198201c0c 0x1981fb000 + 27660
14 libsystem_pthread.dylib 0x00000001981fcb80 0x1981fb000 + 7040
and this one is for macOS 14
Thread 10 Crashed:
0 VideoToolbox 0x000000018f12ac90 0x18f11d000 + 56464
1 VideoToolbox 0x000000018f130a80 0x18f11d000 + 80512
2 VideoToolbox 0x000000018f131090 0x18f11d000 + 82064
3 VideoToolbox 0x000000018f130f94 0x18f11d000 + 81812
4 Remote for Mac 0x00000001048d521c 0x1048d0000 + 21020
5 Foundation 0x000000018174796c 0x181709000 + 256364
6 Foundation 0x000000018174782c 0x181709000 + 256044
7 Foundation 0x00000001817477bc 0x181709000 + 255932
8 Foundation 0x0000000181746b64 0x181709000 + 252772
9 Foundation 0x00000001817468d4 0x181709000 + 252116
10 Foundation 0x00000001817467c4 0x181709000 + 251844
11 libdispatch.dylib 0x00000001803b0470 0x18039d000 + 78960
12 libdispatch.dylib 0x00000001803a13e8 0x18039d000 + 17384
13 libdispatch.dylib 0x00000001803a48ec 0x18039d000 + 30956
14 libdispatch.dylib 0x00000001803a3f08 0x18039d000 + 28424
15 libdispatch.dylib 0x00000001803b2ea8 0x18039d000 + 89768
16 libdispatch.dylib 0x00000001803b36b8 0x18039d000 + 91832
17 libsystem_pthread.dylib 0x000000018054dfd0 0x18054b000 + 12240
18 libsystem_pthread.dylib 0x000000018054cd28 0x18054b000 + 7464
Based on crash reports for our app in production, we're seeing these SwiftUI crashes but couldn't figure out why it is there. These crashes are pretty frequent (>20 crashed per day).
Would really appreciate it if anyone has any insight on why this happens. Based on the stacktrace, i can't really find anything that links back to our app (replaced with MyApp in the stacktrace).
Thank you in advance!
Crashed: com.apple.main-thread
0 libdispatch.dylib 0x39dcc _dispatch_semaphore_dispose.cold.1 + 40
1 libdispatch.dylib 0x4c1c _dispatch_semaphore_signal_slow + 82
2 libdispatch.dylib 0x2d30 _dispatch_dispose + 208
3 SwiftUICore 0x77f788 destroy for StoredLocationBase.Data + 64
4 libswiftCore.dylib 0x3b56fc swift_arrayDestroy + 196
5 libswiftCore.dylib 0x13a60 UnsafeMutablePointer.deinitialize(count:) + 40
6 SwiftUICore 0x95f374 AtomicBuffer.deinit + 124
7 SwiftUICore 0x95f39c AtomicBuffer.__deallocating_deinit + 16
8 libswiftCore.dylib 0x3d783c _swift_release_dealloc + 56
9 libswiftCore.dylib 0x3d8950 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1>>::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 160
10 SwiftUICore 0x77e53c StoredLocation.deinit + 32
11 SwiftUICore 0x77e564 StoredLocation.__deallocating_deinit + 16
12 libswiftCore.dylib 0x3d783c _swift_release_dealloc + 56
13 libswiftCore.dylib 0x3d8950 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1>>::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 160
14 MyApp 0x1673338 objectdestroyTm + 6922196
15 libswiftCore.dylib 0x3d783c _swift_release_dealloc + 56
16 libswiftCore.dylib 0x3d8950 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1>>::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 160
17 SwiftUICore 0x650290 _AppearanceActionModifier.MergedBox.__deallocating_deinit + 32
18 libswiftCore.dylib 0x3d783c _swift_release_dealloc + 56
19 libswiftCore.dylib 0x3d8950 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1>>::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 160
20 SwiftUICore 0x651b44 closure #1 in _AppearanceActionModifier.MergedBox.update()partial apply + 28
21 libswiftCore.dylib 0x3d783c _swift_release_dealloc + 56
22 libswiftCore.dylib 0x3d8950 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1>>::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 160
23 libswiftCore.dylib 0x3b56fc swift_arrayDestroy + 196
24 libswiftCore.dylib 0xa2a54 _ContiguousArrayStorage.__deallocating_deinit + 96
25 libswiftCore.dylib 0x3d783c _swift_release_dealloc + 56
26 libswiftCore.dylib 0x3d8950 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1>>::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 160
27 SwiftUICore 0x4a6c4c type metadata accessor for _ContiguousArrayStorage<CVarArg> + 120
28 libswiftCore.dylib 0x3d783c _swift_release_dealloc + 56
29 libswiftCore.dylib 0x3d8950 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1>>::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 160
30 SwiftUICore 0x4a5d88 static Update.dispatchActions() + 1332
31 SwiftUICore 0xa0db28 closure #2 in closure #1 in ViewRendererHost.render(interval:updateDisplayList:targetTimestamp:) + 132
32 SwiftUICore 0xa0d928 closure #1 in ViewRendererHost.render(interval:updateDisplayList:targetTimestamp:) + 708
33 SwiftUICore 0xa0b0d4 ViewRendererHost.render(interval:updateDisplayList:targetTimestamp:) + 556
34 SwiftUI 0x8f1634 UIHostingViewBase.renderForPreferences(updateDisplayList:) + 168
35 SwiftUI 0x8f495c closure #1 in UIHostingViewBase.requestImmediateUpdate() + 72
36 SwiftUI 0xcc700 thunk for @escaping @callee_guaranteed () -> () + 36
37 libdispatch.dylib 0x2370 _dispatch_call_block_and_release + 32
38 libdispatch.dylib 0x40d0 _dispatch_client_callout + 20
39 libdispatch.dylib 0x129e0 _dispatch_main_queue_drain + 980
40 libdispatch.dylib 0x125fc _dispatch_main_queue_callback_4CF + 44
41 CoreFoundation 0x56204 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16
42 CoreFoundation 0x53440 __CFRunLoopRun + 1996
43 CoreFoundation 0x52830 CFRunLoopRunSpecific + 588
44 GraphicsServices 0x11c4 GSEventRunModal + 164
45 UIKitCore 0x3d2eb0 -[UIApplication _run] + 816
46 UIKitCore 0x4815b4 UIApplicationMain + 340
47 SwiftUI 0x101f98 closure #1 in KitRendererCommon(_:) + 168
48 SwiftUI 0xe2664 runApp<A>(_:) + 100
49 SwiftUI 0xe5490 static App.main() + 180
50 MyApp 0x8a7828 main + 4340250664 (MyApp.swift:4340250664)
51 ??? 0x1ba496ec8 (Missing)
Xcode 16 iOS18 WKWebView里包含http图片时无法显示
Topic:
UI Frameworks
SubTopic:
UIKit
So I am looking to use a custom NSWindow application (so I can implement some enhanced resizing/dragging behavior which is only possible overriding NSWindow).
The problem is my whole application is currently SwiftUI-based (see the project here: https://github.com/msdrigg/Roam/blob/50a2a641aa5f2fccb4382e14dbb410c1679d8b0c/Roam/RoamApp.swift).
I know there is a way to make this work by dropping my @main SwiftUI app and replacing it with a SwiftUI root view hosted in a standard AppKit root app, but that feels like I'm going backwards.
Is there another way to get access (and override) the root NSWindow for a SwiftUI app?
WKWebView cannot load and display HTTP image resources
Topic:
UI Frameworks
SubTopic:
UIKit
I have an application named "XY" that has been launched in several countries. Now, I intend to launch it in Turkey, but we are facing legal issues preventing us from using "XY" as the app's display name. Following the documentation, I localized the app's display name to "ZX" for both Turkish and English (Turkey). However, when users change their device settings, they do not see an option for English (Turkey) language selection. I assumed that for Turkish users, English (Turkey) would be the default language, but this is not the case. Could someone please assist me in resolving this issue? I've investigated options for localizing the display name based on region, but it seems that this functionality isn't feasible on iOS. In contrast, it's relatively straightforward to achieve on Android platforms.
Using the new floating tab bar with ios18 on ipad with an RTL language, when the tabbar is correctly flipped and the right buttons become left buttons, the buttons are pushed off the screen on initial load but do come back after some navigating / reloading, have recreated in a fresh project.
Hi.
I know to know which window gets hardware keyboard events (such as shortcut key) currently on iPad.
Until iPadOS 15.0, UIApplication.shared.keyWindow, which was deprecated on iPadOS 13.0 and didBecomeKeyNotification/didResignKeyNotification.
But after iPadOS 15.0, a keyWindow is managed by UIScene, not by UIApplication.
Each scene of my app always has just one window.
For my purpose, checking deprecated UIApplication.shared.keyWindow is still effective but didBecomeKeyNotification and didResignKeyNotification don't work because they are fired when a change happens only inside the scene.
So my questions are,
What is the new alternative of UIApplication.shared.keyWindow?
I know a wrong hack like
UIApplication.shared.connectedScenes.compactMap { $0 as? UIWindowScene }.first?.windows.filter { $0.isKeyWindow }.first
does not work since the order of connectedScenes is not related with getting hardware keyboard events.
What are the new alternatives of didBecomeKeyNotification/didResignKeyNotification which work on inter-scene?
The second question is more crucial.
Because about the first question, I can still use deprecated UIApplication.shared.keyWindow.
Thanks.
I want to hide some sensitive information when app is visible in the list of process on iOS.
I observed that privacySensitive() modifier is not working for my app in case when view is embedded in UIHostingController.
I works correctly for pure SwiftUI app.
Can someone confirm this?, any workaround to make it working for my case.
Description:
When initiating the print flow via UIPrintInteractionController, and no printer is initially connected, iOS displays all possible paper sizes in the paper selection UI. However, if a printer connects in the background after this view is shown, the list of paper sizes does not automatically refresh to reflect only the options supported by the connected printer.
If the user selects an incompatible paper size (one not supported by the printer that has just connected), the app crashes due to an invalid configuration.
Steps to Reproduce:
Launch the app and navigate to the print functionality.
Tap the Print button to invoke UIPrintInteractionController.
At this point, no printer is yet connected. iOS displays all available paper sizes.
While the paper selection UI is visible, the AirPrint-compatible printer connects in the background.
Without dismissing the controller, the user selects a paper size (e.g., one that is not supported by the printer).
The app crashes.
Expected Result: App should not crash
Once the printer becomes available (connected in the background), the paper size options should refresh automatically.
The list should be filtered to only include sizes that are compatible with the connected printer.
This prevents the user from selecting an invalid option, avoiding crashes.
Actual Result: App crashes
The paper size list remains unfiltered.
The user can still select unsupported paper sizes.
Selecting an incompatible option causes the app to crash, due to a mismatch between UI selection and printer capability.
Topic:
UI Frameworks
SubTopic:
UIKit
I have a popover/sheet in iOS which allows users to search and add items to a list. When the sheet is shown, the search should always be active.
I am using searchable on a NavigationStack inside the sheet. I am using the isPresented parameter to activate search.
My issue is with the animation of the search activation. Even if I use...
isPresented: .constant(true)
...the search isn't activated until the sheet has completed it's entrance animation, resulting in two stages of animation.
I can't add a video here, but the two images below show the steps I am seeing. First a slide up animation, with the search in the navigation drawer, then a second animation, once the sheet is fully in place, as the search becomes active.
Is it possible to merge these two animations, so search is in place when the sheet animates up?
Topic:
UI Frameworks
SubTopic:
SwiftUI
Has anyone gotten custom buttons to work on top of tvOS Map()? I've tried many variations of
FocusState
focusSection
.defaultFocus()
and as soon as the map appears at startup the buttons never get focus again. They are on a ZStack over the map. I could post code but truthfully nothing works for me. I'm wondering if anyone has successfully put focusable buttons on top of the map view.
I have a SwiftUI project which has the following hierarchy:
IOSSceneDelegate (App target) - depends on EntryPoint and Presentation static libs.
Presentation (Static library) - Depends on EntryPoint static lib. Contains UI related logic and updates the UI after querying the data layer.
EntryPoint (Static library) - Contains the entry point, AppDelegate (for its lifecycle aspects) etc.
I've only listed the relevant targets here.
SceneDelegate was initially present in EntryPoint library, because the AppDelegate references it when a scene is created.
public func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
// Set the SceneDelegate dynamically
let sceneConfig: UISceneConfiguration = UISceneConfiguration(name: "mainWindow", sessionRole: connectingSceneSession.role)
sceneConfig.delegateClass = SceneDelegate.self
return sceneConfig
}
The intent is to move the SceneDelegate to the Presentation library.
When moved, the EntryPoint library fails to compile because it's referencing the SceneDelegate (as shown above).
To remove this reference, I tried to set up the SceneDelegate in the old way - In the info.plist file, mention a SceneConfiguration and set the SceneDelegate in Presentation.
// In the Info.plist file
<key>UIApplicationSceneManifest</key>
<dict>
<key>UIApplicationSupportsMultipleScenes</key>
<true/>
<key>UISceneConfigurations</key>
<dict>
<key>UIWindowSceneSessionRoleApplication</key>
<array>
<dict>
<key>UISceneConfigurationName</key>
<string>Default Configuration</string>
<key>UISceneDelegateClassName</key>
<string>Presentation.SceneDelegate</string>
</dict>
</array>
</dict>
</dict>
// In the AppDelegate
public func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
// Refer to a static UISceneconfiguration listed in the info.plist file
return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
}
As shown above, the Presentation.SceneDelegate is referred in the Info.plist file and the reference is removed from the AppDelegate (in EntryPoint library).
The app target compiles, but when I run it, the SceneDelegate is not invoked. None of the methods from the SceneDelegate (scene(_:willConnectTo:options:), sceneDidDisconnect(_:), sceneDidEnterBackground(_:) etc.) are invoked. I only get the AppDelegate logs.
It seems like the Configuration is ignored because it was incorrect. Any thoughts? Is it possible to move the SceneDelegate in this situation?
The SwiftUI Playground code below demonstrates that a .jpeg image can be read and written to the iOS file system. While, a.png image can only be read; the writing request appears to be ignored. Can anyone please tell me how to code to save a .png image using SwiftUI to the iOS file system.
Code:
import SwiftUI
import UniformTypeIdentifiers
/*
(Copied from Playground 'Help' menu popup.)
UIImage Summary
An object that manages image data in your app.
You use image objects to represent image data of all kinds, and the UIImage class is capable of managing data for all image formats supported by the underlying platform. Image objects are immutable, so you always create them from existing image data, such as an image file on disk or programmatically created image data. An image object may contain a single image or a sequence of images for use in an animation.
You can use image objects in several different ways:
Assign an image to a UIImageView object to display the image in your interface.
Use an image to customize system controls such as buttons, sliders, and segmented controls.
Draw an image directly into a view or other graphics context.
Pass an image to other APIs that might require image data.
Although image objects support all platform-native image formats, it’s recommended that you use PNG or JPEG files for most images in your app. Image objects are optimized for reading and displaying both formats, and those formats offer better performance than most other image formats. Because the PNG format is lossless, it’s especially recommended for the images you use in your app’s interface.
Declaration
class UIImage : NSObject
UIImage Class Reference
*/
@main
struct MyApp: App {
var body: some Scene {
WindowGroup {
ContentView()
}
}
}
struct ImageFileDoc: FileDocument {
static var readableContentTypes = [UTType.jpeg, UTType.png]
static var writableContentTypes = [UTType.jpeg, UTType.png]
var someUIImage: UIImage = UIImage()
init(initialImage: UIImage = UIImage()) {
self.someUIImage = initialImage
}
init(configuration: ReadConfiguration) throws {
guard let data = configuration.file.regularFileContents,
let some = UIImage(data: data)
else {
throw CocoaError(.fileReadCorruptFile)
}
self.someUIImage = some
}
func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper {
switch configuration.contentType {
case UTType.png:
if let data = self.someUIImage.pngData() {
return .init(regularFileWithContents: data)
}
case UTType.jpeg:
if let data = self.someUIImage.jpegData(compressionQuality: 1.0) {
return .init(regularFileWithContents: data)
}
default:
break
}
throw CocoaError(.fileWriteUnknown)
}
}
struct ContentView: View {
@State private var showingExporterPNG = false
@State private var showingExporterJPG = false
@State private var showingImporter = false
@State var message = "Hello, World!"
@State var document: ImageFileDoc = ImageFileDoc()
@State var documentExtension = ""
var body: some View {
VStack {
Image(systemName: "globe")
.imageScale(.large)
.foregroundColor(.accentColor)
Text(message)
Button("export") {
if documentExtension == "png" {
message += ", showingExporterPNG is true."
showingExporterPNG = true
}
if documentExtension == "jpeg" {
message += ", showingExporterJPG is true."
showingExporterJPG = true
}
}
.padding(20)
.border(.white, width: 2.0)
.disabled(documentExtension == "")
Button("import") {
showingImporter = true
}
.padding(20)
.border(.white, width: 2.0)
Image(uiImage: document.someUIImage)
.resizable()
.padding()
.frame(width: 300, height: 300)
}
// exporter .png
.fileExporter(isPresented: $showingExporterPNG, document: document, contentType: UTType.png) { result in
switch result {
case .success(let url):
message += ", .\(documentExtension) Saved to \(url.lastPathComponent)"
case .failure(let error):
message += ", Some error saving file: " + error.localizedDescription
}
}
// exporter .jpeg
.fileExporter(isPresented: $showingExporterJPG, document: document, contentType: UTType.jpeg) { result in
switch result {
case .success(let url):
message += ", .\(documentExtension) Saved to \(url.lastPathComponent)"
case .failure(let error):
message += ", Some error saving file: " + error.localizedDescription
}
}
// importer
.fileImporter(isPresented: $showingImporter, allowedContentTypes: [.png, .jpeg]) { result in
switch result {
case .failure(let error):
message += ", Some error reading file: " + error.localizedDescription
case .success(let url):
let gotAccess = url.startAccessingSecurityScopedResource()
if !gotAccess {
message += ", Unable to Access \(url.lastPathComponent)"
return
}
documentExtension = url.pathExtension
guard let fileContents = try? Data(contentsOf: url)
else {
message += ",\n\nUnable to read file: \(url.lastPathComponent)\n\n"
url.stopAccessingSecurityScopedResource()
return
}
url.stopAccessingSecurityScopedResource()
message += ", Read file: \(url.lastPathComponent)"
message += ", path extension is '\(documentExtension)'."
if let uiImage = UIImage(data: fileContents) {
self.document.someUIImage = uiImage
}else{
message += ", File Content is not an Image."
}
}
}
}
}
Topic:
UI Frameworks
SubTopic:
SwiftUI
Tags:
Files and Storage
Developer Tools
iPad
Swift Playground
The Problem
I am trying to implement a pinch-to-zoom feature on images within a UIPageViewController. However, often times when trying to pinch to zoom, the magnification gesture gets overridden by the scrolling gesture built into the UIPageViewController. I'm not sure how to get around this. The Apple Photos app seems to allow pinch to zoom on photos inside a full-page scrolling view without any issue, so I believe it should be possible.
Versions: iOS 17.2.1 - iOS 18.2.1, Swift (SwiftUI), Xcode 15.1
Steps to Reproduce
Run this sample Xcode project on a physical device: https://drive.google.com/file/d/1tB1QyY6QPEp-WLzdHxgDdkM45xCAELLr/view?usp=share_link
Try pinching to zoom on the image. After a few goes at it, you'll likely find that one time it will scroll instead of pinching to zoom. It might take up to a dozen pinches to experience this issue.
What I've Tried
Making the magnification gesture a high priority gesture.
Having only one page in the paging view controller.
Subclassing UIScrollView and conforming to the UIGestureRecognizerDelegate in that subclass, as explained here: https://stackoverflow.com/a/51070947/12218938
Using the iOS 17 ScrollView instead. Unfortunately it has the same issue but even worse! It's possible that since this is a native SwiftUI view, people might have solutions to this, but from a brief search I couldn't find any.
If you set the data source to nil (which indicates that there are no other pages for the paging view controller to scroll to), it does work, but it's not a workable solution since the time you'd want to set the data source to nil is when the user pinches the screen, but you can't know when the user pinches the screen if the gesture doesn't work!
Other Ideas/Workarounds
We could have some "zoom" mode that temporarily cancels the ability to scroll while zooming. But this seems like not too nice/intuitive of a solution.
If there is no paging view that Apple provides which could be made compatible with a pinch-to-zoom gesture, it's possible we would have to make a completely custom paging view. But that would be a lot of work I presume, so it's probably not something we would have time for right now.
I currently face an Issue where the SafeAreaInsets on the iPhone 16 Pro Max is not respected on LaunchScreens.
Lets say you have an ImageView whose leading, trailing and top are equal to the SafeAreaLayoutGuides leading, trailing and top.
Then you have a SwiftUI View such as the following representing the same layout in code:
GeometryReader { reader in
ZStack {
VStack(spacing: 0) {
Spacer(minLength: 0)
.frame(height: reader.safeAreaInsets.top)
Image(decorative: "splashLogo")
Spacer(minLength: 0)
}
.frame(width: reader.size.width)
}
.edgesIgnoringSafeArea(.all)
}
Both the storyboard preview as well as the SwiftUI preview show identical results in Xcode. Launching the app on the device however briefly shows the image below the Dynamic Island cutout until the app is launched to the SwiftUI view. Noticed this only happening on the iPhone 16 Pro Max.
Topic:
UI Frameworks
SubTopic:
General
I'm developing a macOS application and facing an issue with NSTextField delegates after refactoring my code. Here's the situation:
I have an NSWindowController.
Inside the NSWindowController, there's a container NSView named containerView.
On top of containerView, I added a custom NSView subclass named MyDetailsView.
MyDetailsView has two NSTextField instances, and their delegates are properly set. The delegate methods like controlTextDidChange(_:) were getting called as expected.
Due to some additional requirements, I refactored MyDetailsView into MyDetailsViewController, a subclass of NSViewController.
I created a corresponding .xib file for MyDetailsViewController.
Updated the code to load and add MyDetailsViewController's view (view property) to containerView.
Verified that the NSTextField delegates are still being set, and the fields are displayed correctly in the UI.
However, after this refactor, the NSTextField delegate methods (e.g., controlTextDidChange(_:)) are no longer being triggered.
**What I've Tried: **
Verified that the delegates for the NSTextField instances are correctly set after the refactor. Ensured that the MyDetailsViewController's view is added to containerView.
Question: What
could be causing the NSTextField delegate methods to stop working after refactoring from NSView to NSViewController?
@IBOutlet weak var customeView: NSView!
var myDetailsViewController: MyDetailsViewController!
var myDetailsView: MyDetailsView!
var isViewController: Bool = true
override func windowDidLoad() {
super.windowDidLoad()
if isViewController {
myDetailsViewController = MyDetailsViewController(nibName: "MyDetailsViewController", bundle: nil)
self.customeView.addSubview(myDetailsViewController.view)
} else {
myDetailsView = MyDetailsView.createFromNib()
self.customeView.addSubview(myDetailsView!)
}
}
override func showWindow(_ sender: Any?) {
super.showWindow(nil)
window?.makeKeyAndOrderFront(nil)
}
override var windowNibName: NSNib.Name? {
return NSNib.Name("MyWindowController")
}}
class MyDetailsViewController: NSViewController {
@IBOutlet weak var textField: NSTextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do view setup here.
}
}
extension MyDetailsViewController: NSTextDelegate {
func controlTextDidChange(_ obj: Notification) {
guard let textField = obj.object as? NSTextField else { return }
print("The value is ----> (MyDetailsViewController) \(textField.stringValue)")
}
}
TextField delegate is set in XIB.