There is a serious usability issue with PHPickerViewController in a UIKit app running on macOS 26 via Mac Catalyst when the Mac Catalyst interface is set to “Scaled to Match iPad”. Mouse click and other pointer interactions do not take place in the correct position. This means you have to click in the wrong position to select a photo and to close the picker. This basically makes it unusable.
To demonstrate, use Xcode 26 on macOS 26 to create a new iOS app project based on Swift/Storyboard. Then update ViewController.swift with the following code:
import UIKit
import PhotosUI
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
var cfg = UIButton.Configuration.plain()
cfg.title = "Photo Picker"
let button = UIButton(configuration: cfg, primaryAction: UIAction(handler: { _ in
self.showPicker()
}))
button.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(button)
NSLayoutConstraint.activate([
button.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor),
button.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor),
])
}
private func showPicker() {
var config = PHPickerConfiguration()
config.selectionLimit = 10
config.selection = .ordered
let vc = PHPickerViewController(configuration: config)
vc.delegate = self
self.present(vc, animated: true)
}
}
extension ViewController: PHPickerViewControllerDelegate {
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
print("Picked \(results.count) photos")
dismiss(animated: true)
}
}
Then go to the "Supported Destinations" section of the project target. Add a "Mac (Mac Catalyst)" destination. Then under the "Deployment Information" section, make sure the "Mac Catalyst Interface" setting is "Scaled to Match iPad".
Then build and run the app on a Mac (using the Mac Catalyst destination) with macOS 26.0.1. Make sure the Mac has a dozen or so pictures in the Photo Library to fully demonstrate the issue. When the app is run, a simple screen appears with one button in the middle. Click the button to bring up the PHPickerViewController. Now try to interact with the picker interface. Note that all pointer interactions are in the wrong place on the screen. This makes it nearly impossible to choose the correct photos and close the picker.
Quit the app. Select the project and go to the General tab. In the "Deployment Info" change the “Mac Catalyst Interface” setting to “Optimize for Mac” and run the app again. Now the photo picker works just fine.
If you run the app on a Mac running macOS 15 then the photo picker works just fine with either “Mac Catalyst Interface” setting.
The problem only happens under macOS 26.0 (I do not have macOS 26.1 beta to test) when the “Mac Catalyst Interface” setting is set to “Scaled to Match iPad”. This is critical for my app. I cannot use “Optimize for Mac”. There are far too many issues with that setting (I use UIStepper and UIPickerView to start). So it is critical to the usability of my app under macOS 26 that this issue be resolved.
It is expected that PHPickerViewController responds correctly to pointer events on macOS 26 when running a Mac Catalyst app set to “Scaled to Match iPad”.
A version of this has been filed as FB20503207
Explore the various UI frameworks available for building app interfaces. Discuss the use cases for different frameworks, share best practices, and get help with specific framework-related questions.
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Hi folks,
I've used a NavigationSplitView within one of the tabs of my app since iOS 16, but with the new styling in iOS 18 the toolbar region looks odd. In other tabs using e.g. simple stacks, the toolbar buttons are horizontally in line with the new tab picker, but with NavigationSplitView, the toolbar leaves a lot of empty space at the top (see below). Is there anything I can do to adjust this, or alternatively, continue to use the old style?
Thanks!
I integrated an Advanced App Clip Experience to my app. In trying to test the App Clip Card, the card does not appear when I tap the link on my device that is associated to the Advanced App Clip Experience.
Listed are some contextual information:
Testing on device running on iOS 18.3.1
Associated Domains:
Main target app: applinks:
App clips target app: applinks: and appclips:
Archived and uploaded build to App Store Connect.
Green "Testing" status via Testflight.
On Distribution tab, green "Valid" status for build domain.
Advanced App Clip Experience green "Received" status.
Developer App Clip Testing Diagnostics:
Green "Register Advanced Experience" status
Green "App Clip Code" status
Warning "App Clip Published on App Store"
Orange Circle "Associated Domains"
After looking at countless threads, I still cannot for the life of me find a solution to test the App Clip. Any guidance would be extremely appreciated. I had also submitted a support ticket with case ID #102552504973.
The sample code provided in "Building a document-based app with SwiftUI" (https://developer.apple.com/documentation/swiftui/building-a-document-based-app-with-swiftui) does not work as expected.
The DocumentGroup/StoryView toolbar does not appear for documents opened in the App.
By removing the DocumentGroupLaunchScene block from the App the toolbar does appear and works as expected - but of course the App's DocumentGroupLaunchScene customizations are lost.
I've tested this on 18.0 devices, as well as production 18.0 and 18.1 beta 6 simulators.
If I modify the StoryView by wrapping the content in a NavigationStack I can make some progress - but the results are unstable and hard to pin down - with this change the first time a document is opened in the WritingApp the toolbar appears as expected. When opening a document subsequently the toolbar is corrupted.
Please is this a bug or is there a good example of incorporate both DocumentGroupLaunchScene customizations at the App level and retina the toolbar in documents presented via DocumentGroup?
Topic:
UI Frameworks
SubTopic:
SwiftUI
In tvOS 18 the onMoveCommand is missing the first press after a view is loaded and every time the direction is changed. It also misses the first press on a button after a focus change. This appears to only impact the newer silver remote and not the older black remote or IR remotes.
With the code bellow press any direction 3 times and it will only log twice.
struct ButtonTest: View {
var body: some View {
VStack {
Button {
debugPrint("button 1")
} label: {
Text("Button 1")
}
Button {
debugPrint("button 2")
} label: {
Text("Button 2")
}
Button {
debugPrint("button 3")
} label: {
Text("Button 3")
}
}
.onMoveCommand(perform: { direction in
debugPrint("move \(direction)")
})
.padding()
}
}
Seeing an issue in iOS 26.2 iPhone 17 simulator (haven't been able to reproduce on device or other simulators), where a view's state is reset after an alert is shown.
In this example the first LibraryView has the issue when alert is shown, the second LibraryView maintains state as expected.
struct ContentView: View {
var body: some View {
NavigationStack {
List {
VStack {
LibraryView(title: "Show view (Loss of state)")
}
LibraryView(title: "Show view (Works as expected)")
}
}
}
}
/// This view is from a package dependency and wants to control the presentation of the sheet internally
public struct LibraryView: View {
@State private var isPresented: Bool = false
let title: String
public init(title: String) {
self.title = title
}
public var body: some View {
Button(self.title) {
self.isPresented = true
}
.sheet(isPresented: self.$isPresented) {
ViewWithAlert()
}
}
}
private struct ViewWithAlert: View {
@State private var isPresented: Bool = false
@State private var presentedCount = 0
var body: some View {
Button("Show Alert, count: \(presentedCount)") {
isPresented = true
presentedCount += 1
}
.alert("Hello", isPresented: self.$isPresented) {
Button("OK") { }
}
}
}
Any ideas?
The issue can be corrected by moving the .sheet to a higher level within the layout (i.e. on the NavigationStack). However, the library wants to control that presentation and not require the integration to present the sheet.
Topic:
UI Frameworks
SubTopic:
SwiftUI
I'm trying to piece together how I should reason about multiple windows, activating menus and items.
For instance, I have an email command. If a document is open, it emails just that document. If the collection view holding that document is open, it generates an attachment representing the collection. (this happens with buttons right now but this really feels like a menu item) How do I tell which window is active (document/collection) in order to have the right menu item available.
If the user is adding a document I don't want the "new" command open, I only want one editing view. I saw sample code to include or remove commands but not disable them. I feel like there's a whole conceptual layer I want to understand with the interplay with scenes but don't know where to look for documentation. I searched here but there's hardly any threads on this.
TIA
Topic:
UI Frameworks
SubTopic:
UIKit
I am trying to implement "Live activity" to my app. I am following the Apple docs.
Link: https://developer.apple.com/documentation/activitykit/displaying-live-data-with-live-activities
Example code:
struct LockScreenLiveActivityView: View {
let context: ActivityViewContext<PizzaDeliveryAttributes>
var body: some View {
VStack {
Spacer()
Text("\(context.state.driverName) is on their way with your pizza!")
Spacer()
HStack {
Spacer()
Label {
Text("\(context.attributes.numberOfPizzas) Pizzas")
} icon: {
Image(systemName: "bag")
.foregroundColor(.indigo)
}
.font(.title2)
Spacer()
Label {
Text(timerInterval: context.state.deliveryTimer, countsDown: true)
.multilineTextAlignment(.center)
.frame(width: 50)
.monospacedDigit()
} icon: {
Image(systemName: "timer")
.foregroundColor(.indigo)
}
.font(.title2)
Spacer()
}
Spacer()
}
.activitySystemActionForegroundColor(.indigo)
.activityBackgroundTint(.cyan)
}
}
Actually, the code is pretty straightforward. We can use the timerInterval for count-down animation. But when the timer ends, I want to update the Live Activity view. If the user re-opens the app, I can update it, but what happens if the user doesn't open the app? Is there a way to update the live activity without using push notifications?
Basic Information
Please provide a descriptive title for your feedback:
Sheet presentationDetents breaks after rapid open/dismiss cycles
Which platform is most relevant for your report?
iOS
Description
Steps to Reproduce:
Create a sheet with presentationDetents([.medium])
Rapidly perform these actions multiple times (usually 3-4 times):
a. Open the sheet
b. Immediately scroll down to dismiss
Open the sheet again
Observe that the sheet now appears at .large size, ignoring the .medium detent
Expected Result:
Sheet should consistently maintain .medium size regardless of how quickly
it is opened and dismissed.
Actual Result:
After rapid open/dismiss cycles, the sheet ignores .medium detent and
appears at .large size.
Reproduction Rate:
Occurs consistently after 3-4 rapid open/dismiss cycles
More likely to occur with faster open/dismiss actions
Configuration:
iOS 18
Xcode 16.0 (16A242d)
SwiftUI
Device: iPhone 14
I'm working on a NavigationStack based app. Somewhere I'm using:
@Environment(\.dismiss) private var dismiss
and when trying to navigate to that view it gets stuck.
I used Self._printChanges() and discovered the environment variable dismiss is changing repeatedly. Obviously I am not changing that variable explicitly. I wasn't able to reproduce this in a small project so far, but does anybody have any idea what kind of thing I could be doing that might be causing this issue?
iOS 17.0.3
Xcode downloaded a crash report for my app which I don't quite understand. It seems the following line caused the crash:
myEntity.image = newImage
where myEntity is of type MyEntity:
class MyEntity: NSObject, Identifiable {
@objc dynamic var image: NSImage!
...
}
The code is called on the main thread. According to the crash report, thread 0 makes that assignment, and at the same time thread 16 is calling [NSImageView asynchronousPreparation:prepareResultUsingParameters:].
What could cause such a crash? Could I be doing something wrong or is this a bug in macOS?
crash.crash
The following code won't work:
- (void)windowDidLoad {
[super windowDidLoad];
self.window.isVisible = NO;
}
The only main window still shows on application startup (in a minimal newly created app).
One of my published apps in App Store relies on this behavior which had been working for many years since I started Xcode development.
Topic:
UI Frameworks
SubTopic:
AppKit
I have set up a collection view cell programmatically which I am registering in the cell registration of a diffable data source. I have set up a delegate for the cell, and the view controller which contains the collection view as the delegate for the cell. However, calling the cell delegate method from the cell is not calling the method in the view controller.
This is my code:
`// in my view controller: cell.delegate = self
// in my collection view cell: delegate?.repromptLLMForIconName(iconName, index: index, emotion: emotion, red: red, green: green, blue: blue)
`
But although the delegate method in the collection view gets called, my method implementation in the view controller does not. What could possibly be going wrong?
Topic:
UI Frameworks
SubTopic:
UIKit
Is there a way to access an Icon Composer .icon file in Swift or Objective-C? Any way to get this in an NSImage object that I can display in an image view? Thanks.
If I delete Safari and only have another browser installed on my device, UIApplication.shared.open does not work. I think this is a bug. Why would it not work?
If Safari is not the main browser, UIApplication would open the URL in my main browser.
Those are valid use cases.
I would expect this API to work with any browser...
iOS 26.2
iPhone 14 Pro
guard let url = URL(string: "https://www.apple.com") else {
return
}
if UIApplication.shared.canOpenURL(url) {
UIApplication.shared.open(url)
} else {
print("Could not open URL")
}
Topic:
UI Frameworks
SubTopic:
UIKit
Hi folks,
there's currently a known issue in TipKit due to which it won't show popover tips on buttons that are inside a SwiftUI ToolbarItem. For example, if you try this code, the popover tip will not appear:
ToolbarItem {
Button(action: {...}) {
Label("Tap here", systemImage: "gear")
}
.popoverTip(sampleTip)
}
There's an easy workaround for this issue. Just apply a style to the button. It can be any style. Some examples are bordered, borderless, plain and borderedProminent. Here's a fixed version of the above code:
ToolbarItem {
Button(action: {...}) {
Label("Tap here", systemImage: "gear")
}
.buttonStyle(.plain) // Adding this line fixes the issue.
.popoverTip(sampleTip)
}
Hope this helps anyone running into this issue.
Have a data model that sets certain fields as unique. If the user attempts to save a duplicate value, the save fails quietly with no indication to the user that the save failed. The program is on Mac OS 26.0.1
@Environment(\.modelContext) var modelContext
@Query private var typeOfContracts: [TypeOfContract]
@State private var typeName: String = ""
@State private var typeCode: String = ""
@State private var typeDescription: String = ""
@State private var contracts: [Contract] = []
@State private var errorMessage: String? = "Data Entered"
@State private var showAlert: Bool = false
var body: some View {
Form {
Text("Enter New Contract Type")
.font(.largeTitle)
.foregroundStyle(Color(.green))
.multilineTextAlignment(.center)
TextField("Contract Type Name", text: $typeName)
.frame(width: 800, height: 40)
TextField("Contract Type Code", text: $typeCode)
.frame(width: 800, height: 40)
Text("Contract Type Description")
TextEditor(text: $typeDescription)
.frame(width: 800, height: 200)
.scrollContentBackground(.hidden)
.background(Color.teal)
.font(.system(size: 24))
Button(action: {
self.saveContractType()
})
{
Text("Save new contract type")
}
}
}
func saveContractType() {
let typeOfContract = TypeOfContract(contracts: [])
typeOfContract.typeName = typeName
typeOfContract.typeCode = typeCode
typeOfContract.typeDescription = typeDescription
modelContext.insert(typeOfContract)
do {
try modelContext.save()
}catch {
errorMessage = "Error saving data: \(error.localizedDescription)"
}
}
}
I have tried to set alerts but Xcode tells me that the alerts are not in scope
All of these issues appear when the search controller is set on the view controller's navigationItem and the search controller's searchBar has its scopeButtonTitles set.
So far the following issues are affecting my app on iOS/iPadOS 26 as of beta 7:
When the scopeBarActivation of UISearchController is set to .onSearchActivation, the preferredSearchBarPlacement of the navigationItem is set to .integratedButton, and the searchBarPlacementAllowsToolbarIntegration is set to false (forcing the search icon to appear in the nav bar), on both iPhones and iPads, the scope buttons never appear. They don't appear when the search is activated. They don't appear when any text is entered into the search bar. FB19771313
I attempted to work around that issue by setting the scopeBarActivation to .manual. I then show the scope bar in the didPresentSearchController delegate method and hide the scope bar in the willDismissSearchController. On an iPhone this works though the display is a bit clunky. On an iPad, the scope bar does appear via the code in didPresentSearchController, but when any scope bar button is tapped, the search controller is dismissed. This happens when the app is horizontally regular. When the app on the iPad is horizontally compact, the buttons work but the search bar's text is not correctly aligned within the search bar. Quite the mess really. I still need to post a bug report for this issue. But if issue 1 above is fixed then I don't need this workaround.
When the scopeBarActivation of UISearchController is set to .onSearchActivation, the preferredSearchBarPlacement of the navigationItem is set to .stacked, and the hidesSearchBarWhenScrolling property of the navigationItem is set to false (always show the search bar), and this is all used in a UITableViewController, then upon initial display of the view controller on an iPhone or iPad, you are unable to tap on the first row of the table view except on the very bottom of the row. The currently hidden scope bar is stealing the touches. If you activate and then cancel the search (making the scope bar appear and then disappear) then you are able to tap on the first row as expected. The initially hidden scope bar also bleeds through the first row of the table. It's faint but you can tell it's not quite right. Again, this is resolved by activating and then canceling the search once. FB17888632
When the scopeBarActivation of UISearchController is set to .onSearchActivation, the preferredSearchBarPlacement of the navigationItem is set to integrated or .integratedButton, and the toolbar is shown, then on iPhones (where the search bar/icon appears in the toolbar) the scope buttons appear (at the top of the screen) the first time the search is activated. But if you cancel the search and then activate it again, the search bar never appears a second (or later) time. On an iPad the search bar/icon appears in the nav bar and you end up with the same issue as #1 above. FB17890125
Issues 3 and 4 were reported against beta 1 and still haven't been fixed. But if issue 1 is resolved on iPhone, iPad, and Mac (via Mac Catalyst), then I personally won't be affected by issues 2, 3, or 4 any more (but of course all 4 issues need to be fixed). And by resolved, I mean that the scope bar appears and disappears when it is supposed to each and every time the search is activated and cancelled (not just the first time). The scope bar doesn't interfere with touch events upon initial display of the view controller. And there are no visual glitches no matter what the horizontal size class is on an iPad.
I really hope the UIKit team can get these resolved before iOS/iPadOS 26 GM.
Dear Apple Developer Support,
We found that on devices running iOS 26.1 Beta, if we set the separator style of a UITableView to None via xib, the setting will have no effect and the table view cells will show separators.
To reproduce this issue, I created a simple project. Please refer to the following screenshots.
On iOS 26.0, no separator is showing.
However on iOS 26.1, separators are showing.
We have already filed a bug report FB20365301. We'd like to know if this is a bug and if it will be fixed before iOS 26.1 is officially released.
Thank you.
Topic:
UI Frameworks
SubTopic:
UIKit
When I build my app for iPad OS, either 26, or 18.5, as well as iOS on 16.5 from Xcode 26 with UIDesignRequiresCompatibility enabled my app is crashing as it loads the main UIViewController, a subclassed UITabBarController which is being loaded programatically from a Storyboard from another SplashScreen ViewController.
On i(Pad)OS 18.5 I get this error:
Thread 1: "Could not instantiate class named _TtGC5UIKit17UICoreHostingViewVCS_21ToolbarVisualProvider8RootView_ because no class named _TtGC5UIKit17UICoreHostingViewVCS_21ToolbarVisualProvider8RootView_ was found; the class needs to be defined in source code or linked in from a library (ensure the class is part of the correct target)"
On iPadOS 26 I get this error:
UIKitCore/UICoreHostingView.swift:54: Fatal error: init(coder:) has not been implemented
There is no issue building from Xcode 16.4, regardless of targeted i(Pad)OS.