I have the following function private func SetupLocaleObserver () { NotificationCenter.default.addObserver ( forName: NSLocale.currentLocaleDidChangeNotification, object: nil, queue: .main ) {_ in print ("Locale changed to: \(Locale.current.identifier)"); } } I call this function inside the viewDidLoad () method of my view controller. The expectation was that whenever I change the system or app-specific language preference, the locale gets changed, and this change triggers my closure which should print "Locale changed to: " on the console. However, the app gets terminated with a SIGKILL whenever I change the language from the settings. So, it is observed that sometimes my closure runs, while most of the times it does not run - maybe the app dies even before the closure is executed. So, the question is, what is the use of this particular notification if the corresponding closure isn't guaranteed to be executed before the app dies? Or am I using it the wrong way?

Is it not possible to dynamically change or constrain an NSPreferencePane's mainView size? I have looked all over and this doesn't seem to be mentioned anywhere. The most I can seemingly do is set the frame and hope the user doesn't resize the window. class scor: NSPreferencePane { override func mainViewDidLoad() { mainView = NSHostingView(rootView: ContentView()) mainView.frame = NSMakeRect(0, 0, 668, 1048) } } Here is a screenshot, just with a simple webview as a test, note the scrollbar: My storyboard is just from the default prefpane Xcode template, nothing special. I looked at the header file for NSPreferencePane and came up with nothing. All I can think of is that this is impossible due to the way they are implemented? The only thing we seemingly have access to is mainView, so I can't like constrain the size of mainView to its parent, for example. Additionally, if I make a new preference pane, and make a button or other view that I choose to resize to fill horizontally and vertically, it does that, but not really? Here is what that looks like: The behaviour is similar to the previous preference pane, the width does adapt correctly, the height stays the same, forever. Not that it really matters but I am using macOS 14.7.6 on an M2 air

Hello I'm currently upgrading an app because said app age requieres an upgrade and I've started a new empty project, when I get to the printing functionality after som weeks of work to my demise I can't get it to work, in essence my code looks like this: let vista = NSView() vista.setFrameSize(NSSize(width: 400, height: 800)) let operacion = NSPrintOperation(view: vista) operacion.run() But I just get this system warning, "This application does not support printing." I´ve had checked the printing option in the project sandbox, and even deleted the sandbox itself with the same result. I even created a new empty project with this sole function with the same result but if I make a new project with a different name it works without a hitch, this error only occurs with projects with the same bundle identifier as my old app. I am a lost with this issue and I greatly appreciate any help. Thanks

How can i achieve the same behavior as the bottom bar on the Mail app? Button -> Search Field -> Button right now, if do as follows, they overlap as if they are not in the same space NavigationStack { VStack { HeaderView() ListView() } } .toolbar(.hidden, for: .tabBar) .searchable(text: $searchText) .searchToolbarBehavior(.minimize) .toolbar { ToolbarItem(placement: .bottomBar) { Button { } label: { Label("Button1", systemImage: "person") } } ToolbarItem(placement: .bottomBar) { Button { } label: { Label("Button2", systemImage: "person") } } }

In iOS 26, the mini keyboard bar does not consistently appear when typing with a hardware keyboard. This behavior differs from iOS 18, where the bar was always visible. See screenshots:

struct ContentView: View { @State var visable: Bool = false @State var visableHiddenMenu: Bool = false var body: some View { VStack { Button("xxxx") { visableHiddenMenu = true print("visableHiddenMenu \(visableHiddenMenu)") visable.toggle() } .popover(isPresented: $visable) { VStack { let _ = print("visableHiddenMenu2 \(visableHiddenMenu)") Text("xxxx") } .onAppear { print("appear \(visableHiddenMenu)") visableHiddenMenu = visableHiddenMenu } } } .padding() } } the print is visableHiddenMenu true visableHiddenMenu2 false appear true so why visableHiddenMenu2 print false?

I have a dark background and the initial look of the nav bar is showing like there is a light background. See picture. Has anyone experienced this or know of a solution? If I scroll the table up, it will fix itself and start behaving as I'd expect.

Does the new TextEditor in iOS 26, which supports rich text / AttributedString, also support the ability to add text attachments or tokens? For example, in Xcode, we can type <#foo#> to create an inline text placeholder/token which can be interacted with in a different way than standard text.

Our app displays complex, data-driven layouts that can display grids of items in addition to full width rows (essentially, nested lists). We'd like to be able to preserve cell/item portability (i.e., display in any content strip) and allow them to carry capabilities like swipe actions. In UIKit we have features in compositional layout that allow for this. However, in SwiftUI the only support seems to be at the List level. Nesting a List within a ScrollView to get swipe actions feels like a dark road. We've rolled our own swipe actions system, but we'd much rather use a native solution. Any other options here? Improvement ticket here FB17994843.

When I run my iOS app on a Mac using Mac Catalyst, several sharing options that show up on an iOS device in a share sheet are absent on the Mac. Clicking on Edit Extensions, I see Mail, Message and AirDrop, their switches are on and disabled. All three items show up when I share from Safari or Notes. How can I make Mail, Message and AirDrop available? For example, when sharing data, no share extensions are shown. For text, only Simulator, Shortcuts and Copy are shown.

How to make a control that looks and feels as close as possible to NSPopUpButton in SwiftUI, so a Mac user accepts the control as being native Mac UI? Items should have icon and text, I need separators between some items and certain items may be disabled at times, so they should not be selectable. Picker seems to lack some of those features (separators and disabled items), and Menu looks and behaves differently. Any guidance? For now I went with Menu, but find both the "chevron.down" icon at the trailing end as well as the positioning of the menu below the control weird.

Generic parameter 'V' could not be inferred ERROR

Is there any way to influence the corner radius of a selection in the list? Looking at the native Apple Mail app in the iOS 26, it should be.

In order to create a UITextView like that of the Messages app whose height grows to fits its contents (number of lines), I subclassed UITextView and customized the intrinsicContentSize like so: override var intrinsicContentSize: CGSize { var size = super.intrinsicContentSize if size.height == UIView.noIntrinsicMetric { layoutManager.glyphRange(for: textContainer) size.height = layoutManager.usedRect(for: textContainer).height + textContainerInset.top + textContainerInset.bottom } return size } As noted at WWDC, accessing layoutManager will force TextKit 1, we should instead use textLayoutManager. How can this code be migrated to support TextKit 2?

struct ContentView: View { var body: some View { NavigationSplitView { List { Text("row 1") Text("row 2") Text("row 3") } .toolbar(content: { ToolbarItem { Button("aa", action: onToolbar) } }) } detail: { HSplitView { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Hello, world!") } .toolbar(id: "toolbar", content: { ToolbarItem(id: "toolbar-1") { Button("bb", action: onToolbar) } }) .padding() Text("right") } }.navigationTitle("") } func onToolbar() {} } Run & Crash NSToolbar 0x6000005665b0 already contains an item with the identifier com.apple.SwiftUI.splitViewSeparator-0. Duplicate items of this type are not allowed.

I'm developing an app that uses the SwiftUI .photosPicker modifier to allow the user to open videos from their photos. While many videos successfully load, one video results in the following errors occurring: Error loading com.apple.quicktime-movie: <decode: bad range for [%@] got [offs:100 len:1229 within:0]> Error loading public.movie: <decode: bad range for [%@] got [offs:87 len:1229 within:0]> "The operation couldn’t be completed. (CoreTransferable.TransferableSupportError error 0.)" I was able to isolate the line of code within the Transferable where this occurs to be the following: try FileManager.default.copyItem(at: received.file, to: destination) Is there something that I can do to ensure the app can reliably open any video? The entire transferable struct is as follows: import Foundation import CoreTransferable import UniformTypeIdentifiers struct Video: Transferable { let url: URL let filename: String static var transferRepresentation: some TransferRepresentation { FileRepresentation(contentType: .mpeg4Movie) { video in SentTransferredFile(video.url) } importing: { received in try Video.transfer(from: received) } FileRepresentation(contentType: .quickTimeMovie) { video in SentTransferredFile(video.url) } importing: { received in try Video.transfer(from: received) } FileRepresentation(contentType: .avi) { video in SentTransferredFile(video.url) } importing: { received in try Video.transfer(from: received) } FileRepresentation(contentType: .mpeg) { video in SentTransferredFile(video.url) } importing: { received in try Video.transfer(from: received) } FileRepresentation(contentType: .mpeg2Video) { video in SentTransferredFile(video.url) } importing: { received in try Video.transfer(from: received) } FileRepresentation(contentType: .video) { video in SentTransferredFile(video.url) } importing: { received in try Video.transfer(from: received) } FileRepresentation(contentType: .movie) { video in SentTransferredFile(video.url) } importing: { received in try Video.transfer(from: received) } } static func transfer(from received: ReceivedTransferredFile) throws -> Video { let destination = FileManager.default.temporaryDirectory.appendingPathComponent(received.file.lastPathComponent) if FileManager.default.fileExists(atPath: destination.path) { try FileManager.default.removeItem(at: destination) } try FileManager.default.copyItem(at: received.file, to: destination) return Video(url: destination, filename: received.file.lastPathComponent) } }

import UIKit class ViewController: UIViewController { var panGesture = UIPanGestureRecognizer() override func viewDidLoad() { super.viewDidLoad() panGesture.isEnabled = true panGesture.minimumNumberOfTouches = 0 panGesture.maximumNumberOfTouches = 5 panGesture.allowedScrollTypesMask = .continuous panGesture.addTarget(self, action: #selector(gestureUpdate(_:))) view.addGestureRecognizer(panGesture) } @objc private func gestureUpdate(_ gesture: UIPanGestureRecognizer) { print("OS: \(osVersion), date: \(Date.now), numberOfTouches: \(gesture.numberOfTouches)") } private var osVersion: String { let osVersion = ProcessInfo.processInfo.operatingSystemVersion return "\(osVersion.majorVersion).\(osVersion.minorVersion).\(osVersion.patchVersion)" } } it's hard to recognize 3 or more fingers gesture on iPadOS26.

I'm using SwiftUI's TextEditor. I'd like to include an undo button in my UI that operates on the TextEditor. I don't see a way to hook this up. You can get the UndoManager from the environment, but this is not the undo manager the TextEditor is using. I know that UITextView uses an undocumented UndoManager (_UITextUndoManager) and I've accessed that before when using a UIViewRepresentable wrapper around UITextView. I'd like to achieve the same with TextEditor.

Glad to see that we have the capability to edit rich text in TextEditor with the latest os update, but I didn't get any clue to enable the attachment for this textEditor, either image/audio/video or other attachments. Any solution on this with TextEditor or I have to use the UIKit and AppKit alternatives?

When using a .zoom navigation transition, where .matchedTransitionSource is applied to a button in a toolbar and the destination view is a sheet which is presented with PresentationDetent.medium, the transition works initially, but shortly after it completes, the sheet's background is dimmed and the text of the source button reappears abruptly. Code and a screenshot are below, though the effect is best observed when interacting with the view. // // ContentView.swift // ZoomNavigationTransitionSample // // Created by Matthew DuBois on 6/15/25. // import SwiftUI struct ContentView: View { @State private var isPresentingSheet = false @Namespace private var namespace var body: some View { NavigationStack { List { Text("Some content") } .navigationTitle("Sample") .toolbar { ToolbarItem(placement: .topBarTrailing) { Button("Button") { isPresentingSheet = true } .matchedTransitionSource(id: "button", in: namespace) } } .sheet(isPresented: $isPresentingSheet) { Text("Some sheet content") .navigationTransition(.zoom(sourceID: "button", in: namespace)) .presentationDetents([.medium]) } } } } #Preview { ContentView() }