Environment • Device: iOS 26 Developer Beta 5 (23A5308g) • Xcode: 16.3 Short description The app crashes the moment the user tries to long-press to select text inside a WKWebView, double-tap an image with Text (magnifier appears) The exception is CALayer position contains NaN. frame = (nan,0;0,48) chorPoint=(inf, 0) and it is thrown in the UI process. Build & run any project that hosts a WKWebView. Inject the following CSS via script (this is what we do to suppress the native callout menu): WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:[WKWebViewConfiguration new]]; NSString *js = @"document.documentElement.style.webkitUserSelect='none';" "document.documentElement.style.webkitTouchCallout='none';"; [webView evaluateJavaScript:js completionHandler:nil]; [self.view addSubview:webView]; Incident Identifier: EE6FB046-5087-4F15-A72D-A74965347A30 CrashReporter Key: 29e8e58e02a07557adb4ce3f463d764f3ce8bbd5 Hardware Model: iPhone16,1 Process: wallet [642] Path: /private/var/containers/Bundle/Application/4B4E609A-C8BF-4C56-AB2A-1638249B98A5/wallet.app/wallet Identifier: xxxx Version: xxxx AppStoreTools: 16F7 AppVariant: 1:iPhone16,1:18 Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: xxxxx Date/Time: 2025-08-06 12:05:24.0732 +0800 Launch Time: 2025-08-06 11:49:40.3802 +0800 OS Version: iPhone OS 26.0 (23A5308g) Release Type: Beta Baseband Version: 3.02.02 Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: SIGNAL 6 Abort trap: 6 Terminating Process: wallet [642] Triggered by Thread: 0 Application Specific Information: abort() called Last Exception Backtrace: 0 CoreFoundation 0x185e058c8 __exceptionPreprocess + 164 1 libobjc.A.dylib 0x182d797c4 objc_exception_throw + 88 2 CoreFoundation 0x185e908d4 -[NSException initWithCoder:] + 0 3 QuartzCore 0x18678a874 CA::Layer::set_position(CA::Vec2<double> const&, bool) + 160 4 QuartzCore 0x1869a7270 -[CALayer setPosition:] + 52 5 UIKitCore 0x18c4ac564 -[UIView _backing_setPosition:] + 176 6 UIKitCore 0x18cefdf0c -[UIView setCenter:] + 220 7 UIKitCore 0x18cd9f794 -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] + 936 8 UIKitCore 0x18cd9f3c0 __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke + 104 9 UIKitCore 0x18ced1060 -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] + 384 10 UIKitCore 0x18cd9f2e4 -[_UIEditMenuContentPresentation _displayMenu:reason:] + 304 11 UIKitCore 0x18cd9f0d8 -[_UIEditMenuContentPresentation displayMenu:configuration:] + 64 12 UIKitCore 0x18ced0344 __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke + 260 13 UIKitCore 0x18ced1f8c __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke + 80 14 UIKitCore 0x18cc8403c __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke + 180 15 UIKitCore 0x18cc84584 __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke + 148 16 WebKit 0x1a05ae5d4 WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>::operator()(WebKit::DocumentEditingContext&&) + 64 17 WebKit 0x1a05bb468 WTF::Detail::CallableWrapper<WTF::CompletionHandler<void (IPC::Connection*, IPC::Decoder*)> IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>>(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 196 18 WebKit 0x19fcf5db8 WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<IPC::ConnectionAsyncReplyHandler>, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 64 19 WebKit 0x19fce54f0 IPC::Connection::dispatchMessage(WTF::UniqueRef<IPC::Decoder>) + 340 20 WebKit 0x19fcf5aa0 IPC::Connection::dispatchIncomingMessages() + 536 21 JavaScriptCore 0x19a8f85d4 WTF::RunLoop::performWork() + 552 22 JavaScriptCore 0x19a8f838c WTF::RunLoop::performWork(void*) + 36 23 CoreFoundation 0x185da6230 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 24 CoreFoundation 0x185da61a4 __CFRunLoopDoSource0 + 172 25 CoreFoundation 0x185d83c6c __CFRunLoopDoSources0 + 232 26 CoreFoundation 0x185d598b0 __CFRunLoopRun + 820 27 CoreFoundation 0x185d58c44 _CFRunLoopRunSpecificWithOptions + 532 28 GraphicsServices 0x224ce0498 GSEventRunModal + 120 29 UIKitCore 0x18b6c84b8 -[UIApplication _run] + 792 30 UIKitCore 0x18b66cbc0 UIApplicationMain + 336 31 wallet 0x1046f8558 0x1046f4000 + 17752 32 dyld 0x182dcdb18 start + 6332

Hi, we are trying to move an existing application to a Web based SPA architecture with majority of the screens written in JS opening in a webview and using native bridges for the Hardware components. Before proceeding ahead, we just wanted to be sure that these kinds of applications are generally approved by Apple or not. If not, what are the guidelines to be followed if one wants to create an SPA application for iOS. PS: The content that will be served in web view would be controlled and hosted within the organisation domain and whitelisted for the mobile app only.

I'm developing a cross-platform application using Tauri, which uses WebView technology as the GUI renderer. On macOS, it should be using WKWebView. Based on my tests, all applications developed with Tauri can only run at 60fps on macOS and cannot take advantage of ProMotion displays to achieve a 120fps refresh rate, whereas the same application can run at 120fps on other platforms. I have submitted this issue to Tauri on GitHub, and it appears that this cannot be resolved through external settings, but only by modifying the WKWebView code to support higher frame rates. Is there any possible solution to this?

WKWebView has set the option to disable selection ("document. documentElement. style. webkitUserSelect='none ';") and long press ("document. documentElement. style. webkitTouchCallout='none';"). If there is text on one of the images in WebView, simply tap the image twice and then long press the text. The program will crash with the following error message: 0 CoreFoundation 0x185e058c8 __exceptionPreprocess + 164 1 libobjc.A.dylib 0x182d797c4 objc_exception_throw + 88 2 CoreFoundation 0x185e908d4 -[NSException initWithCoder:] + 0 3 QuartzCore 0x18678a874 CA::Layer::set_position(CA::Vec2<double> const&, bool) + 160 4 QuartzCore 0x1869a7270 -[CALayer setPosition:] + 52 5 UIKitCore 0x18c4ac564 -[UIView _backing_setPosition:] + 176 6 UIKitCore 0x18cefdf0c -[UIView setCenter:] + 220 7 UIKitCore 0x18cd9f794 -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] + 936 8 UIKitCore 0x18cd9f3c0 __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke + 104 9 UIKitCore 0x18ced1060 -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] + 384 10 UIKitCore 0x18cd9f2e4 -[_UIEditMenuContentPresentation _displayMenu:reason:] + 304 11 UIKitCore 0x18cd9f0d8 -[_UIEditMenuContentPresentation displayMenu:configuration:] + 64 12 UIKitCore 0x18ced0344 __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke + 260 13 UIKitCore 0x18ced1f8c __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke + 80 14 UIKitCore 0x18cc8403c __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke + 180 15 UIKitCore 0x18cc84584 __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke + 148 16 WebKit 0x1a05ae5d4 WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>::operator()(WebKit::DocumentEditingContext&&) + 64 17 WebKit 0x1a05bb468 WTF::Detail::CallableWrapper<WTF::CompletionHandler<void (IPC::Connection*, IPC::Decoder*)> IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>>(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 196 18 WebKit 0x19fcf5db8 WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<IPC::ConnectionAsyncReplyHandler>, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 64 19 WebKit 0x19fce54f0 IPC::Connection::dispatchMessage(WTF::UniqueRef<IPC::Decoder>) + 340 20 WebKit 0x19fcf5aa0 IPC::Connection::dispatchIncomingMessages() + 536 Will the official version have this issue?

Trying to implement my own forward/back buttons for the new SwiftUI WebView and reading the documentation I’m totally lost. What’s the recommended way of implementing forward/back behavior with this component?

Environment • Device: any iPhone running iOS 26 Developer Beta 5 (23A5308g) • Xcode: 16.3 Short description The app crashes the moment the user tries to long-press to select text inside a WKWebView, double-tap an image with Text (magnifier appears) The exception is CALayer position contains NaN. frame = (nan,0;0,48) chorPoint=(inf, 0) and it is thrown in the UI process. Build & run any project that hosts a WKWebView. Inject the following CSS via script (this is what we do to suppress the native callout menu): WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:[WKWebViewConfiguration new]]; NSString *js = @"document.documentElement.style.webkitUserSelect='none';" "document.documentElement.style.webkitTouchCallout='none';"; [webView evaluateJavaScript:js completionHandler:nil]; [self.view addSubview:webView]; Incident Identifier: EE6FB046-5087-4F15-A72D-A74965347A30 CrashReporter Key: 29e8e58e02a07557adb4ce3f463d764f3ce8bbd5 Hardware Model: iPhone16,1 Process: wallet [642] Path: /private/var/containers/Bundle/Application/4B4E609A-C8BF-4C56-AB2A-1638249B98A5/wallet.app/wallet Identifier: xxxxxxx Version: xxxx AppStoreTools: 16F7 AppVariant: 1:iPhone16,1:18 Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: xxxxxx Date/Time: 2025-08-06 12:05:24.0732 +0800 Launch Time: 2025-08-06 11:49:40.3802 +0800 OS Version: iPhone OS 26.0 (23A5308g) Release Type: Beta Baseband Version: 3.02.02 Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: SIGNAL 6 Abort trap: 6 Terminating Process: wallet [642] Triggered by Thread: 0 Application Specific Information: abort() called Thread 0 Crashed: 0 libsystem_kernel.dylib 0x22da0f0cc __pthread_kill + 8 1 libsystem_pthread.dylib 0x1e097b7e8 pthread_kill + 268 2 libsystem_c.dylib 0x191361f1c abort + 124 3 libc++abi.dylib 0x182e7a808 __abort_message + 132 4 libc++abi.dylib 0x182e69484 demangling_terminate_handler() + 304 5 libobjc.A.dylib 0x182d7bf28 _objc_terminate() + 156 6 wallet 0x1068ff8c8 0x1046f4000 + 35698888 7 libc++abi.dylib 0x182e79bdc std::__terminate(void (*)()) + 16 8 libc++abi.dylib 0x182e7d314 __cxxabiv1::failed_throw(__cxxabiv1::__cxa_exception*) + 88 9 libc++abi.dylib 0x182e7d2bc __cxa_throw + 92 10 libobjc.A.dylib 0x182d7992c objc_exception_throw + 448 11 CoreFoundation 0x185e908d4 +[NSException raise:format:] + 128 12 QuartzCore 0x18678a874 CA::Layer::set_position(CA::Vec2<double> const&, bool) + 160 13 QuartzCore 0x1869a7270 -[CALayer setPosition:] + 52 14 UIKitCore 0x18c4ac564 -[UIView _backing_setPosition:] + 176 15 UIKitCore 0x18cefdf0c -[UIView setCenter:] + 220 16 UIKitCore 0x18cd9f794 -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] + 936 17 UIKitCore 0x18cd9f3c0 __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke + 104 18 UIKitCore 0x18ced1060 -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] + 384 19 UIKitCore 0x18cd9f2e4 -[_UIEditMenuContentPresentation _displayMenu:reason:] + 304 20 UIKitCore 0x18cd9f0d8 -[_UIEditMenuContentPresentation displayMenu:configuration:] + 64 21 UIKitCore 0x18ced0344 __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke + 260 22 UIKitCore 0x18ced1f8c __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke + 80 23 UIKitCore 0x18cc8403c __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke + 180 24 UIKitCore 0x18cc84584 __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke + 148 25 WebKit 0x1a05ae5d4 WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>::operator()(WebKit::DocumentEditingContext&&) + 64 26 WebKit 0x1a05bb468 WTF::Detail::CallableWrapper<WTF::CompletionHandler<void (IPC::Connection*, IPC::Decoder*)> IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>>(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 196 27 WebKit 0x19fcf5db8 WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<IPC::ConnectionAsyncReplyHandler>, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 64 28 WebKit 0x19fce54f0 IPC::Connection::dispatchMessage(WTF::UniqueRef<IPC::Decoder>) + 340 29 WebKit 0x19fcf5aa0 IPC::Connection::dispatchIncomingMessages() + 536 30 JavaScriptCore 0x19a8f85d4 WTF::RunLoop::performWork() + 552 31 JavaScriptCore 0x19a8f838c WTF::RunLoop::performWork(void*) + 36 32 CoreFoundation 0x185da6230 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 33 CoreFoundation 0x185da61a4 __CFRunLoopDoSource0 + 172 34 CoreFoundation 0x185d83c6c __CFRunLoopDoSources0 + 232 35 CoreFoundation 0x185d598b0 __CFRunLoopRun + 820 36 CoreFoundation 0x185d58c44 _CFRunLoopRunSpecificWithOptions + 532 37 GraphicsServices 0x224ce0498 GSEventRunModal + 120 38 UIKitCore 0x18b6c84b8 -[UIApplication _run] + 792 39 UIKitCore 0x18b66cbc0 UIApplicationMain + 336 40 wallet 0x1046f8558 0x1046f4000 + 17752 41 dyld 0x182dcdb18 start + 6332

Something has changed in iOS 26 and now if custom scheme is used and web page contains scripts WebKit is terminated. 0x1130bc170 - [PID=47858] WebProcessProxy::didClose: (web process 0 crash) 0x1130bc170 - [PID=47858] WebProcessProxy::processDidTerminateOrFailedToLaunch: reason=Crash final class CustomSchemeViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let sampleConfiguration = WKWebViewConfiguration() sampleConfiguration.setURLSchemeHandler( SampleURLSchemeHandler(), forURLScheme: "sample" ) let webView = WKWebView(frame: view.bounds, configuration: sampleConfiguration) webView.autoresizingMask = [.flexibleWidth, .flexibleHeight] view.addSubview(webView) webView.navigationDelegate = self webView.load(URLRequest(url: URL(string: "sample://pages/sample.html")!)) } } extension CustomSchemeViewController: WKNavigationDelegate { func webViewWebContentProcessDidTerminate(_ webView: WKWebView) { print("webViewWebContentProcessDidTerminate") } } final class SampleURLSchemeHandler: NSObject, WKURLSchemeHandler { private func post(_ body: String, mimeType: String, urlSchemeTask: WKURLSchemeTask) { let body = Data(body.utf8) let response = URLResponse( url: urlSchemeTask.request.url!, mimeType: mimeType, expectedContentLength: body.count, textEncodingName: nil ) urlSchemeTask.didReceive(response) urlSchemeTask.didReceive(body) urlSchemeTask.didFinish() } func webView(_ webView: WKWebView, start urlSchemeTask: WKURLSchemeTask) { switch urlSchemeTask.request.url?.lastPathComponent { case "sample.html": post(""" <?xml version="1.0" encoding="UTF-8"?><html xmlns="http://www.w3.org/1999/xhtml"> <head> <script src="/scripts/sample.js"></script> </head> <body> <p>Sample</p> </body> </html> """, mimeType: "application/xhtml+xml", urlSchemeTask: urlSchemeTask ) case "sample.js": post("console.log('Hello from JS File')", mimeType: "text/javascript", urlSchemeTask: urlSchemeTask ) default: assertionFailure() } } func webView(_ webView: WKWebView, stop urlSchemeTask: WKURLSchemeTask) { print("webView(_ webView: WKWebView, stop urlSchemeTask: WKURLSchemeTask)") } } It works fine with css file inside, without script tag or with async attribute Code of sample project https://github.com/Igor-Palaguta/iOS26URLSchemeTermination

How can I make a background image take the entire screen in ios26? I've tried position fixed, sticky, env() css variables but nothing worked. It does it when in PWA mode, but I would like to do so in the browser too.

Hi there! I'm new to App Development and I'm running into the following error when playing audio on a website loaded through a WKWebView: 0x112000cc0 - ProcessAssertion::acquireSync Failed to acquire RBS assertion 'WebKit Media Playback' for process with PID=70.197, error: Error Domain=RBSServiceErrorDomain Code=1 "(originator doesn't have entitlement com.apple.runningboard.assertions.webkit AND originator doesn't have entitlement com.apple.multitasking.systemappassertions)" UserInfo={NSLocalizedFailureReason=(originator doesn't have entitlement com.apple.runningboard.assertions.webkit AND originator doesn't have entitlement com.apple.multitasking.systemappassertions)} Looking through this forum, it seems more people have this issue, yet no one has found a solution (or posted it...). The solutions that I did find (Background Modes capability, webView.configuration.allowsInlineMediaPlayback = true), did nothing. To make sure the issue had nothing to do with my own code, I created an empty project to reproduce the issue. I'm not sure on the best way to share it, but it's a small file (forgive me, I have no clue what it does, actually chatGPT made it for me. My real application is a WebApp wrapped with Capacitor, so it handles all the Swift stuff) import SwiftUI import WebKit struct WebView: UIViewRepresentable { let urlString: String func makeUIView(context: Context) -> WKWebView { let webView = WKWebView() webView.configuration.allowsInlineMediaPlayback = true webView.configuration.allowsAirPlayForMediaPlayback = true webView.navigationDelegate = context.coordinator return webView } func updateUIView(_ uiView: WKWebView, context: Context) { if let url = URL(string: urlString) { let request = URLRequest(url: url) uiView.load(request) } } func makeCoordinator() -> Coordinator { Coordinator(self) } class Coordinator: NSObject, WKNavigationDelegate { var parent: WebView init(_ parent: WebView) { self.parent = parent } func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) { print("Web page loading failed: \(error.localizedDescription)") } } } struct WebViewDemo: View { var body: some View { NavigationView { WebView(urlString: "https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_audio_all") .navigationBarTitle("Web View") } } } struct WebView_Previews: PreviewProvider { static var previews: some View { WebViewDemo() } } Nothing special, right? When I build the app and navigate to a website that has an tag (https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_audio_all). I still see the error when I play the audio. It plays nonetheless, but the error is there. I'm not at all interested in actually playing audio in the background/when the app is closed/suspended. I just want the error to go away! I've tried different iOS versions (14,15,16,17), but the problem persists. Anyone know what's happening?

Hi! I configure proxy for webview like DispatchQueue.main.async { self.webView.configuration.websiteDataStore.proxyConfigurations = [proxyConfiguration] } It is fine in iosiOS 17 however, it crashes in iOS 18.3. And the problem seems to be related to the left side of the equation. I tried to call print(self.webView.configuration.websiteDataStore.proxyConfigurations.count) in async block and got the same bad access error. But if stop at that line of code and call po self.webView.configuration.websiteDataStore.proxyConfigurations in debugger it returns 0 elements. Did anyone have the same problem? What may cause the exception?

hello, My organization has an outlook add-in that requires auth into our platform. As Microsoft forces Auth on MacOS to use WKWebView https://learn.microsoft.com/en-us/office/dev/add-ins/concepts/browsers-used-by-office-web-add-ins, we are running into a situation that we cannot use passkeys as an auth method as we are unable to trigger WebAuthN flows. We’ve raised this in Microsoft side but they have deferred to Apple given WKWebView is Safari based. This is a big blocker for us to achieve a full passwordless future. Has anyone come across this situation? Thank you.

Hi everyone, I’m currently working on a UITableView setup that uses UITableViewDiffableDataSource. Each cell contains two views: A UILabel for a title A WKWebView that loads dynamic HTML content My Current Approach: On initial load, I let all cells render with default height. As each WKWebView finishes loading, I calculate its content height using JavaScript and store this height in a [String: CGFloat] dictionary keyed by a unique identifier for each WebView. I then call tableView.performBatchUpdates to trigger a layout update and resize the cell. When the same cell index and data are shown again, I retrieve the cached height from the dictionary and apply it as a constraint on the WKWebView before loading its content. This mostly works, but occasionally, there are visual glitches — such as flickering during scrolling or incorrect cell heights temporarily shown before the height is re-applied. My Questions: Is this a recommended or sustainable way for handling WKWebView inside a UITableViewCell, especially with DiffableDataSource? Are there any known best practices or alternatives to manage dynamic web content heights more smoothly in table cells? Is it possible that the glitches are caused by layout timing issues or reentrancy of height calculation and rendering? Any suggestions, refinements, or architectural recommendations would be greatly appreciated. Thanks in advance!

We are building a hybrid iOS app using Angular (web) rendered inside a WKWebView, hosted by a native Swift app. Communication between the Angular UI and native Swift code is done using WKScriptMessageHandler. The app mostly works without issues, but in rare edge cases, we’re seeing crashes on the main thread, and the crash is reported in Firebase Crashlytics. The root cause appears related to CFRelease and WKScriptMessageHandler. Here’s the relevant crash stack: Crashed: com.apple.main-thread 0 CoreFoundation 0xbfac CFRelease + 44 1 CoreFoundation 0xa734 __CFURLDeallocate + 128 2 CoreFoundation 0x730c _CFRelease + 292 3 libobjc.A.dylib 0x4e28 AutoreleasePoolPage::releaseUntil(objc_object**) + 204 4 libobjc.A.dylib 0x4cbc objc_autoreleasePoolPop + 260 5 WebKit 0x99f194 WebKit::WebUserContentControllerProxy::didPostMessage(WTF::ObjectIdentifierGeneric<WebKit::WebPageProxyIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebKit::FrameInfoData&&, WTF::ObjectIdentifierGeneric<WebKit::ScriptMessageHandlerIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, std::__1::span<unsigned char const, 18446744073709551615ul>, WTF::CompletionHandler<void (std::__1::span<unsigned char const, 18446744073709551615ul>, WTF::String const&)>&&) + 680 6 WebKit 0x1b358 WebKit::WebUserContentControllerProxy::didReceiveMessage(IPC::Connection&, IPC::Decoder&) + 392 7 WebKit 0xe86b0 IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::Decoder&) + 272 8 WebKit 0x23c0c WebKit::WebProcessProxy::didReceiveMessage(IPC::Connection&, IPC::Decoder&) + 44 9 WebKit 0xe3f054 IPC::Connection::dispatchMessage(WTF::UniqueRef<IPC::Decoder>) + 252 10 WebKit 0x332d4 IPC::Connection::dispatchIncomingMessages() + 744 11 JavaScriptCore 0x58a7c WTF::RunLoop::performWork() + 204 12 JavaScriptCore 0x599a4 WTF::RunLoop::performWork(void*) + 36 13 CoreFoundation 0x56328 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 14 CoreFoundation 0x562bc __CFRunLoopDoSource0 + 176 15 CoreFoundation 0x53dc0 __CFRunLoopDoSources0 + 244 16 CoreFoundation 0x52fbc __CFRunLoopRun + 840 17 CoreFoundation 0x52830 CFRunLoopRunSpecific + 588 18 GraphicsServices 0x11c4 GSEventRunModal + 164 19 UIKitCore 0x3d2eb0 -[UIApplication _run] + 816 20 UIKitCore 0x4815b4 UIApplicationMain + 340 21 APP1 0xa2f80 main + 21 (AppDelegate.swift:21) 22 ??? 0x1c234eec8 (シンボルが不足しています) Steps: WebView: WKWebView Message passing: WKScriptMessageHandler → passing data from Angular → Swift WKWebView is long-lived and reused Native is using WKUserContentController.add(_:name:) to register handlers Crashes are intermittent (hard to reproduce), but often follow: Screen sleep/wake Push notification open Angular calling native immediately after resume Questions: Has anyone seen this specific crash pattern involving CFRelease and WKScriptMessageHandler? Are there known WebKit or CoreFoundation bugs related to WKScriptMessageHandler and retained URLs or message content? Thank you for your help!

Our app connects to the headend to get a IDP login URL for each connection session, for example: “https://myvpn.ocwa.com/+CSCOE+/saml/sp/login?ctx=3627097090&amp;acsamlcap=v2” and then open embedded webview to load the page. (Note: the value of ctx is session token which changes every time). Quite often the webview shows blank white screen. After user cancel the connection and re-connect, the 2nd time webview loads the content successfully. The working case logs shows: didReceiveAuthenticationChallenge is called decidePolicyForNavigationAction is called twice didReceiveAuthenticationChallenge is called decidePolicyForNavigationResponse is called didReceiveAuthenticationChallenge is called But the failure case shows: Filed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x11461c240 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}} didReceiveAuthenticationChallenge is called decidePolicyForNavigationAction is called decidePolicyForNavigationResponse is called If we stop calling evaluateJavaScript code to get userAgent, the blank page happens less frequently. Below is the code we put in makeUIView(): func makeUIView(context: Context) -&gt; WKWebView { if let url = URL(string: self.myUrl) { let request = URLRequest(url: url) webview.evaluateJavaScript("navigator.userAgent") { result, error in if let error = error { NSLog("evaluateJavaScript Error: \(error)") } else { let agent = result as! String + " " + self.myUserAgent webview.customUserAgent = agent webview.load(request) } } } return self.webview } Found some posts saying call evaluateJavaScript only after WKWebView has finished loading its content. However, it will block us to send the userAgent info via HTTP request. And I don’t think it is the root cause since the problem still occurs with less frequency. There is no problem to load same web page on Windows desktop and Android devices. The problem only occurs on iOS and macOS which both use WKWebview APIs. Is there a bug in WKWebview? Thanks, Ying

When we embed some of the youtube videos are unable to load in the Mobile app but at the same time it works in Website. I need to allow it in both places. I have tried both embed and native sdk for youtube in iOS.

Hello. I have a project that loads a page using jquery 3.6.3 in WKWebView. When I try this on iOS developer beta 4, WKWebView malfunctions and the page does not load properly. If I remove jquery, the page loads. Even if I update jquery to the latest version, the problem remains the same. This problem did not occur until developer beta 3. The log is as follows. 0x12107c170 - [PID=994] WebProcessProxy::didClose: (web process 0 crash) 0x12107c170 - [PID=994] WebProcessProxy::processDidTerminateOrFailedToLaunch: reason=Crash Error acquiring assertion: &lt;Error Domain=RBSAssertionErrorDomain Code=2 "Specified target process 994 does not exist" UserInfo={NSLocalizedFailureReason=Specified target process 994 does not exist}&gt; 0x121138300 - ProcessAssertion::acquireSync Failed to acquire RBS assertion 'XPCConnectionTerminationWatchdog' for process with PID=994, error: (null) 0x132e00018 - [pageProxyID=9, webPageID=10, PID=994] WebPageProxy::processDidTerminate: (pid 994), reason=Crash 0x132e00018 - [pageProxyID=9, webPageID=10, PID=994] WebPageProxy::dispatchProcessDidTerminate: reason=Crash Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x13357de30 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}} Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x13357f390 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}} Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x13357d770 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}}

The new WebView implementation in *OS 26 versions is a very valuable addition to the SwiftUI toolset. I was experimenting with it and was wondering how to implement a Pull To Refresh. While this was easily achievable with the "old" WKWebView I was not able to find an API to implement, for example, a page reload when the user uses a pull to refresh gesture. I tried to attach to a .refreshable(_:) modifier to the WebView but without success. Is there an official API for that or should maybe .refreshable(_:) already work and it's just a bug or is it simply not yet supported? Here is a minimal example I was trying but didn't succeed: struct ContentView: View { @State private var page = WebPage() var body: some View { NavigationStack { WebView(page) .refreshable { page.reload() } } } } Any help is much appreciated. Thank you!

I would like to translate info in a three.js based web app as a 3D model in a volumetric window. Is it possible to do this in a similar manner as loading a web page in a WKWebView?

I have experienced problems with my app crashing on build (I believe it's while linking) with various combinations of Xcode version and iOS simulator version. It dates back to Xcode 16.3 in my testing, and continues through Xcode 16.4 and all Xcode 26 betas. This occurs whether the project running is UIKit-based or SwiftUI-based. Simply dropping a file with the following code into a project, without even needing to refer to its class anywhere else in the project, produces the crash. import Foundation import WebKit class WebBrowserController: NSObject, ObservableObject, WKNavigationDelegate { var webView: WKWebView override init() { self.webView = WKWebView() super.init() } func findString(_ string: String, completion: @escaping (WKFindResult) -> Void) { let configuration = WKFindConfiguration() webView.find(string, configuration: configuration) { result in completion(result) } } } With Xcode 26 beta 4 I am experiencing this issue with iOS 18.4 and iOS 18.5 simulators, but not with iOSW 18.3 or iOS 26 simulators. The complete history of my testing back to Xcode 16.3 and the problematic iOS versions is included Feedback #FB17737471. The crash message appearing in the Xcode 26 beta 4 console for iOS 18.5 is below: dyld[7438]: Library not loaded: /usr/lib/swift/libswiftWebKit.dylib Referenced from: <EF9CE2A7-9F7C-316D-869F-087AECC76C53> /Users/dennisbirch/Library/Developer/CoreSimulator/Devices/CD82152C-E407-4350-B8AE-C15B5304CA05/data/Containers/Bundle/Application/94F80728-CECE-4C24-84CF-C435069B276A/SwiftUIMissingWebViewLib.app/SwiftUIMissingWebViewLib.debug.dylib Reason: tried: '/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift/libswiftWebKit.dylib' (no such file), '/usr/lib/swift/libswiftWebKit.dylib' (no such file, not in dyld cache), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libswiftWebKit.dylib' (no such file) Library not loaded: /usr/lib/swift/libswiftWebKit.dylib Referenced from: <EF9CE2A7-9F7C-316D-869F-087AECC76C53> /Users/dennisbirch/Library/Developer/CoreSimulator/Devices/CD82152C-E407-4350-B8AE-C15B5304CA05/data/Containers/Bundle/Application/94F80728-CECE-4C24-84CF-C435069B276A/SwiftUIMissingWebViewLib.app/SwiftUIMissingWebViewLib.debug.dylib Reason: tried: '/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift/libswiftWebKit.dylib' (no such file), '/usr/lib/swift/libswiftWebKit.dylib' (no such f dyld config: DYLD_SHARED_CACHE_DIR=/Library/Developer/CoreSimulator/Caches/dyld/25A5316i/com.apple.CoreSimulator.SimRuntime.iOS-18-5.22F77/ DYLD_ROOT_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot DYLD_LIBRARY_PATH=/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libLogRedirect.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libViewDebuggerSupport.dylib DYLD_FRAMEWORK_PATH=/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator DYLD_FALLBACK_FRAMEWORK_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks DYLD_FALLBACK_LIBRARY_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib

Hi, How are we supposed to handle links with target="_blank" in the new SwiftUI WebView? I don't see anything in WebPage.NavigationDeciding or elsewhere that corresponds to the delegate method used for WKWebView.