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Memory leak in WebKit caused by KVO and @StateObject
Hi! My SwiftUI app is a rather complex browser app. Starting with iOS 18, the app crashes due to repeted reloads of the WkWebView. I’ve tracked the issue as far as I can, but I still haven’t found the root cause. My app is structured like this: MainView holds a cuple of subviews. It also holds a @StateObject called viewModel that holds a lot of @Published vars. The viewModel is passed as a enivormentObject. Example from ViewModel: @MainActor class ViewModel: NSObject, ObservableObject { @Published public var isLoading: Bool = false @Published public var loadProgress: Double? = 0 public func setIsLoading(_ value: Bool) async { self.isLoading = value } public func setLoadProgress(_ value: Double?) async { self.loadProgress = value } } WebView is a subview of MainView, which holds a navigation bar, and a UIViewRepresentable, which is a WkWebView. The WkWebView pushes some states to the ViewModel as the underlying values of the WkWebView changes, i.e. estimaedProgress, and isLoading. This is done via KVO and works like this: estimatedProgressObservation = self.parent.webView.observe(\.estimatedProgress) { webView, progress in Task { await parent.viewModel.setLoadProgress(webView.estimatedProgress) } } isLoadingObservation = self.parent.webView.observe(\.isLoading) { webView, value in Task { await parent.viewModel.setIsLoading(webView.isLoading) } } By using a timer in WkWebViews Coordinator, i trigger a load after a configurable amount of time :
 func loadUrl(url: URL) { DispatchQueue.main.async { console.info("Load URL: ...", sensitive: "Load URL: \(url.absoluteString)") let policy: NSURLRequest.CachePolicy if self.parent.settings.noCache { policy = .reloadIgnoringLocalAndRemoteCacheData } else { policy = .useProtocolCachePolicy } let request = URLRequest(url: url, cachePolicy: policy) self.parent.webView.load(request) } } Running the app with the automatic reload enabled freezes the app after a couple of hours. It also seems to freeze Safari on the device. The device needs to be rebooted. If I inspect the device's running processes, hundreds of ”com.apple.webkit. web content " processes are running. Removing await parent.viewModel.setLoadProgress(webView.estimatedProgress) and await parent.viewModel.setIsLoading(webView.isLoading) fixes the issue, but it is necessary for other app functions. Therefore, is suspect that the viewModel somehow causes the bug. The issue arises after a couple of loads 5-10. The debugger shows a message when the processes start to pile up. I suspect its related. Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x12d0e7f60 {Error Domain=RBSServiceErrorDomain Code=1 "Client not entitled" UserInfo={RBSEntitlement=com.apple.runningboard.terminateprocess, NSLocalizedFailureReason=Client not entitled, RBSPermanent=true}}} How can I find out what causes the suspected memory leak? Instruments gives me nothing of value. The memory leak wasn't present in iOS 17. Is this a bug in iOS 18, or was something intentionally changed?
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478
Mar ’25
How to Use Apple Web Payment Merchant Certificate?
Doc URL: https://developer.apple.com/documentation/applepayontheweb/requesting-an-apple-pay-payment-session How can I send a POST request using PHP, and what certificates are required? Currently, I have downloaded the following files on the backend: merchant_id.cer, apple_pay.cer, and a local cert.p12 file This my code: But,run error:cURL Error: unable to set private key file: '***/private.pem' type PEM%
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103
Apr ’25
iOS 18.3.x no longer accepts self singed certificates
We have an app store app that hosts an internal webserver we use as a proxy and it works for a period until iOS 18.3.x decides our cert is no longer valid at which point our customer have reinstall the app. This has only become a problem on iOS18.3. We publish the self-signed with out app, and it is valid and accepted until it's not. We know the cert is valid and our implementation of the local proxy has not changed. If we install a cert on the device and trust it, then the app will start behaving normally again without reinstall. We have replicated this locally and the error we are seeing is: Error Domain=NSURLErrorDomain Code=-1200 "An SSL error has occurred and a secure connection to the server cannot be made." UserInfo={NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, _WKRecoveryAttempterErrorKey=<WKReloadFrameErrorRecoveryAttempter: 0x301111e40>, networkTaskDescription=LocalDataTask <541390E2-65FA-47AB-80B1-10209D6C761A>.<3>, _kCFStreamErrorDomainKey=3, NSErrorPeerCertificateChainKey=( "<cert(0x108e3b700) s: 127.0.0.1 i: 127.0.0.1>", "<cert(0x108e3b980) s: 127.0.0.1 i: 127.0.0.1>" ), NSErrorClientCertificateStateKey=0, NSErrorFailingURLKey=https://localhost:8082/Blablal/?device=ios&sftouch=1&pgport=8081&secure=1, NSErrorFailingURLStringKey=https://localhost:8082/blahblah/?device=ios&sftouch=1&pgport=8081&secure=1, NSUnderlyingError=0x301e1d680 {Error Domain=kCFErrorDomainCFNetwork Code=-1200 "(null)" UserInfo={_kCFStreamPropertySSLClientCertificateState=0, _kCFNetworkCFStreamSSLErrorOriginalValue=-9802, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9802}}, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <541390E2-65FA-47AB-80B1-10209D6C761A>.<3>" ), _kCFStreamErrorCodeKey=-9802, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <541390E2-65FA-47AB-80B1-10209D6C761A>.<3>, networkTaskMetricsPrivacyStance=NotEligible, NSURLErrorFailingURLPeerTrustErrorKey=<SecTrustRef: 0x302670a50>, NSLocalizedDescription=An SSL error has occurred and a secure connection to the server cannot be made.}
Topic: Safari & Web SubTopic: General Tags:
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622
Feb ’25
The top of the body pages on my website is cut off on ios
Hello, When I view my website (lasaluade) on iphone or ipad the top of my page bodies are cut off (3-4 first lines). However, on PC, Mac or Android everything is OK (see screenshots). For the record, I built this site with Wordpress and Divi Builder, and I've the same result on Safari and Chrome. Not being a developer, I don't know where to look (I just think it's iOS-related). Have you already had this problem? Do you have any ideas? Thanks for your help!
Topic: Safari & Web SubTopic: General
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31
Apr ’25
Disable Smart Punctuation from Webpage
I would like to know if there is a way to disable Smart Punctuation from the webpage rather than requiring the user to do so from the settings. Adding a "inputmode=verbatim" attribute to the input HTML tags for my webpage did that for all the web browsers I tested on Windows, Ubuntu, Android, and MacOS. I tested Chrome and Firefox on all platforms, as well as Edge on Windows and Safari on Mac and iOS. So far the only time it did not disable Smart Punctuation was on Safari on iOS, but it did on MacOS.
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111
Mar ’25
SFSafariApplication doesn't transmitt messages to docked website.
Hi! I'm working on a web extension for Safari and I need to send messages from the containing application to JavaScript. For this I use the method class func dispatchMessage( withName messageName: String, toExtensionWithIdentifier identifier: String, userInfo: [String : Any]? = nil ) async throws of the SFSafariApplication class. If the site is opened in Safari in normal mode, everything works as expected. However, if the site is "docked", the messages are not transmitted to this "Web App".
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85
May ’25
Simulator 18.4 Webview CORS issues
I have a very specific issue that happens only on iOS Simulator version 18.4. It does NOT happen when I run my app on a real iOS 18.4 device through Testflight. My app displays a WebView (courtesy of Capacitor, url scheme capacitor://). Inside that Webview I'm using Firebase JS API (11.2.0) and calling signInWithEmailAndPassword, which works well in all other contexts, i.e. browser, Android webview, iOS webview in all other Simulator versions, and on real devices. Only when running in Simulator 18.4, I get a failed network request: cannot parse response Fetch API cannot load https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?... due to access control checks. Failed to load resource: cannot parse reponse error: FirebaseError: (auth/network-request-failed) Everything is working correctly for both: Capacitor app webview installed on a real 18.4 device with Testflight Safari (non-webview) in the 18.4 Simulator The issue is severe for us, because we are unable to develop our app and test it in the simulator on 18.4 Simulator before pushing it through Testflight internal release. Request headers on the failed request (no response status or headers available). Request Accept: / Content-Type: application/json Origin: capacitor://localhost Sec-Fetch-Dest: empty Sec-Fetch-Mode: cors Sec-Fetch-Site: cross-site User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_4 like Mac OS X) - AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 X-Client-Version: Mobile/JsCore/11.2.0/FirebaseCore-web X-Firebase-Client: (...)
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282
Apr ’25
Issue with Declarative Net Request Rule (DNR) Persistence Across Redirects in Safari
When a DNR rule is set for a specific URL and the request receives a server-side redirect (e.g., 302) to a different URL that does not match the urlFilter, the rule still seems to apply to the redirected request. We are using macOS 15.4 and Safari 18.4. For example, consider two sequential calls: call1 and call2. call1 triggers a 302 redirect to call2. A DNR rule is created to add a "Cookie" header to call1 based on its URL. Unexpectedly, the same cookie is also added to call2, even though call2's URL does not match the rule's urlFilter. This results in the Set-Cookie response from call1 being ignored, and call2 receiving the manually set cookie instead—leading to incorrect behavior. This issue doesn't occur in Chrome or Firefox, where the rule is not applied to the redirected request if the URL no longer matches. We are looking for assistance in fixing these issues and having our Safari Extension function the same as it does in Firefox and Chrome.
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116
Apr ’25
Subscription permission denied on webapp push
HI, please can someone help? I have a web app where push notifications are in place for Chrome, Firefox, and Edge. Providing the user allows notifications then when they log in for the first time their details are registered to the subscriptions table in the backend. All good so far. When trying to do the same with Safari on Mac I'm faced with this issue: "Safari doesn’t support invisible push notifications. Present push notifications to the user immediately after your service worker receives them. If you don’t, Safari revokes the push notification permission for your site." and the user is not registered in the subscription table with the Safari console just saying variations of this: [Warning] Notification permission denied. (notifications_frontend.js, line 177, x2) [Log] Enable Notifications button clicked (notifications_frontend.js, line 245) [Log] Safari Push Notifications detected (notifications_frontend.js, line 248) [Warning] Safari Push Permission denied. (notifications_frontend.js, line 278) I've found this on an another forrum: "Safari requires that you immediately post a notification when a push message is received. "Immediately" means that it cannot be after some async operation. If you display a notification immediately from the service worker itself, it will stop displaying that error. I cannot remember 100% but I think if you clear your cache and cookies you will be able to receive push messages again if you accidentally get blocked while testing." and I've tried adding buttons to trigger allowing notifications but it all seem to late to get the subscription registered in the subscription table. I'm pretty new to coding so if any has a similar experience and can advice how to get the subscriptions registered when the user logs on for the first time in Safari in a Mac it would be greatly appreciated. Thanks...
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353
Jan ’25
Safari Web Extension service_worker failed to load
I built and extension for chrome, edge, and firefox. I'm porting the chrome extension to safari using the safari-web-extension-converter tool. This has worked successfully and I was able to publish my extension to the app store. I made some updates to the service worker code recently and I'm now being hit with an error when trying to load my unsigned extension into safari: The service_worker script failed to load due to an error. I've looked online at some other forums and haven't found anything helpful around how to debug this kind of error. Because the service worker is non-persistent in safari, I don't have access to the console logs of the service worker through the Develop > Web Extension Background Context menu. Has anyone successfully debugged this kind of error? Are there logs I can pull directly from safari that would help me here? Thanks in advance for the help!
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299
Feb ’25
Tracking playback events from Apple Podcasts iframe in AEM
Hi everyone, I’m working on a web project developed on Adobe Experience Manager (AEM), where we’ve built a custom component that embeds Apple Podcasts episodes using the official iframe provided via https://embed.podcasts.apple.com. Everything works correctly from a rendering point of view, but we are now exploring ways to track user interactions with the embedded player, specifically events such as: start, play, pause, progress milestones (e.g. 25%, 50%, etc.). This data would be used to send analytics events to Adobe Analytics. So far, we haven’t found any documentation or JavaScript API that would allow us to listen to these events. We'd like to ask: Is there any official way to track playback events from an Apple Podcasts iframe? Any information, clarification, or direction would be really appreciated. Thanks in advance! Thanks, Adriana
Topic: Safari & Web SubTopic: General
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51
Apr ’25
Prevent collapsing every tab group when collapsing sidebar
I'm not sure if this is even the right place to ask this, or voice this complaint if there's no fix. If not, please direct me where to go. I'm trying to switch all my development over to Safari, but the tab sidebar is driving me absolutely insane. Let's say I have a bunch of tab groups expanded, and I collapse the sidebar to focus on the webapp I am building. When I toggle to show the sidebar again, every single tab group is collapsed. Why is it 2 clicks to see the tabs in the sidebar? Even with zero tab groups, and just tabs in the workspace, if you collapse the sidebar it'll collapse the list of tabs. Is there some hidden setting for this? Who do we have to complain to?
Topic: Safari & Web SubTopic: General
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201
Feb ’25
Safari extension service worker appears with a delay in the Develop dropdown
Hi, I'm developing an extension and I need to debug console logs that are logged in the Service Worker. The worker is configured in the manifest and is generally working as expected: However, when I open the browser, go to any site, and open Develop -> Service Workers or Develop -> Web Extension Background Content it is not visible there, so I can't really access the logs: But then I noticed that if I go out of focus from the browser for some time (and probably let the SW die), it becomes visible and I can open it without an issue: So, a couple of questions: Why isn't it instantly accessible? The extension Service Worker dev tools should be accessible regardless of what is happening to the tab or the browser, even if the SW terminates. Why does it eventually appear under Web Extension Background Content instead of the Service Workers when it is in fact an SW?
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430
Feb ’25
Can't publish my app due to Mini apps
Hello Community, My application was rejected by Apple App Review, citing Guideline 4.7 and "non-embedded," which I believe is incorrect. All transactions are signed and sent directly through the app with explicit user permission. Additionally, there's an issue with min apps where users can access the functionality via a browser to interact with the service. This feature has been part of my old application and hasn't changed in the new update. It’s the same functionality as used by popular wallets like Metamask Uniswap Coinbase Which also employ web3 technology. Over the past two weeks, I've tried to communicate with Apple's support team but have been ignored or received only generic rejection emails. This has left me frustrated and concerned about the time and resources I’ve invested in developing and supporting this app. Could you please help me find a solution? Your assistance would be greatly appreciated!
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73
Apr ’25
Forcing Reflow in Safari/Chrome on iOS When Switching from overflow-x: hidden to overflow-x: scrollcroll tant que l'utilisateur maintient son doigt sur l'écran
Hello everyone, We are encountering a specific issue on iOS devices (iPhone 15 Pro in our case) when using Safari and Chrome. The problem occurs when switching an element's overflow-x property from hidden to scroll while the user keeps their finger on the screen. Problem Description: The overflow-x property change does not trigger a reflow or render update immediately. This behavior causes the element to remain visually stuck in the previous hidden state until the user lifts their finger and interacts again. Context: The element is animated. The issue happens consistently when the user's finger remains on the screen during the property transition. What We’ve Tried: Explicitly forcing styles using element.style in JavaScript. Triggering element.offsetWidth or getBoundingClientRect() to force reflow. Applying manual transform changes in combination with overflow updates. Unfortunately, none of these approaches resolve the issue in real-time while the user’s finger is on the screen. Questions: Is there a recommended way to force a reflow or repaint in Safari/Chrome on iOS under these conditions? Are there known limitations with overflow-x transitions and user touch events on iOS? Are there any workarounds or best practices to handle such cases? Thank you in advance for any insights!
Topic: Safari & Web SubTopic: General
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428
Jan ’25