Explore the integration of web technologies within your app. Discuss building web-based apps, leveraging Safari functionalities, and integrating with web services.

General Documentation

Posts under General subtopic

Post

Replies

Boosts

Views

Activity

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?
0
0
460
Mar ’25
PWA pre-caching issue in devices.
PWA works perfectly fine in safari browsers in mac but in mobile devices it is not working it just shows, There is no internet connection. found a fix from ios release - https://developer.apple.com/documentation/safari-release-notes/safari-17_2-release-notes but actually it is not solving the issue. in my case even it is not throwing the issue - fix is - Fixed a cache miss bug in DOMCache that triggered service worker fetch errors. (115740959) (FB13188943)
0
0
456
Jan ’25
The first four tab bars of Safari are hidden
There is no problem with the content display of each tab, but the tab bar is completely buggy. If you open 5 or more tabs and browse tabs after the 5, the first 4 tab bars will be completely blacked out, and you don't even know how many tabs you have. If you click on the place where the tab title probably exists, the tab is displayed as if the partial display of the tab bar has been restored. There is no problem with content display. But because it is unclear what tab is open, the browsing experience is at its lowest. If you switch to the tab after the 5th, the first 4 will return to the blackout state again. Of course, it is the latest software configuration at the moment. There is no shortage of memory at 24GB. I recently started developing a Safari extension with AppExtension, but is that due to it?
Topic: Safari & Web SubTopic: General
0
0
57
Apr ’25
role="link" elements
I'm having issues with opening up role="link". links in wkwebview. Is there a way in my decideforpolicy to allow these links to open up in the current webview vs another window like a traditional web browser does? Thank you ahead of time.
Topic: Safari & Web SubTopic: General Tags:
0
0
275
Jan ’25
Issue with SFSafariViewController Not Always Detecting Redirect After Stripe Payment
I am using SFSafariViewController to process payments via a Stripe checkout URL. Once the payment is completed, the user is redirected to a success URL. I have also added associated domains for deep linking. Below is my implementation: func presentCheckout(url: String) { showProgressHUD() let checkoutURL = URL(string: url)! safariVC = SFSafariViewController(url: checkoutURL) safariVC.delegate = self self.present(safariVC, animated: true) } // Delegate method implementations func safariViewControllerDidFinish(_ controller: SFSafariViewController) { print("SafariViewController dismissed") // Handle dismissal } func safariViewController(_ controller: SFSafariViewController, initialLoadDidRedirectTo URL: URL) { print(URL.absoluteString) if URL.absoluteString.contains("xsworld/payment/stripe/checkout/success") { controller.dismiss(animated: true) { if URL.absoluteString.contains("/v1/resources/xsworld/payment/stripe/checkout") { NotificationCenter.default.post( name: Notification.Name("StripePaymentStatus"), object: nil, userInfo: ["url": URL] ) } } } else if URL.absoluteString.contains("xsworld/payment/stripe/checkout/cancel") { // Handle failure NotificationCenter.default.post( name: Notification.Name("StripePaymentStatus"), object: nil, userInfo: ["url": URL] ) } } func safariViewController(_ controller: SFSafariViewController, didCompleteInitialLoad didLoadSuccessfully: Bool) { if didLoadSuccessfully { print("Initial page loaded successfully") } else { print("Initial page load failed") } } Issue: The safariViewController(_:initialLoadDidRedirectTo:) method does not always get called after the payment is completed. Sometimes it works as expected, and sometimes it does not trigger at all. What I’ve Tried: Ensuring the associated domains for deep linking are correctly set up. Checking the success and failure URLs. Debugging to see if the redirect happens but is not detected. What I Need Help With: I want to ensure that the redirection always works after the payment process is completed, whether through deep linking or another reliable approach. How can I guarantee that my app correctly detects and handles the redirect every time? Any guidance or best practices would be greatly appreciated.
0
0
461
Feb ’25
In Safari's JavaScript geolocation, is altitude based on MSL or WGS84 ellipsoid?
Hello all, I'm trying to retrieve geolocation data on the web, but I'm having trouble with the altitude value, which seems to differ from what I get on Android. When using navigator.geolocation.getCurrentPosition in Safari, is the altitude value based on mean sea level, or is it ellipsoidal altitude based on the WGS84 ellipsoid? altitude (WebKit JS): https://developer.apple.com/documentation/webkitjs/coordinates/1631861-altitude altitude (Core Location): https://developer.apple.com/documentation/corelocation/cllocation/altitude ellipsoidalAltitude (Core Location): https://developer.apple.com/documentation/corelocation/cllocation/ellipsoidalaltitude If anyone has any insight into this topic I would greatly appreciate it!
0
0
65
Jun ’25
Safari Takes 30 Seconds to Load mTLS-Enabled Sites Unless in Private Browsing
I’m experiencing an issue where Safari takes approximately 30 seconds to load web pages on mTLS-enabled sites. However, when I enable Private Browsing mode, the problem disappears. This suggests that the issue is not related to the network environment. To provide more context, I’ve attached a Wireshark packet capture for reference. From the logs, it seems that the TLS handshake process encounters delays, but I cannot identify the exact cause. Has anyone encountered a similar issue or can provide insights into what might be causing this behavior? Any troubleshooting suggestions or fixes would be greatly appreciated. OS: iPadOS 18.2.1 Thank you! Wireshark packet capture
Topic: Safari & Web SubTopic: General
0
0
205
Jan ’25
Can I use allowFileAccessFromFileURLs to access local html file in my Project and not get appStorereview
We are currently implementing the payment flow, and for handling payment details — including card entry and validation — we are utilizing a WKWebView. The webview securely loads the payment provider’s page, ensuring sensitive information such as card numbers are entered and validated directly within the web context. I’d like to clarify that this change has not yet been released to Production. As part of a feature enhancement to our existing payment flow, we are transitioning to a new payment vendor, SnapPay. While trying to load the SnapPay URL embedded within an iFrame in our iOS app, I observed the following error in the Xcode console. While this error may be generic, I wanted to highlight it: 825a18 - [pageProxyID=7, webPageID=8, PID=67346] WebPageProxy::didFailLoadForFrame: frameID=24, isMainFrame=0, domain=NSURLErrorDomain, code=-999 Upon investigating, we compared the headers from our existing payment URL and SnapPay's URL, and found that SnapPay includes the following Content-Security-Policy (CSP) header: Content-Security-Policy: frame-ancestors ... "Content-Security-Policy" value="default-src 'self'; script-src 'self' https://hcaptcha.com https://.hcaptcha.com https://code.jquery.com https://www.gstatic.com https://code.jquery.com/jquery-3.3.1.min.js https://test.lightbox.cardx.com/v1/lightbox.min.js https://www.ssa.gov/accessibility/andi/ https://c.evidon.com 'unsafe-inline' 'unsafe-eval'; style-src 'self' https://hcaptcha.com https://.hcaptcha.com https://fonts.googleapis.com/css https://stage.snappayglobal.com/Resource/ https://www.ssa.gov/accessibility/andi/andi.css 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' *.googleapis.com *.gstatic.com ; connect-src 'self' https://demo1.cditechnology.com https:; form-action https://hcaptcha.com https: 'self' *.ipg-online.com secure.bluepay.com https://test.api.lightbox.cardx.com https://3ds-acs.test.modirum.com/ https://demo1.cditechnology.com/; frame-ancestors https://snappaydirect-perf.fiserv.com 'self' file: https: http; frame-src .snappayglobal.com 'self' https://hcaptcha.com https://.hcaptcha.com https: https://www.google.com .ipg-online.com secure.bluepay.com https://.cardconnect.com https://test.api.lightbox.cardx.com/ https://test.lightbox.cardx.com https://paywithcardx.com/payment/auth.cgi securepayments.cardpointe.com *.cardpointe.com https://3ds-acs.test.modirum.com/ https://www.yokohamatire.com http://uat1-txt.ad.portal.texas.gov https://uat1-txt.ad.portal.texas.gov " After multiple working sessions with the SnapPay team, we were able to confirm that when they disable CSP or remove the frame-ancestors directive, the iFrame loads successfully within our app. However, SnapPay cannot change on their CSP. To enable the iFrame to load in the iOS app, we added the following line of code: webView.configuration.preferences.setValue(true, forKey: "allowFileAccessFromFileURLs"). This resolved the issue with loading the iFrame. Note: the file being loaded is a local .html file,. Before submitting this update to the App Store, I’d like to confirm whether this usage of allowFileAccessFromFileURLs is acceptable for App Store review. I wanted to confirm that with this change is there a security concern for WKWebview?
0
0
121
Apr ’25
Where to find possible ApplePayFeatures
Using the PaymentRequestAPI, I see this request element listed, but I can't find any description what these features could be: sequence <ApplePayFeature> features; https://developer.apple.com/documentation/apple_pay_on_the_web/applepayrequestbase https://developer.apple.com/documentation/apple_pay_on_the_web/applepayrequestbase/4224914-features
0
0
356
Jan ’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%
0
0
100
Apr ’25
WKWebView Entitlements
Hi all, I'm developing an application that uses WKWebView to display a web application which I augment with iOS native utilities such as Speech to Text and IAP. The application also uses Service workers, so we define AppBound Domains in the info.plist file. Everything works for this, but when we deploy on a device the application will crash and say we need these entitlements com.apple.developer.web-browser-engine.networking, com.apple.developer.web-browser-engine.rendering, com.apple.developer.web-browser-engine.webcontent, com.apple.runningboard.assertions.webkit From what I can see, we do need all of them. However Apple suggest submitting a request to be an Altnerative Browser (https://developer.apple.com/support/alternative-browser-engines) This is not appropriate for the application in my view since one requirement of being an alternative browser is that you don't modify the resources on the web site - we of course do since we inject javascript in order to bridge between iOS and the contents of the webview. How are people navigating this issue? I assumed it would be common given the use of Tauri etc. to build similar types of applications, but I don't see much about it. Thank you!
0
0
120
May ’25
Camara preview High probability failed on iOS17.5
When using WKWebview to load the following url on iOS17.5, The Camara preview page is likely to not display the image, but there is no error report. The video cannot be loaded. There is no problem with iOS17 and iOS18. I can't find the cause of the error, How to avoid this problem? I hope you can provide some suggestions. I want a way to avoid the error,Thanks STEPS TO REPRODUCE Run iOSTest.xcodeproj on iOS17.5 Tap WKWebview(Camara) Waiting webview load url tap 手持设备训练 立即开始 download demo https://github.com/xuty/Report22/raw/refs/heads/main/iOSTest_1_url.zip
Topic: Safari & Web SubTopic: General
0
0
275
Jan ’25
iOS 18.3 beta meet CannotConnectToHost - 1004
Recently, our some customers feedback that their phones can not connect to our site by safari or App, show the error of “Cannot Connect to Host -1004”,all of these problem customers has installed iOS 18.3 beta. Is there anybody meet the same problem?
Topic: Safari & Web SubTopic: General
0
0
290
Jan ’25
HELP!Apple Pay Web application cannot pay due to the bottom rotation issue
I built a web application using the Apple Pay on the Web Interactive Demo with the Payment Request API, but encountered a few issues: The initiated web Apple Pay interface shows a spinning circle at the bottom and cannot proceed with payment(Bottom display:正在处理). What could be causing this? How to set up sandbox testing for payments? How to asynchronously and synchronously retrieve payment results (backend code to fetch payment results)? The demo only shows frontend code using await response.complete("success"); for retrieving payment results my demo URL: https://shop.wowseer.com/rsolomakhin/pr/applepay/
0
0
86
Apr ’25
Apple Pay Merchant validation Url - ambiguous API documentation
Hello, I was going through the Apple Pay API documentation and noticed ambiguity on the exact process to complete merchant validation. One of the documentation mentions that the validation url will be Your server posts a request using mutual TLS (mTLS) by calling the Apple Pay server’s Payment Session endpoint. Endpoint (Global) POST https://apple-pay-gateway.apple.com/paymentservices/paymentSession Endpoint (China region) POST https://cn-apple-pay-gateway.apple.com/paymentservices/paymentSession Referencing the url: https://developer.apple.com/documentation/apple_pay_on_the_web/apple_pay_js_api/requesting_an_apple_pay_payment_session whereas the other references that the value should be used as provided by the onvalidatemerchant event object with the property validationURL. Refer: https://developer.apple.com/documentation/apple_pay_on_the_web/apple_pay_js_api/providing_merchant_validation Can someone confirm which is the correct approach to follow ?
0
0
378
Feb ’25
AdTag URL - on learn more action - Redirects to External Safari Browser - Need to lock orientation to Portrait Mode
We’re currently working on an OTT-based application where we integrate Google Ad Manager to serve video ads. As part of the ad experience, users often see a “Learn More” CTA (Call to Action) on these ads. As per our current requirement, when a user taps “Learn More” on an ad: • The link should open in Safari (i.e., an external browser) on iOS devices • The Safari browser should ideally open in portrait orientation, as the ad content and layout are optimised for portrait mode However, based on our understanding and technical constraints on iOS, it appears that: • Orientation control is restricted to the app’s own context. • Once Safari is launched via UIApplication.shared.open, we no longer have control over how it behaves in terms of orientation. • iOS system behaviour determines Safari’s orientation based on the device’s physical orientation and Safari’s own internal configuration. Could you please confirm if there’s any supported way (via SDK, deep link config, or otherwise) to enforce portrait orientation in Safari when opening such external URLs from within an iOS app? If this is not technically feasible, we would appreciate any best practices or alternatives you can suggest for ensuring a consistent user experience.
Topic: Safari & Web SubTopic: General
0
2
106
Jun ’25
Embedded Power BI reports crashes in mobile layout using iOS
We're embedding the Power BI reports into our portal by using JS library. While testing them, we found that mobile layout of the reports don't work as we expect on iOS devices (tested in Chrome and Safari). There are two principals issues: 1) the site is automatically refreshed when the users filter the data (we reduced them to lower expression) and 2) the site also crashes after a while using the dashboard by applying different filters.
0
0
56
Mar ’25