Since I installed the **iOS 13.2 beta**, I have been getting a debug console error message. It happens every time I load a ViewController with a WKWebView object in the storyboard.


Then the following message is shown continuously while the web view is visible
...

    2019-10-10 12:10:47.867830+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:47.908698+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:47.908814+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:47.934169+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:47.947668+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:47.964375+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.193556+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.193723+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.193941+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.194012+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.195679+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.200432+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.207225+0200 (...) [Process] kill() returned unexpected error 1  
    2019-10-10 12:10:48.207298+0200 (...) [Process] kill() returned unexpected error 1 

At the moment I close the view I get the following message: 

    2019-10-10 12:32:41.577505+0200 (...)[ProcessSuspension] 0x1051e50b0 - ProcessAssertion::processAssertionWasInvalidated() 

Sometimes I get the following message in the middle while the web view is loaded: (I can&#39;t say when it happens)
 
    2019-10-10 12:33:11.453528+0200 (...) Could not signal service com.apple.WebKit.WebContent: 113: Could not find specified service
    2019-10-10 12:33:11.459713+0200 (...) Could not signal service com.apple.WebKit.Networking: 113: Could not find specified service

And the if I touch the screen it starts again

        2019-10-10 12:10:48.200432+0200 (...) [Process] kill() returned unexpected error 1  
        2019-10-10 12:10:48.207225+0200 (...) [Process] kill() returned unexpected error 1  
        2019-10-10 12:10:48.207298+0200 (...) [Process] kill() returned unexpected error 1 
    ...




I have checked that this is happening in all of the view controllers with WKWebViews of my app, so it doesn&#39;t seem to be a code error. 

This **doesn&#39;t crash the app**, but I would like to know why this is happening, and if someone else is having the same issue. 



Why I get the console warning: [Process] kill() returned unexpected error 1 when I load a WKWebView in iOS13.2?

Does anyone know how to fix this error with Xcode 9 GM? I&#39;m working on an app made with Xcode 8.3, the deployment target is for iOS 9.3 and I never had this problem before. I don&#39;t find any information here or on Apple forums yet :( 

Edit: This error came when I put a WKWebView into interface builder, not if I use it programmatically.

![See picture WKWebView Error][1]

**Edit 2: Well, it&#39;s finally not a bug, see Quinn&#39;s answer below to have more information about this behavior. Thanks to him for the explanation.** 


  [1]: https://i.stack.imgur.com/3cQh8.png

Xcode 9 GM - WKWebView NSCoding support was broken in previous versions

I&#39;m trying to switch an existing app from `UIWebView` to `WKWebView`. The current app manages the users login / session outside of the `webview` and sets the `cookies` required for authentication into the the `NSHTTPCookieStore`. Unfortunately new `WKWebView` doesn&#39;t use the `cookies` from the `NSHTTPCookieStorage`. Is there another way to achieve this?

Can I set the cookies to be used by a WKWebView?

`WKWebView` does not open any links which have `target=&quot;_blank&quot;` a.k.a. &#39;Open in new Window&#39; attribute in their HTML `&lt;a href&gt;`-Tag.

Why is WKWebView not opening links with target=&quot;_blank&quot;?

For previous iOS 8 betas, load a local web app (in Bundle) and it works fine for both `UIWebView` and `WKWebView`, and I even ported a web game using the new `WKWebView` API.

    var url = NSURL(fileURLWithPath:NSBundle.mainBundle().pathForResource(&quot;car&quot;, ofType:&quot;html&quot;))

    webView = WKWebView(frame:view.frame)
    webView!.loadRequest(NSURLRequest(URL:url))

    view.addSubview(webView)
 
But in beta 4, I just got a blank white screen (`UIWebView` still work), looks like nothing is loaded or executed. I saw an error in the log:
 
Could not create a sandbox extension for `/`
 
Any help to guide me to the right direction? Thanks!

WKWebView not loading local files under iOS 8

in my app I&#39;m migrating from UIWebView to WKWebView , how can I rewrite these function for WKWebView?



        func webViewDidStartLoad(webView: UIWebView){}
        func webViewDidFinishLoad(webView: UIWebView){}
 and





        func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -&gt; Bool {
            print(&quot;webview asking for permission to start loading&quot;)
            if navigationType == .LinkActivated &amp;&amp; !(request.URL?.absoluteString.hasPrefix(&quot;http://www.myWebSite.com/exemlpe&quot;))!{
                UIApplication.sharedApplication().openURL(request.URL!)
                print(request.URL?.absoluteString)
                return false
            }
            print(request.URL?.absoluteString)
            lastUrl = (request.URL?.absoluteString)!
    
            return true
        }


        func webView(webView: UIWebView, didFailLoadWithError error: NSError?) {
            print(&quot;webview did fail load with error: \(error)&quot;)
            let testHTML = NSBundle.mainBundle().pathForResource(&quot;back-error-bottom&quot;, ofType: &quot;jpg&quot;)
            let baseUrl = NSURL(fileURLWithPath: testHTML!)
            
            let htmlString:String! = &quot;myErrorinHTML&quot;
            self.webView.loadHTMLString(htmlString, baseURL: baseUrl)
        }



Migrating from UIWebView to WKWebView

I am updating my iOS app to replace `UIWebView` with `WKWebView`. However I don&#39;t understand how to achieve the same behavior with `WKWebView`. With `UIWebView` I used `scalesPageToFit` to ensure the web pag was displayed with the same size as the screen size (so as to appear full screen without scrolling).

I found that solution on the web however it does not work :

    - (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
        NSString *javascript = @&quot;var meta = document.createElement(&#39;meta&#39;);meta.setAttribute(&#39;name&#39;, &#39;viewport&#39;);meta.setAttribute(&#39;content&#39;, &#39;width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no&#39;);document.getElementsByTagName(&#39;head&#39;)[0].appendChild(meta);&quot;;
        [webView evaluateJavaScript:javascript completionHandler:nil];
    }

WKWebView equivalent for UIWebView&#39;s scalesPageToFit

I have implemented a WKWebView in an app.
there&#39;s a file input in the shown web page where it should import an image from photos.
Whenever i press on that input and select either &quot;Take Photo&quot; or &quot;Photo Library&quot; the app suddenly crash, which I believe is because the app is missing the permission to either take a photo or import from library.

How do I push a permission request when the user select one of the mentioned methods (Take Photo or Photo Library)?

I use Swift 3.0 with WKWebView.
   

Request Permission for Camera and Library in iOS 10 - Info.plist

I am using **WKWebView** for viewing custom HTML. 

 - Regardless of HTML content, when testing on real device, I receive the following error `Could not signal service com.apple.WebKit.WebContent: 113: Could not find specified service` in 29 sec after **WKWebView** content loaded, sometimes I even receive this error twice. Clearly, it is a configuration issue. I have checked cookies as proposed in https://stackoverflow.com/questions/40811887/could-not-signal-service-com-apple-webkit-webcontent, however it doesn&#39;t help
 - Another question is whether there exist a list of all error codes that might pop up in **WKWebView**

com.apple.WebKit.WebContent drops 113 error: Could not find specified service

It seems that the IB object templates in XCode 6 beta are still creating old-style objects (UIWebView for iOS and WebView for OSX).  Hopefully Apple will update them for the modern WebKit, but until then, what is the best way to create WKWebViews in Interface Builder?  Should I create a basic view (UIView or NSView) and assign its type to WKWebView?  Most of the examples I find online add it to a container view programmatically; is that better for some reason?

WKWebView in Interface Builder

Yesterday, I uploaded my App to TestFlight and after a while Apple sent me this warning:

&gt; ITMS-90809: Deprecated API Usage - Apple will stop accepting submissions of apps that use UIWebView APIs . See https://developer.apple.com/documentation/uikit/uiwebview for more information.

The thing is that I don&#39;t use UIWebView in my app so I tried to update my pods but still the same thing.By the way this is my 3rd build on TestFlight and this is the first time apple sends me this. Any ideas?

**Update**

These are my pods:

    pod &#39;Firebase/Core&#39;
	pod &#39;Firebase/Firestore&#39;
	pod &#39;Firebase/MLVision&#39;
	pod &#39;Firebase/MLVisionTextModel&#39;
	pod &#39;SVProgressHUD&#39;
	pod &#39;SPPermission/Camera&#39;
	pod &#39;SPPermission/PhotoLibrary&#39;
	pod &#39;Mantis&#39;
	pod &#39;SwiftKeychainWrapper&#39;
	pod &#39;SwiftyOnboard&#39;
	pod &#39;Fabric&#39;
	pod &#39;Crashlytics&#39;

**Update 2** 

Seems like I found the frameworks with the issue.

    Binary file ./Pods/FirebaseMLCommon/Frameworks/FirebaseMLCommon.framework/FirebaseMLCommon matches
    Binary file ./Pods/Crashlytics/iOS/Crashlytics.framework/Crashlytics matches
    Binary file ./Pods/GoogleMobileVision/Detector/Frameworks/GoogleMobileVision.framework/GoogleMobileVision matches

So now do I have to wait for google to fix them and update my pods?





ITMS-90809: Deprecated API Usage -- Apple will stop accepting submissions of apps that use UIWebView APIs

My view controller displays a WKWebView. I installed a message handler, a cool Web Kit feature that allows my code to be notified from inside the web page:

    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        let url = // ...
        self.wv.loadRequest(NSURLRequest(URL:url))
        self.wv.configuration.userContentController.addScriptMessageHandler(
            self, name: &quot;dummy&quot;)
    }

    func userContentController(userContentController: WKUserContentController,
        didReceiveScriptMessage message: WKScriptMessage) {
            // ...
    }


So far so good, but now I&#39;ve discovered that my view controller is leaking - when it is supposed to be deallocated, it isn&#39;t:

    deinit {
        println(&quot;dealloc&quot;) // never called
    }

It appears that merely installing myself as a message handler causes a retain cycle and hence a leak!

WKWebView causes my view controller to leak

I need to implement the WKWebview for my ios app with Xcode. However i have error when using it &quot;undeclared type &#39;WKWebview&#39;&quot;. Do i missing anything important.

I&#39;m using the latest Xcode7 download from App Store.

WKWebView not in Xcode

I am experimenting with replacing a dynamically allocated instance of UIWebView with a WKWebView instance when running under iOS 8 and newer, and I cannot find a way to determine the content size of a WKWebView.

My web view is embedded within a larger UIScrollView container, and therefore I need to determine the ideal size for the web view.  This will allow me to modify its frame to show all of its HTML content without the need to scroll within the web view, and I will be able to set the correct height for the scroll view container (by setting scrollview.contentSize).

I have tried sizeToFit and sizeThatFits without success.  Here is my code that creates a WKWebView instance and adds it to the container scrollview:

    // self.view is a UIScrollView sized to something like 320.0 x 400.0.
    CGRect wvFrame = CGRectMake(0, 0, self.view.frame.size.width, 100.0);
    self.mWebView = [[[WKWebView alloc] initWithFrame:wvFrame] autorelease];
    self.mWebView.navigationDelegate = self;
    self.mWebView.scrollView.bounces = NO;
    self.mWebView.scrollView.scrollEnabled = NO;

    NSString *s = ... // Load s from a Core Data field.
    [self.mWebView loadHTMLString:s baseURL:nil];

    [self.view addSubview:self.mWebView];

Here is an experimental didFinishNavigation method:

    - (void)webView:(WKWebView *)aWebView
                                 didFinishNavigation:(WKNavigation *)aNavigation
    {
        CGRect wvFrame = aWebView.frame;
        NSLog(@&quot;original wvFrame: %@\n&quot;, NSStringFromCGRect(wvFrame));
        [aWebView sizeToFit];
        NSLog(@&quot;wvFrame after sizeToFit: %@\n&quot;, NSStringFromCGRect(wvFrame));
        wvFrame.size.height = 1.0;
        aWebView.frame = wvFrame;
        CGSize sz = [aWebView sizeThatFits:CGSizeZero];
        NSLog(@&quot;sizeThatFits A: %@\n&quot;, NSStringFromCGSize(sz));
        sz = CGSizeMake(wvFrame.size.width, 0.0);
        sz = [aWebView sizeThatFits:sz];
        NSLog(@&quot;sizeThatFits B: %@\n&quot;, NSStringFromCGSize(sz));
    }

And here is the output that is generated:

    2014-12-16 17:29:38.055 App[...] original wvFrame: {{0, 0}, {320, 100}}
    2014-12-16 17:29:38.055 App[...] wvFrame after sizeToFit: {{0, 0}, {320, 100}}
    2014-12-16 17:29:38.056 App[...] wvFrame after sizeThatFits A: {320, 1}
    2014-12-16 17:29:38.056 App[...] wvFrame after sizeThatFits B: {320, 1}

The sizeToFit call has no effect and sizeThatFits always returns a height of 1.

How to determine the content size of a WKWebView?

I&#39;ve an app that uses **WkWebView** to play audio from Soundcloud, on iOS 13 Beta 6 the audio stops when the app is not in foreground,
even when **Audio** is on in **Background Modes**.

When starting the playback this assertion is thrown:

    Error acquiring assertion: &lt;NSError: 0x282cf67c0; domain: RBSAssertionErrorDomain; code: 2; reason: &quot;Required client entitlement is missing&quot;&gt; {
    userInfo = {
        RBSAssertionAttribute = &lt;RBSLegacyAttribute: 0x1592432e0; requestedReason: MediaPlayback; reason: MediaPlayback; flags: PreventTaskSuspend | PreventTaskThrottleDown | WantsForegroundResourcePriority&gt;;
    } 
   
And after entering background state, the following assertion is thrown and the audio is suspended:

    Can&#39;t end BackgroundTask: no background task exists with identifier 13 (0xd), or it may have already been ended. Break in UIApplicationEndBackgroundTaskError() to debug. 
    [ProcessSuspension] Background task expired while holding WebKit ProcessAssertion (isMainThread? 1).

This is not happening in iOS 12, where the audio plays normally when it is in background.


iOS 13 - WkWebView: audio stops when in background

### Problem
Using `WKWebView` in place of `UIWebView`, I noticed that the contents of the `WKWebView` were massively scaled down as compared to my `UIWebView`. I&#39;d like the `WKWebView` to stop doing that, and just respect my CSS values literally, the way `UIWebView` would.

### Context
I use web views in my native iOS app for the contents that go inside popovers on an iPad where I&#39;m displaying informational content. It&#39;s great being able to give this to content and design folks and say, &quot;just drop in some HTML content, referencing the linked CSS file&quot;. 

All of this worked just great when using `UIWebView`.

But popovers are often quite compact.

### What I&#39;m Experiencing

In my narrow popovers, the content is scaled down as if my content where an entire web page being miniaturized to fit. I can see that WKWebView was primarily intended for folks building alternate browsers on iOS or building hybrid apps, where the WKWebView is essentially, taking over the screen.

The magnification factor in WKWebView is not something one can set. Sure, the user can zoom in, but that defeats the purpose. I&#39;m not looking for a zoomed in viewport; I&#39;m looking for the entire content to fit and word-wrap like it would with UIWebView.

With WKWebView, in the simulator, I&#39;ll see the sizing I want if I bump up my body text size to 50px instead of 14px. This code however, doesn&#39;t even help when on the device, so inflating my CSS sizes is not an option either!


### What&#39;s Wrong with UIWebView?

Well, nothing really. It&#39;s not (yet) deprecated in iOS8, perhaps b/c it has usefulness still, as I&#39;m experiencing. I did notice however, that WKWebView was fast. And I&#39;ve seen some speculation that the writing is on the wall for UIWebView. I thought: &quot;Why not adopt the more modern API in iOS8 now?&quot;

So, I continue to use UIWebView for now, but I&#39;d like to switch over to WKWebView if I could get it to respect my CSS sizing.

Here&#39;s my original CSS that UIWebView renders nicely, but which WKWebView in a popover will render in really tiny fonts:

&lt;!-- language: lang-css --&gt;

    body {
        font-family: &quot;HelveticaNeue&quot;;
    	font-size: 15px;
    	line-height: 17px;
    	color: #000000;
    }
    
    h1 {
        font-family: &quot;HelveticaNeue-Bold&quot;;
    	font-size: 18px;
    	line-height: 20px;
    	color: #000000;
    }
    
    
    h2 {
        font-family: &quot;HelveticaNeue-Bold&quot;;
    	font-size: 16px;
    	line-height: 18px;
    	color: #000000;
    }



Suppress WKWebView from scaling content to render at same magnification as UIWebView does

I am having some trouble getting a WKWebView in iOS 8 to display an alert dialog that is called from Javascript. After creating a standard WKWebView and loading an HTML file, I have a button on the page that creates a simple alert with some text. This works in UIWebView and in Google Chrome/Safari, but does not appear to be working in WKWebView. Any help is appreciated.

My setup is as follows:

    WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
    config.allowsInlineMediaPlayback = YES;
    config.mediaPlaybackRequiresUserAction = false;
    _wkViewWeb = [[WKWebView alloc] initWithFrame:_viewWeb.frame config];
    _wkViewWeb.scrollView.scrollEnabled = NO;
    NSString *fullURL = @&quot;file://.../TestSlide.html&quot;;
    NSURL *url = [NSURL URLWithString:fullURL];
    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10];
	
    [_wkViewWeb loadRequest:request];

The html has the following function:

    &lt;SCRIPT Language=&quot;JavaScript&quot;&gt;
    function alertTest() {
        alert(&quot;Testing Alerts&quot;);
    }
    &lt;/SCRIPT&gt;

And a button:

    &lt;b&gt;Test Alerts: &lt;input type=&quot;button&quot; value=&quot;Alert Popup&quot; onclick=&quot;alertTest()&quot;&gt;&lt;br&gt;&lt;/b&gt; &lt;br&gt;

This setup works in UIWebView and in regular browsers, but does not work in WKWebView. Am I missing something in the configuration? Should I be using one of the WK delegates to control the alert/confirm dialog behavior? Thank you.

iOS WKWebView not showing javascript alert() dialog

while getting cookies from `UIWebView` seems straightforward by using `NSHTTPCookieStorage.sharedHTTPCookieStorage()`, it seems `WKWebView` stores the cookies somewhere else.

I did some research, and I was able to get some cookies from the grabbing it from `NSHTTPURLResponse` object. this, however, does not contain all the cookies used by `WKWebView`:

    func webView(webView: WKWebView, decidePolicyForNavigationResponse navigationResponse: WKNavigationResponse, decisionHandler: (WKNavigationResponsePolicy) -&gt; Void) {
    
      if let httpResponse = navigationResponse.response as? NSHTTPURLResponse {
        if let headers = httpResponse.allHeaderFields as? [String: String], url = httpResponse.URL {
          let cookies = NSHTTPCookie.cookiesWithResponseHeaderFields(headers, forURL: url)
          
          for cookie in cookies {
            logDebug(cookie.description)
            
            logDebug(&quot;found cookie &quot; + cookie.name + &quot; &quot; + cookie.value)
          }
        }
      }
    }


Strangely, there&#39;s also a class `WKWebsiteDataStore` in ios 9 that responsible for managing cookies in `WKWebView`, however, the class does not contain a public method to retrieve the cookies data:

    let storage = WKWebsiteDataStore.defaultDataStore()
      
    storage.fetchDataRecordsOfTypes([WKWebsiteDataTypeCookies], completionHandler: { (records) -&gt; Void in
      for record in records {
        logDebug(&quot;cookie record is &quot; + record.debugDescription)
          
        for dataType in record.dataTypes {
          logDebug(&quot;data type is &quot; + dataType.debugDescription)
            
          // get cookie data??
        }
      }
    })


Is there a workaround for getting the cookie data?

Getting all cookies from WKWebView

With ObjectiveC I am developing a SingleView app targeting iOS 11 having one view controller/view. In the Main.storyboard on top of the view I&#39;ve dropped a WebKit View (WKWebView). 

I am seeing a crash in both the Simulator and on an iPhone 6 running iOS 11.0.1 :

**Terminating app due to uncaught exception &#39;NSInvalidUnarchiveOperationException&#39;, reason: &#39;Could not instantiate class named WKWebView&#39;**


Do I need anything else to have it working ? Looks like it&#39;s unable to instantiate WKWebView upon waking from storyboard.


Other details:

 - Xcode version 9.0 9A235
 - When I remove the WKWebView from the Storyboard the crash goes away
 - App Base SDK - latest iOS (iOS 11); Deployment target 11.0
 - Using the WebView(deprecated) -- UIWebView, it works
 - I did not attempt to instantiate it manually


 
Crash stack:

    2017-11-06 18:38:27.765519+0200 XYZZMap[15689:1093338] *** Terminating app due to uncaught exception &#39;NSInvalidUnarchiveOperationException&#39;, reason: &#39;Could not instantiate class named WKWebView&#39;
    *** First throw call stack:
    (
    	0   CoreFoundation                      0x00000001056d01cb __exceptionPreprocess + 171
    	1   libobjc.A.dylib                     0x0000000105032f41 objc_exception_throw + 48
    	2   CoreFoundation                      0x0000000105744b95 +[NSException raise:format:] + 197
    	3   UIKit                               0x000000010692d2c0 UINibDecoderDecodeObjectForValue + 323
    	4   UIKit                               0x000000010692d5db UINibDecoderDecodeObjectForValue + 1118
    	5   UIKit                               0x000000010692d172 -[UINibDecoder decodeObjectForKey:] + 89
    	6   UIKit                               0x00000001062f866b -[UIView initWithCoder:] + 969
    	7   UIKit                               0x000000010692d43d UINibDecoderDecodeObjectForValue + 704
    	8   UIKit                               0x000000010692d172 -[UINibDecoder decodeObjectForKey:] + 89
    	9   UIKit                               0x00000001066dd1a7 -[UIRuntimeConnection initWithCoder:] + 178
    	10  UIKit                               0x000000010692d43d UINibDecoderDecodeObjectForValue + 704
    	11  UIKit                               0x000000010692d5db UINibDecoderDecodeObjectForValue + 1118
    	12  UIKit                               0x000000010692d172 -[UINibDecoder decodeObjectForKey:] + 89
    	13  UIKit                               0x00000001066dc3a4 -[UINib instantiateWithOwner:options:] + 1262
    	14  UIKit                               0x00000001063f8d07 -[UIViewController _loadViewFromNibNamed:bundle:] + 383
    	15  UIKit                               0x00000001063f9610 -[UIViewController loadView] + 177
    	16  UIKit                               0x00000001063f9941 -[UIViewController loadViewIfRequired] + 195
    	17  UIKit                               0x00000001063fa19e -[UIViewController view] + 27
    	18  UIKit                               0x00000001062cdd17 -[UIWindow addRootViewControllerViewIfPossible] + 122
    	19  UIKit                               0x00000001062ce41f -[UIWindow _setHidden:forced:] + 294
    	20  UIKit                               0x00000001062e12bf -[UIWindow makeKeyAndVisible] + 42
    	21  UIKit                               0x0000000106255015 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4711
    	22  UIKit                               0x000000010625a245 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1720
    	23  UIKit                               0x0000000106615c6c __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 924
    	24  UIKit                               0x00000001069e33ef +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
    	25  UIKit                               0x0000000106615865 -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 249
    	26  UIKit                               0x00000001066160c3 -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 668
    	27  UIKit                               0x0000000106f73c11 __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 262
    	28  UIKit                               0x0000000106f73aca -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 444
    	29  UIKit                               0x0000000106c61b9c __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 420
    	30  UIKit                               0x0000000106e5cc3e _performActionsWithDelayForTransitionContext + 100
    	31  UIKit                               0x0000000106c61998 -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 231
    	32  UIKit                               0x00000001069e2a4c -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
    	33  UIKit                               0x0000000106258ac6 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 523
    	34  UIKit                               0x0000000106821523 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 369
    	35  FrontBoardServices                  0x000000010b539158 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 338
    	36  FrontBoardServices                  0x000000010b541c4d __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 235
    	37  libdispatch.dylib                   0x00000001096b643c _dispatch_client_callout + 8
    	38  libdispatch.dylib                   0x00000001096bbaf4 _dispatch_block_invoke_direct + 592
    	39  FrontBoardServices                  0x000000010b56d672 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
    	40  FrontBoardServices                  0x000000010b56d328 -[FBSSerialQueue _performNext] + 464
    	41  FrontBoardServices                  0x000000010b56d897 -[FBSSerialQueue _performNextFromRunLoopSource] + 45
    	42  CoreFoundation                      0x00000001056732b1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    	43  CoreFoundation                      0x0000000105712d31 __CFRunLoopDoSource0 + 81
    	44  CoreFoundation                      0x0000000105657c19 __CFRunLoopDoSources0 + 185
    	45  CoreFoundation                      0x00000001056571ff __CFRunLoopRun + 1279
    	46  CoreFoundation                      0x0000000105656a89 CFRunLoopRunSpecific + 409
    	47  GraphicsServices                    0x000000010be609c6 GSEventRunModal + 62
    	48  UIKit                               0x000000010625bd30 UIApplicationMain + 159
    	49  XYZZMap                             0x00000001047274bf main + 111
    	50  libdyld.dylib                       0x0000000109732d81 start + 1
    	51  ???                                 0x0000000000000001 0x0 + 1
    )
    libc++abi.dylib: terminating with uncaught exception of type NSException


Thanks!

iOS11 WKWebview crash due to NSInvalidUnarchiveOperationException

I&#39;m trying to understand how to make use of the new WKWebView in iOS8, can&#39;t find much information. I&#39;ve read:

http://developer.telerik.com/featured/why-ios-8s-wkwebview-is-a-big-deal-for-hybrid-development/
http://nshipster.com/wkwebkit/

But how does this affect existing apps? Will an ordinary UiWebView get the speedup from the nitro java script engine or do we need to make changes? How do we deal with backwards compatibility?

All the code and examples I can find are using swift, will this be mandatory?

Thankful for any help on this matter!

How to Migrate to WKWebView?

Within my app I am want to open links from within *my* domain (e.g.: communionchapelefca.org) in WKWebView but then have links from *other* domains open in Safari. I would prefer to do this programmatically.

I have found a few solutions on Stack overflow ([here][1], [here][2], [here][3], and [here][4]) but they all seem to be Obj-C based and I am looking for a solution using Swift.

ViewController.swift:

    import UIKit
    import WebKit
    
    class ViewController: UIViewController {
    
        override func viewDidLoad() {
            super.viewDidLoad()
            
            let myWebView:WKWebView = WKWebView(frame: CGRectMake(0, 0,   UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
            
            myWebView.loadRequest(NSURLRequest(URL: NSURL(string: &quot;http://www.communionchapelefca.org/app-home&quot;)!))
            
            self.view.addSubview(myWebView)


  [1]: https://stackoverflow.com/questions/5899990/objective-c-open-links-from-uiwebview-in-safari
  [2]: https://stackoverflow.com/questions/3594136/uiwebview-open-certain-links-in-safari-not-all
  [3]: https://stackoverflow.com/questions/15537289/open-webview-links-in-safari
  [4]: https://stackoverflow.com/questions/27464407/limit-uiwebview-to-specific-url-swift

WKWebView open links from certain domain in safari

I changed `UIWebView` to `WKWebView`, however, with the same html, the font in `WKWebView` looks like smaller than in `UIWebView`. I don&#39;t want this happen, so is there any way to avoid this change?

The font looks like smaller in WKWebView than in UIWebView

I want to load HTML pages using WkWebView and I want to show the page just after it&#39;s finished loading. As long as it&#39;s loading I would like to show an activity indicator on an empty View. 
I create two view a loadingView and a wkWebView. While the page is loading I add to VC as subview the loadingView and after I want to remove loadingView and add wkWebView. Here is my code:

        [self addSubview:_loadingView];
        _wkWebView = [[WKWebView alloc] initWithFrame:self.frame];
        _wkWebView.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width, self.frame.size.height);
        
        //Send a request to wkUrlconnection
        NSURL *wkUrl = [NSURL URLWithString:self.wkUrlString];
        NSURLRequest *wkRequest = [NSURLRequest requestWithURL:wkUrl];

        //Here I want to check if it&#39;s loaded and then remove loadingView and add wkWebView
        [_wkWebView loadRequest:wkRequest];
        [self.loadingView removeFromSuperview];
        [self addSubview:_wkWebView];

Can someone show me how to check while it&#39;s loading and if finish refresh the VC? Thank you for your answers.


How to check if WkWebView finish loading in Objective-C?

Using a WKWebView in iOS 8, how can I run a JavaScript function from the native side or otherwise communicate from the native side to JavaScript? There doesn&#39;t appear to be a method akin to UIWebView&#39;s `stringByEvaluatingJavaScriptFromString:`.

(I can use `- addScriptMessageHandler:name:` on the `configuration.userContentController` object to allow communication from JS to native, but I&#39;m looking for the opposite direction.)

Call JavaScript function from native code in WKWebView

I&#39;m looking for a way to disable the &quot;pinch to zoom&quot; magnification gesture on the iOS implementation of WKWebView. There is a magnification BOOL property available for OS X but it doesn&#39;t seem to be available on iOS.

WKWebView.h

    #if !TARGET_OS_IPHONE
    /* @abstract A Boolean value indicating whether magnify gestures will
     change the web view&#39;s magnification.
     @discussion It is possible to set the magnification property even if
     allowsMagnification is set to NO.
     The default value is NO.
     */
    @property (nonatomic) BOOL allowsMagnification;

I&#39;ve, also, tried look at the WKWebView&#39;s gesture recognizers but that seems to be turning up an empty array. I&#39;m assuming the actual recognizers are bured deeper in the component&#39;s structure (fairly complex, by the looks of it) and would rather not go digging for them if at all possible.

I know of possible hacks that could potentially disable the gesture from firing (selectively passing gestures to the WebView, add child view to capture pinch gesture, etc) but I&#39;ve always found those introduce lag into the event and want to keep the implementation as clean/hack free as possible.

Disable magnification gesture in WKWebView

I&#39;m using custom fonts in my app. They are copied to bundle and hardcoded to appName-info.plist.
This fonts works perfectly in the whole app and in UIWebView.

Im loading htmlString 
`[webView loadHTMLString:htmlString baseURL:nil];`
I use this fonts in webView with css:
`fontFamily: fontName`

But when i try to use WkWebView custom fonts not working. WkWebView displays random default fonts.


I tried to load it with main bundle path in base url and using font-face in css - WkWebView still displays random fonts.

How can I make custom fonts work in WKWebView?

Using custom fonts in WKWebView

Any one worked with `WKWebview` and tried to clear cache ? If yes, how to do? any example ?

**P.S. :** Normal NSURLCache is not working. 

How to remove cache in WKWebview?

I log into a website using WKWebView and now i would like to parse the html of the website. How can I access the websites html in swift? I know how it works for a UIWebView but not for WKWebView.

Thanks for your help!

Get HTML from WKWebview in Swift

I have a module inside my iOS 7+ app which is a UIWebView. The html page loads a javascript that creates custom-shaped buttons (using the Raphaeljs library). With UIWebView, I set delegate to self. The delegate method `webView: shouldStartLoadWithRequest: navigationType:` is called each time one of my custom button is pressed. The requests should not be handled by the html, but rather by the iOS code. So I used a request convention (read somewhere here on stackoverflow) using &quot;inapp&quot; as the scheme of my requests. I then check for the host and take the appropriate action.

This code works fine on iOS 7. But the web views appear blank on iOS 8 (bug?), so I decided to use WKWebView for iOS 8 devices. The web views now render fine (and amazingly faster!), but my buttons have no effect.

I tried using `- (WKNaviation *)loadRequest:(NSURLRequest *)request`, but it&#39;s not called.

I can&#39;t find a direct equivalent of the UIWebView delegate method `webView: shouldStartLoadWithRequest: navigationType:`. What&#39;s the best way of handling those requests with WKWebView?

UIWebView delegate method shouldStartLoadWithRequest: equivalent in WKWebView?

In my app I wish to make the WKWebView with transparent background, so the view behind (an ImageView) can show through as background picture.
 
        webView!.opaque = false
        webView!.backgroundColor = UIColor.clearColor()
 
The code above works fine with UIWebView, but if webView is WKWebView, a white background will be shown.

Also tried putting transparent background color in CSS. The result is the same, only works in UIWebView but not WKWebView. Any suggestion?

Transparent background for WKWebView

How do I set a custom useragent string in a WKWebView? I&#39;m trying to embed the version of my app so that my server-side can see what features are available. I found the following method:

    let userAgent = &quot;MyApp/1.33.7&quot;
    request.setValue(userAgent, forHTTPHeaderField: &quot;User-Agent&quot;)

    NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) {(response, data, error) in
        let content = NSString(data: data, encoding: NSUTF8StringEncoding)
        self.web!.loadHTMLString(content!, baseURL: url)
    }
    self.web!.loadRequest(request);
But this means the useragent is only set for that single request. The first other request (e.g. a forward), will mean the useragent is reset to default again. How can I more permanently configure the wkwebview to use my custom useragent string?

Set useragent in WKWebview

[Apple&#39;s recommendation][1]:

&gt; In apps that run in iOS 8 and later, use the WKWebView class instead of using UIWebView.

Thus, I have replaced my good old `UIWebView` with a shiny new `WKWebView`. But what I thought to be an easy exercise (simply swapping the classes and replacing the delegate methods) turned out to be a real mess.

# The Problem

When I load an HTML string using

    loadHTMLString(String, baseURL: URL?)

the web view loads and renders the pure HTML but **it doesn&#39;t load any images or CSS files referenced inside the `htmlString`**.

This happens **only on a real device**!&lt;br /&gt;
In Simultor all referenced resources are loaded correctly.

[![Simulator][2]][2]
[![Real Device][3]][3]

### *Example*

I have defined a simple `htmlString` in my view controller class:

    let imageName = &quot;image.png&quot;
    
    let libraryURL: URL // The default Library URL

    var htmlString: String {
        return &quot;&lt;html&gt; ... &lt;img src=\&quot;\(imageName)\&quot; /&gt; ... &lt;/html&gt;&quot;
        // &quot;...&quot; represents more valid HTML code incl. header and body tags
    }

The image is stored in the root Library folder so its URL is:

    let imageURL = libraryURL.appendingPathComponent(imageName)

Now I load the `htmlString` into the web view:

    webView.loadHTMLString(htmlString, baseURL: libraryURL)

and it doesn&#39;t load the image even though the `baseURL` is set correctly.

# Ideas for a Solution

1. Maybe `WKWebView` has a problem with resolving relative paths so my first idea was to use **absolute paths** inside the HTML string instead.&lt;br /&gt;
    → ❌ Doesn&#39;t work.

2. Two answers to [another SO post][4] suggested that using&lt;br /&gt;
    `loadFileURL(URL, allowingReadAccessTo: URL)`&lt;br /&gt;
   instead of `loadHTMLString(...)` works in iOS 9+.&lt;br /&gt;
   → ✅ That works.

However, I cannot use solution 2 because my HTML files are encrypted and the decrypted files must not be stored on the disk.

# Question

Is there any way to load local resources like images and styles using the `WKWebView`&#39;s

    loadHTMLString(String, baseURL: URL?)

function? Or is still a bug in iOS 9+?

*(I just cannot believe that Apple provides and recommends using a web view that cannot load any local web content from inside an HTML string?!)*


  [1]: https://developer.apple.com/reference/uikit/uiwebview#overview
  [2]: http://i.stack.imgur.com/2f84l.png
  [3]: http://i.stack.imgur.com/bDCwA.png
  [4]: https://stackoverflow.com/questions/24882834/wkwebview-not-loading-local-files-under-ios-8

WKWebView fails to load images and CSS using loadHTMLString(_, baseURL:)

I need to change a function to evaluate JavaScript from UIWebView to WKWebView. I need to return result of evaluating in this function. 

Now, I am calling:

    [wkWebView evaluateJavaScript:call completionHandler:^(NSString *result, NSError *error)
    {
        NSLog(@&quot;Error %@&quot;,error);
        NSLog(@&quot;Result %@&quot;,result);
    }];

But I need get result like return value, like in `UIWebView`.
Can you suggest a solution?

WKWebView evaluate JavaScript return value

I am using a `WKWebView` in my native iPhone application, on a website that allows login/registration, and stores the session information in cookies.   I am trying to figure out how to persistently store the cookie information, so when the app restarts, the user still has their web session available.

I have 2 `WKWebViews` in the app, and they share a `WKProcessPool`.  I start with a shared process pool:

`WKProcessPool *processPool = [[WKProcessPool alloc] init];`

Then for each WKWebView:

    WKWebViewConfiguration *theConfiguration = [[WKWebViewConfiguration alloc] init]; 
    theConfiguration.processPool = processPool; 
    self.webView = [[WKWebView alloc] initWithFrame:frame configuration:theConfiguration];

When I log in using the first `WKWebView`, and then some time later pass the action to the 2nd `WKWebView`, the session is retained, so the cookies were successfully shared.  However, when I relaunch the app, a new process pool is created and the session information is destroyed.  Is there any way to get the session information to persist through an app restart?

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