wkwebview not showing anything but a white screen

Question

I am trying to show a WKWebView over another view using the presentViewController method but only shows a white screen.

I have implemented the WKWebView in my ViewController.m as follows:

- (void)viewDidLoad {
  [super viewDidLoad];
  WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
  _webView = [[WKWebView alloc] initWithFrame:self.view.frame
                                 configuration:configuration];
  _webView.navigationDelegate = self;
  [_webView loadRequest:[NSURLRequest requestWithURL:url]];
  [self.view addSubview:_webView];
}

then in another class I have a method with the following code:

AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
ViewController *webView1 =[[ViewController alloc] init];

[delegate.window.rootViewController presentViewController: webView1 
                                                 animated:YES completion:nil];

This last code "presents" a white screen on top of my rootViewController. I have no clue of why my webView is a white screen.

You might want to check your URL to make sure the request is valid. Also, make sure that you are using HTTPS in the url or that you have disabled/set the appropriate values for ATS in the plist file. ATS is enabled by default so if you are not using the HTTPS protocol the request will be blocked. — Dennis W., May 04 '16 at 03:03
@dkw5877 I double checked. I am using HTTPS in my link: `NSURL *url = [NSURL URLWithString:@"https://github.com"];` — Andres C. Viesca, May 04 '16 at 03:06
Are you calling the `presentViewController ` method in `viewDidLoad`? If so, try this [link](http://stackoverflow.com/questions/11862883/whose-view-is-not-in-the-window-hierarchy) and see if that helps. — Dennis W., May 04 '16 at 03:37
@dkw5877 I am calling it on a separate class, `presentViewController` works correctly, it covers my root view with my webview but it only displays a white screen. — Andres C. Viesca, May 04 '16 at 04:48
Why ViewController *webView1 =[[ViewController alloc] init]; you are not using storyboard or xib ? — Prashant Tukadiya, May 04 '16 at 05:14
@PKT `WKWebView` its not available there. It can only be used programatically as far as I know. — Andres C. Viesca, May 04 '16 at 05:41
@AndresC.Viesca my point is your view controller does not contain any xib or storyboard reference ? — Prashant Tukadiya, May 04 '16 at 05:55
ya it needed to check that, set background color of your view where you are added webview and also check background color from where you are presenting view controller — Prashant Tukadiya, May 04 '16 at 06:10
@AndresC.Viesca in the class where you are presenting the webview1 controller, in what method are you calling presentViewController? — Dennis W., May 04 '16 at 20:44
@PKT I verified it, it is being called. I can visually see how the web view is presented with an animation. — Andres C. Viesca, May 05 '16 at 00:48
implement delegate method - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error { NSLog(@"Error : %@",error); } see there — Prashant Tukadiya, May 05 '16 at 04:36

score 1 · Answer 1 · answered Jul 14 '19 at 06:49

What URL are you loading?

It might be that you need to add to your plist file permissions to load a non-secure URL.

Add this to your plist and see if that works.

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

For more info, see here: https://ooiks.com/2017/10/15/ios-wkwebview-return-a-blank-screen-white-screen/

Also make sure that the URL you are trying uses HTTP or HTTPS. Make sure that UIApplication.shared.canOpenURL(url : URL(string: yourURLString)) returns true for your URL.

score -2 · Answer 2 · answered May 05 '16 at 08:21

So, I found why it was just showing a white screen. Turns out that you have to wrap the WKWebView with a UINavigationController.

By adding:

UINavigationController *controller = [[UINavigationController alloc] initWithRootViewController: _webView];

to my custom method in my custom class and then present the controller I just created instead of the _webView:

 [delegate.window.rootViewController presentViewController: controller animated:YES completion:nil];

Works fine now.

You don't "have to wrap the WKWebview" with a UINavigationController. Mine is working without a navigation controller. — ScottyBlades, Apr 08 '22 at 21:46

wkwebview not showing anything but a white screen

2 Answers2