How to disable scrolling entirely in a WKWebView?

Question

I know this looks like a simple question one can simply say:

webview.scrollView.scrollEnabled = NO;
webview.scrollView.panGestureRecognizer.enabled = NO;
web         


        

Answer 1

Took me a while but I figured out a way of doing this.

I had to remove a private gesture recognizer within a private subview of the WKWebView.

I had a category on WKWebView to do so:

@implementation WKWebView (Scrolling)

- (void)setScrollEnabled:(BOOL)enabled {
    self.scrollView.scrollEnabled = enabled;
    self.scrollView.panGestureRecognizer.enabled = enabled;
    self.scrollView.bounces = enabled;

    // There is one subview as of iOS 8.1 of class WKScrollView
    for (UIView* subview in self.subviews) {
        if ([subview respondsToSelector:@selector(setScrollEnabled:)]) {
            [(id)subview setScrollEnabled:enabled];
        }

        if ([subview respondsToSelector:@selector(setBounces:)]) {
            [(id)subview setBounces:enabled];
        }

        if ([subview respondsToSelector:@selector(panGestureRecognizer)]) {
            [[(id)subview panGestureRecognizer] setEnabled:enabled];
        }

        // here comes the tricky part, desabling
        for (UIView* subScrollView in subview.subviews) {
            if ([subScrollView isKindOfClass:NSClassFromString(@"WKContentView")]) {
                for (id gesture in [subScrollView gestureRecognizers]) {
                    if ([gesture isKindOfClass:NSClassFromString(@"UIWebTouchEventsGestureRecognizer")])
                        [subScrollView removeGestureRecognizer:gesture];
                }
            }
        }
    }

}


@end

Hope this helps anyone some day.

Answer 2

Here's a swift version if anyone's still having trouble with this issue

let subviews = self.theWebView.scrollView.subviews
   for subview in subviews{
      if(subview.isKindOfClass(NSClassFromString("WKContentView"))){
                if let recognizers = subview.gestureRecognizers {
                    for recognizer in recognizers! {
                        if recognizer.isKindOfClass(NSClassFromString("UIWebTouchEventsGestureRecognizer")){
                           subview.removeGestureRecognizer(recognizer as! UIGestureRecognizer)
                        }
                    }
                }
            }
        }

Answer 3

Swift 5

disableScrollView(self.webView)

func disableScrollView(_ view: UIView) {
    (view as? UIScrollView)?.isScrollEnabled = false
    view.subviews.forEach { disableScrollView($0) }
}

Answer 4

Here is a C# extension for WKWebView based on alain.s's swift solution (based on apouche's solution) for those of us using Xamarin. I am using this in my app.

Notable differences is that I check if subviews exist before looping and instead of dynamically looking for a "WKContentView" (something I'm not sure is even possible in Xamarin) I simply check if each subview has GestureRecognizers and remove them. This will obviously disable all types of gestures so consider this if you expect any user interaction with the web content.

public static class WKWebViewExtension
    {
        public static void DisableScroll(this WebKit.WKWebView webView)
        {
            webView.ScrollView.ScrollEnabled = false;
            webView.ScrollView.PanGestureRecognizer.Enabled = false;
            webView.ScrollView.Bounces = false;

            if (webView.Subviews != null)
            {
                foreach (var subView in webView.Subviews)
                {
                    if (subView is UIScrollView)
                    {
                        UIScrollView subScrollView = (UIScrollView)subView;

                        subScrollView.ScrollEnabled = false;
                        subScrollView.Bounces = false;
                        subScrollView.PanGestureRecognizer.Enabled = false;
                    }

                    if (subView.Subviews != null)
                    {
                        foreach (var subScrollView in subView.Subviews)
                        {
                            if (subScrollView.GestureRecognizers != null)
                            {
                                foreach (var gesture in subScrollView.GestureRecognizers)
                                {
                                    subScrollView.RemoveGestureRecognizer(gesture);
                                }
                            }
                        }
                    }


                }
            }
        }
    }