Xamarin Webview Gestures not firing - webview

Question

I want to add a pinch event to my webview and did so according to the Xamarin docs:
PinchGestureRecognizer pinch = new PinchGestureRecognizer();
pinch.PinchUpdated += ClearCache;
webview.GestureRecognizers.Add(pinch);
However, the event isn't firing. Is there something else I need to do to make it work?
Here's a messier scattergun approach with all solutions that I've come across that's also not working:
public class SettingsPage : ContentPage {
ICommand tapCommand;
public SettingsPage() {
var url = Path.Combine(DependencyService.Get<IBaseUrl>().Get(), "index.html");
WebView webview = new WebView() {
Source = new UrlWebViewSource { Url = url },
WidthRequest = 1000,
HeightRequest = 1000
};
//webview.Navigating += ClearCache; ********THIS WORKS*********
Padding = Device.OnPlatform<Thickness>(
new Thickness(1, 20, 1, 1),
new Thickness(1),
new Thickness(1)
);
PinchGestureRecognizer pinch = new PinchGestureRecognizer();
pinch.PinchUpdated += ClearCache;
webview.GestureRecognizers.Add(pinch);
tapCommand = new Command(OnTapped);
TapGestureRecognizer tap = new TapGestureRecognizer { NumberOfTapsRequired = 3 };
tap.Tapped += ClearCache;
tap.SetBinding(TapGestureRecognizer.CommandProperty, "TapCommand");
tap.Command = tapCommand;
webview.GestureRecognizers.Add(tap);
StackLayout stackLayout = new StackLayout { Spacing = 0 };
stackLayout.Children.Add(webview);
stackLayout.Children.Add(btnClearCache);
View parent = (View)webview.ParentView;
parent.GestureRecognizers.Add(tap);
parent.GestureRecognizers.Add(pinch);
Content = webview;
}
private void OnTapped(object obj) {
var service = DependencyService.Get<IPlatformService>();
service.ClearWebViewCache();
}
private void ClearCache(object sender, EventArgs e) {
var service = DependencyService.Get<IPlatformService>();
service.ClearWebViewCache();
}
public ICommand TapCommand {
get { return tapCommand; }
}

Answer 1

he WebView is quite nasty when it comes to gestures.
You can use MR.Gestures to handle the Down and Up gestures on iOS, Android and WinPhone 8.0 Silverlight. For Win Phone 8.1 / WinRT I didn't find a way yet.
If you only need iOS and Android, then all the gestures work on the WebView.
More info in the compatibility table on mrgestures.com.