在Webview（UWP）中启用触摸事件

Question

I need to enable touch events in a webview in an UWP-app (Universal Windows Platform).

It is possible to set this flag in the local installed edge browser: Type "about:flags" in the edge browser and move to "Touch events". Default it is set to "Always off".

Can i set this flag programmatically in a webview instance in my UWP-app?

Background: I need all touch events in a website to pan a digital map.

Let me know if you need more information.

Webview: https://docs.microsoft.com/en-us/uwp/api/windows.ui.xaml.controls.webview

Answer 1

Unfortunately, as indicated in the Events table, WebView doesn't support most of the user input events inherited from UIElement , such as KeyDown , KeyUp , and PointerPressed . Details please reference the remarks of the WebView class. And the relative team is working on enable Manipulation Events for WebView that you may vote that.

As the remarks mentioned, a common workaround is to use InvokeScriptAsync with the JavaScript eval function to use the HTML event handlers, and to use window.external.notify from the HTML event handler to notify the application using WebView.ScriptNotify . In another words, you may try to capture the touch events inside the website by JavaScript and notify the WebView . For details about how do to please reference the WebView official sample .