WebView.Focused event works on Android, but not on iOS

[luczha]

Description

Steps to Reproduce

I create a StackLayout which contains a WebView .And I set the Focused event.It works fine in Android but not works in iOS.
webView.Focused += WebView_Focused;

private void WebView_Focused(object sender, FocusEventArgs e)
{
    //do some thing            
}

I think it because of in native iOS platform.UIWebview and WKWebview do not support focus event( in native iOS we call becomeFirstResponder ).

So,is there a solution to solve it?

Expected Behavior

Actual Behavior

Basic Information

• Version with issue:

• Last known good version:

• IDE:

• Platform Target Frameworks:

  • iOS: iOS 11.4

• Android Support Library Version:

• Nuget Packages:

• Affected Devices:

Screenshots

Reproduction Link

[samhouts]

Duplicate of #5616