TouchedUp event not firing; no tap behavior

[montehansen]

Describe the bug While testing the control I didn't see any visual tap behavior so I decided to add it via the TouchedUp event, but the event does not fire. I suspect both issues are related.

To Reproduce The control is being created from xaml using the provided example and run on ios 11 device and emulator. The event was wired using both xaml and code behind with no resulting difference; no event was fired.

Expected behavior Tap behavior feedback. TouchUp event to fire (I attempted to produce the behavior myself).

Please complete the following information:

• Which version of the FlexButton do you use? 0.8
• Which version of Xamarin.Forms do you use? 3.1.0.697729
• Which OS are you talking about? iOS 11.4.1

    async void Icon_TouchedUp(object sender, EventArgs e)
    {
      Opacity = .25;
      await Task.Delay(200);
      Opacity = 1;
    }

  <flex:FlexButton
    x:Name="icon"
    WidthRequest="50"
    HeightRequest="50"
    CornerRadius="25"
    HorizontalOptions="Center"
    Icon="smartphone.png"
    ForegroundColor="#ffffff"
    HighlightForegroundColor="#49516F"
    BackgroundColor="#6279B8" TouchedUp="Icon_TouchedUp"
    HighlightBackgroundColor="#8EA4D2" />

[montehansen]

Feel free to close after review. I think the issue is related to the AbsoluteLayout, not your library. I do not believe that the layout is cascading the events as it should. For instance, when I move the control outside of the AbsoluteLayout the control behaves as expected; likewise, I reproduced the same problem with a custom rendered Image as well.