[iOS] Fast tap while subscribed to Tapped event, prevents Pointer events

[dr1rrb]

I'm submitting a...

• Bug report

Current behavior

If a GestureRecognizer is set on a UIView, then when it recognize a gesture, the "touches" are cancelled (i.e. the overridable TouchesCancelled in fired instead of the TouchesEnded in the UIElement). Sometimes, it may even prevent the TouchesBegan (if UI is big enough?).

This has multiple effects:

1. You may not receive the PointerReleased (has it's hooked to the TouchesEnded) (usually affect "pressed" visual state)
2. Tapped vs pointers events are not fired in the same order as Windows
3. Tapped may be fired while no pointers are raised

Expected behavior

As of windows, we should always (depending of capture, pointer moves, etc.) received events in the following sequence:

1. Pressed
2. Released
3. Tapped

Minimal reproduction of the problem with instructions

Cf. sample RoutedEvent_TappedAndRelease

More info / how to diagnose

You are probably affected by this bug if:

• Your UIElement does not react to "fast" tap, but reacts to "long tap" (keep your finger half a second on screen ... but lower than the "hold" delay).
• Your Control stays in "pressed" state.

Environment

Nuget Package: Uno.UI
Package Version(s): 1.45.0-dev.1450
Affected platform(s):

• iOS
• Android
• WebAssembly
• Windows
• Build tasks

Visual Studio: irrelevant
Relevant plugins: none