I have a custom control (a directional button with four parts; up, down, left, right) that uses beginTracking, continueTracking, etc.
When this control is in a modal view controller on iOS 13, any initial taps on the control work well, but after moving the touch even a small amount, cancelTracking is called.
While I can set the view controller to go full-screen, I'd like to keep the iOS 13 behavior of being able to dismiss it with the gesture. But it seems that that gesture is overriding any tracking of a control. The control is set to have isExclusiveTouch to 'true'.
NOTE: This also happens with standard iOS controls. e.g. a standard button. Touch the button and all is well. But once you track outside the button, it starts moving the view controller.
Got lucky and found a solution. One can add this to their custom control implementation:
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
false
}This prevents the modal gesture from canceling the tracking on the control. The modal gesture can still be used in areas outside the control to dimiss the modal.
