Recognize long press and pan gesture recognizers together

Question

I have a view to which I've added both a pan and long press UIGestureRecognizer. The pan is used to move the view around. What I'd like to do is notice also that the touch has stopped moving (while remaining active) and trigger the long press.

What I find is that the long press is never triggered after the pan has begun. I've tried setting a delegate and implementing:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    NSLog(@"simultaneous %@", gestureRecognizer.class);
    return YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    NSLog(@"require fail %@", gestureRecognizer.class);

    return [gestureRecognizer isKindOfClass:[UIPanGestureRecognizer self]];
    // also tried return YES;
    // also tried return [gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer self]];
}

I've tried fooling with the pan gr's allowableMovement, also to no avail. I'm just about to give up and use a timer in the pan gr that get's invalidated and then reset on moves, but I was hoping that the SDK would do the state machine stuff for me.

Answer 1

First of we have to register both long press and pag gesture events like,

let longPress = UILongPressGestureRecognizer()
longPress.delegate = self
longPress.addTarget(self, action: #selector(sendMessageLongPress(_:)))

let panGesture = UIPanGestureRecognizer()
panGesture.delegate = self
panGesture.addTarget(self, action: #selector(sendMessagePanGesture(_:)))

self.imgRecord.addGestureRecognizer(longPress)
self.imgRecord.addGestureRecognizer(panGesture)

then we have to setup to capture multiple touch events via delegate method. For this we have to extend UIGestureRecognizerDelegate and then use,

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    return true
}

then we can implement events as we needed. (in my case I wanted to cancel recording audio if user swipes, then I had to consider about touch started point and touch ended point as needed.)