How do you get the location of touches for a UILongPressGestureRecognizer when the number of required touches is more than one in swift?

Question

I would like to get the location of multiple multiple touches from a UILongPressGuestureRecognizer where the number of required touches is more than one. I know that I can do the following to get the location when one finger is used.

let twoFingerLongPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(twoFingerLongPressChordTouchView(gesture:)))
twoFingerLongPressGesture.numberOfTouchesRequired = 2
twoFingerLongPressGesture.minimumPressDuration = 0.02
self.addGestureRecognizer(twoFingerLongPressGesture)

@objc func twoFingerLongPressAction(gesture: UILongPressGestureRecognizer) {
    let location = gesture.location(in: self)
}

I also know that I can iterate through touches in the touches began callback however I am trying to make use of a specific behavior in UILongPressGestureRecognizer. Thanks in advance for any help or advice!!!

score 1 · Accepted Answer · answered Aug 01 '20 at 04:20

You can use location(ofTouch:in:) in conjunction with numberOfTouches:

let touchPoints = (0..<twoFingerLongPressGesture.numberOfTouches).map {
    twoFingerLongPressGesture.location(ofTouch: $0, in: self)
}

This gets you all the touched points in an array of CGPoints.

How do you get the location of touches for a UILongPressGestureRecognizer when the number of required touches is more than one in swift?

1 Answers1