SKNode scale from the touched point

Question

I have added UIPinchGestureRecognizer to my scene.view to scale my content. I actually scale the parent node where all my visible contents reside. But I have problem though

Answer 1

I have translated ninefifteen's solution for Swift and Pinch Gestures. I spent a couple days trying to get this to work on my own. Thank goodness for ninefifteen's Obj-C post! Here is the Swift version that appears to be working for me.

func scaleExperiment(_ sender: UIPinchGestureRecognizer) {


    var anchorPoint = sender.location(in: sender.view)

    anchorPoint = self.convertPoint(fromView: anchorPoint)

    let anchorPointInMySkNode = _mySkNode.convert(anchorPoint, from: self)

    _mySkNode.setScale(_mySkNode.xScale * sender.scale)

    let mySkNodeAnchorPointInScene = self.convert(anchorPointInMySkNode, from: _mySkNode)

    let translationOfAnchorInScene = (x: anchorPoint.x - mySkNodeAnchorPointInScene.x, y: anchorPoint.y - mySkNodeAnchorPointInScene.y)

    _mySkNode.position = CGPoint(x: _mySkNode.position.x + translationOfAnchorInScene.x, y: _mySkNode.position.y + translationOfAnchorInScene.y)

    sender.scale = 1.0


}