UIPinchGestureRecognizer

捏是兩指手勢，其中手指彼此靠近或遠離。此手勢通常用於調整檢視大小。

迅速

override func viewDidLoad() {
    super.viewDidLoad()

    // Pinch
    let pinchGesture = UIPinchGestureRecognizer(target: self, action: #selector(handlePinch(_:)))
    pinchView.addGestureRecognizer(pinchGesture)
}

// Pinch action
func handlePinch(gesture: UIPinchGestureRecognizer) {
    label.text = "Pinch recognized"

    if gesture.state == UIGestureRecognizerState.Changed {
        let transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale)
        pinchView.transform = transform
    }
}

筆記

• 這裡可以找到更完整的專案示例。