同时解除捏合和旋转手势

Question

我已经成功实施了手势，允许用户使用UIGuestureRecognizers放大和旋转视图。然而，用户不能同时做两个手势（即同时旋转和缩放）。我怎么能这样做呢？以下是我添加手势的方法

var rotateRecognizer = UIRotationGestureRecognizer(target: self, action: "handleRotate:")
var pinchRecognizer = UIPinchGestureRecognizer(target: self, action: "handlePinch:")

testV.addGestureRecognizer(rotateRecognizer)
testV.addGestureRecognizer(pinchRecognizer)

Answer 1

在swift 3中，委托方法名称为：

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

您还需要为手势设置委托：

rotateRecognizer.delegate = self
pinchRecognizer.delegate = self

Answer 2

刚刚添加了这个并且它有效：

func gestureRecognizer(UIGestureRecognizer,
        shouldRecognizeSimultaneouslyWithGestureRecognizer:UIGestureRecognizer) -> Bool {
            return true
    }

Answer 3

let rotateGesture = UIRotationGestureRecognizer（target：self，action：#selector（self.rotateGesture））

self.imageView.addGestureRecognizer（rotateGesture）

让pinchGesture = UIPinchGestureRecognizer（target：self，action：#selector（self.pinchGesture））   self.imageView.addGestureRecognizer（pinchGesture）

func rotateGesture(sender: UIRotationGestureRecognizer){
    sender.view?.transform = (sender.view?.transform)!.rotated(by: sender.rotation)
    sender.rotation = 0
    print("rotate gesture")
}
func pinchGesture(sender: UIPinchGestureRecognizer){
    sender.view?.transform = (sender.view?.transform)!.scaledBy(x: sender.scale, y: sender.scale)
    sender.scale = 1
    print("pinch gesture")
}