I want to get a callback when my UIPinchGestureRecognizer finished a pinch-gesture. Moreover it would be great to know if the finished gesture was a zoom in or a zoom out.I want to get a callback when my UIPinchGesture
阅读背景：
我怎样才能知道捏合手势何时结束（UIGestureRecognizer）
来源：互联网
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