Swift - 各种手势检测大全（UIGestureRecognizer及其子类）

UIGestureRecognizer 有许多子类，用于监听一些常见的手势事件，这些子类主要有：

1，UISwipeGestureRecognizer：滑动（快速移动）

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   let swipe = UISwipeGestureRecognizer(target:self, action:#selector(swipe(_:)))         swipe.direction = .up         self.view.addGestureRecognizer(swipe)     }           func swipe(_ recognizer:UISwipeGestureRecognizer){         print("swipe ok")         let point=recognizer.location(in: self.view)         //这个点是滑动的起点         print(point.x)         print(point.y)     } }

注意1：如果 UISwipeGestureRecognizer 在不指定方向的时候，默认向右滑动才会触发事件。如果要指定方向，需要设置 direction 属性

1 2	//表示监听滑动的方向为向上 swipe.direction = .up

注意2：有网友问如果各个方向都要响应怎么办，只要多定义几个 UISwipeGestureRecognizer 就可以了

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   let swipeUp = UISwipeGestureRecognizer(target:self, action:#selector(swipe(_:)))         swipeUp.direction = .up         self.view.addGestureRecognizer(swipeUp)                   let swipeDown = UISwipeGestureRecognizer(target:self, action:#selector(swipe(_:)))         swipeDown.direction = .down         self.view.addGestureRecognizer(swipeDown)     }           func swipe(_ recognizer:UISwipeGestureRecognizer){         if recognizer.direction == .up{             print("向上滑动")         }else if recognizer.direction == .down{             print("向下滑动")         }                   let point=recognizer.location(in: self.view)         //这个点是滑动的起点         print(point.x)         print(point.y)     } }

2，UIScreenEdgePanGestureRecognizer：边缘滑动 

（1）这个是 UISwipeGestureRecognizer 的子类，与后者不同的时。UIScreenEdgePanGestureRecognizer 只触发从边缘开始的划动操作，比如从左侧边缘开始向右滑动。
（2）UIScreenEdgePanGestureRecognizer 没有 direction 属性，增加了个 edges 属性。表示要响应哪个边缘的划动操作。可以是从左边缘向右滑动，或右边缘向左、上边缘向下、下边缘向上、或响应全部边缘滑动。

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   let swipe = UIScreenEdgePanGestureRecognizer(target:self, action:#selector(swipe(_:)))         swipe.edges = UIRectEdge.left //从左边缘开始滑动         self.view.addGestureRecognizer(swipe)     }           func swipe(_ recognizer:UIScreenEdgePanGestureRecognizer){         print("left edgeswipe ok")         let point=recognizer.location(in: self.view)         //这个点是滑动的起点         print(point.x)         print(point.y)     } }

3，UITapGestureRecognizer：轻点手势（点击）

（1）可以通过 numberOfTouchesRequired 属性设置触摸点数，比如设置 2 表示必须两个手指触摸时才会触发
（2）通过 numberOfTapsRequired 属性设置点击次数，单击设置为 1，双击设置为 2
（3）如果一个控件既监听了单击事件也监听了双击事件，默认当双击事件触发的时候也同时会触发单击事件。如果想双击时不触发单击，需要通过 require(toFail:) 进行设置

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   //单击监听         let tapSingle=UITapGestureRecognizer(target:self,action:#selector(tapSingleDid))         tapSingle.numberOfTapsRequired = 1         tapSingle.numberOfTouchesRequired = 1         //双击监听         let tapDouble=UITapGestureRecognizer(target:self,action:#selector(tapDoubleDid(_:)))         tapDouble.numberOfTapsRequired = 2         tapDouble.numberOfTouchesRequired = 1         //声明点击事件需要双击事件检测失败后才会执行         tapSingle.require(toFail: tapDouble)         self.view.addGestureRecognizer(tapSingle)         self.view.addGestureRecognizer(tapDouble)     }           func tapSingleDid(){         print("单击了")     }           func tapDoubleDid(_ sender:UITapGestureRecognizer){         if sender.view == self.view{             print("双击了")         }     } }

4，UIPinchGestureRecognizer：捏合手势（两个手指进行放大缩小）

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   //设置监听方法为pinchDid方法         let pinch = UIPinchGestureRecognizer(target:self,action:#selector(pinchDid(_:)))         self.view.addGestureRecognizer(pinch)     }           func pinchDid(_ recognizer:UIPinchGestureRecognizer) {         //在监听方法中可以实时获得捏合的比例         print(recognizer.scale);     } }

5，UIRotationGestureRecognizer：旋转手势（两个手指进行旋转）

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   let rotation = UIRotationGestureRecognizer(target:self,                                                    action:#selector(rotationDid(_:)))         self.view.addGestureRecognizer(rotation)     }           func rotationDid(_ recognizer:UIRotationGestureRecognizer){         //旋转的弧度转换为角度         print(recognizer.rotation*(180/CGFloat(M_PI)))     } }

6，UIPanGestureRecognizer：拖动手势

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import UIKit   class ViewController: UIViewController {           var rect:UIView!           override func viewDidLoad() {         super.viewDidLoad()                   rect = UIView(frame:CGRect(x:0, y:0, width:100, height:100))         rect.center = self.view.center         rect.backgroundColor = UIColor.orange         self.view.addSubview(rect)                   let pan = UIPanGestureRecognizer(target:self,action:#selector(panDid(_:)))         pan.maximumNumberOfTouches = 1         rect.addGestureRecognizer(pan)     }           func panDid(_ recognizer:UISwipeGestureRecognizer){         let point=recognizer.location(in: self.view)         //设置矩形的位置         rect.center=point     } }

通过 recognizer.view 我们可以直接得到触发事件的 view 对象，下面样例创建两个方块，但它们使用同一个拖动响应方法。

（注意：由于一个 GestureRecognizer 只能对应一个 view，所以每个 view 还是要分别使用各自的 GestureRecognizer）

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   //定义两个方块         let rect1 = UIView(frame:CGRect(x:0, y:0, width:100, height:100))         rect1.center = self.view.center         rect1.backgroundColor = UIColor.orange         self.view.addSubview(rect1)                   let rect2 = UIView(frame:CGRect(x:0, y:0, width:100, height:100))         //rect2.center = self.view.center         rect2.backgroundColor = UIColor.yellow         self.view.addSubview(rect2)                   //由于一个GestureRecognizer只能对应一个view，这里定义两个GestureRecognizer         let pan1 = UIPanGestureRecognizer(target:self,action:#selector(panDid(_:)))         pan1.maximumNumberOfTouches = 1         rect1.addGestureRecognizer(pan1)                   let pan2 = UIPanGestureRecognizer(target:self,action:#selector(panDid(_:)))         pan2.maximumNumberOfTouches = 1         rect2.addGestureRecognizer(pan2)               }           //两个方块都使用同一拖拽响应方法     func panDid(_ recognizer:UIPanGestureRecognizer){         let point=recognizer.location(in: self.view)         //设置矩形的位置         recognizer.view?.center = point     } }

7，UILongPressGestureRecognizer：长按

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import UIKit   class ViewController: UIViewController {           override func viewDidLoad() {         super.viewDidLoad()                   //长按监听         let longPress = UILongPressGestureRecognizer(target:self,                                                    action:#selector(longPressDid(_:)))         self.view.addGestureRecognizer(longPress)     }           func longPressDid(_ sender: UILongPressGestureRecognizer){         if sender.state == .began {             print("长按响应开始")         } else {             print("长按响应结束")         }     } }

原文出自：www.hangge.com  转载请保留原文链接：http://www.hangge.com/blog/cache/detail_546.html