IOS 開發之swift中手勢的實例詳解
手勢操作主要包括如下幾類
| 手勢 | 屬性 | 說明 |
|---|---|---|
| 點擊 UITapGestureRecognizer | numberOfTapsRequired：點擊的次數；numberOfTouchesRequired：點擊時有手指數量 | 設置屬性 numberOfTapsRequired 可以實現單擊，或雙擊的效果 |
| 滑動 UISwipeGestureRecognizer | direction：滑動方向 | direction 滑動方向分為上Up、下Down、左Left、右Right |
| 拖動 UIPanGestureRecognizer | 在拖動過程中，通過方法 translationInView 獲取拖動時的位移 | |
| 長按 UILongPressGestureRecognizer | minimumPressDuration：長按最少時間 | |
| 旋轉 UIRotationGestureRecognizer | ||
| 縮放 UIPinchGestureRecognizer |
注意：手勢效果在實施過程中，存在幾種狀態：
* Began
* Ended
* Cancelled
* Failed
* Possible
手勢效果圖
代碼示例
// 點擊let label = UILabel(frame: CGRectMake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))self.view.addSubview(label)label.backgroundColor = UIColor.lightGrayColor()label.text = "手勢操作-單指單擊手勢";label.adjustsFontSizeToFitWidth = truelabel.textAlignment = .Center;// 添加手勢let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("tapClick:"))tapRecognizer.numberOfTapsRequired = 1tapRecognizer.numberOfTouchesRequired = 1label.userInteractionEnabled = truelabel.addGestureRecognizer(tapRecognizer)// 手勢響應方法func tapClick(recognizer:UITapGestureRecognizer){ let label:UILabel = recognizer.view as! UILabel label.textColor = UIColor.redColor()}// 滑動let label = UILabel(frame: CGRectMake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))self.view.addSubview(label)label.backgroundColor = UIColor.lightGrayColor()label.text = "手勢操作-左滑手勢";label.adjustsFontSizeToFitWidth = truelabel.textAlignment = .Center;// 添加手勢let swipeLeftRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipeLeftClick:"))swipeLeftRecognizer.direction = .LeftswipeLeftRecognizer.numberOfTouchesRequired = 1label.userInteractionEnabled = truelabel.addGestureRecognizer(swipeLeftRecognizer)// 手勢響應方法func swipeLeftClick(recognizer:UISwipeGestureRecognizer){ let label = recognizer.view label!.backgroundColor = UIColor.orangeColor()}
// 拖動let label = UILabel(frame: CGRectMake(10.0, 10.0, 100.0, 100.0))self.view.addSubview(label)label.backgroundColor = UIColor.lightGrayColor()label.text = "手勢操作-拖動手勢";label.adjustsFontSizeToFitWidth = truelabel.textAlignment = .Center;// 添加手勢let panRecognizer = UIPanGestureRecognizer(target: self, action: Selector("panClick:"))label.userInteractionEnabled = truelabel.addGestureRecognizer(panRecognizer)var pointValue:CGPoint! = CGPointZero // 移動// 手勢響應方法func panClick(recognizer:UIPanGestureRecognizer){ let label:UILabel = recognizer.view as! UILabel let point = recognizer.translationInView(label) print("pan point = /(point)") // 移動 label.transform = CGAffineTransformMakeTranslation(point.x + self.pointValue.x, point.y + self.pointValue.y) if recognizer.state == .Began { label.backgroundColor = UIColor.yellowColor() self.view.bringSubviewToFront(label) } else if recognizer.state == .Ended { label.backgroundColor = UIColor.lightGrayColor() self.pointValue.x += point.x self.pointValue.y += point.y }}// 縮放let label = UILabel(frame: CGRectMake(10.0, 10.0, 200.0, 200.0))self.view.addSubview(label)label.backgroundColor = UIColor.lightGrayColor()label.text = "手勢操作-捏合手勢";label.adjustsFontSizeToFitWidth = truelabel.textAlignment = .Center;// 添加手勢let pinchRecognizer = UIPinchGestureRecognizer(target: self, action: Selector("pinchClick:"))label.userInteractionEnabled = truelabel.addGestureRecognizer(pinchRecognizer)// 手勢響應方法var scaleValue:CGFloat! = 1.0 // 縮放func pinchClick(recognizer:UIPinchGestureRecognizer){ let label:UILabel = recognizer.view as! UILabel let scale = recognizer.scale; if scale > 1.0 { // 放大 label.transform = CGAffineTransformMakeScale(self.scaleValue + scale - 1.0, self.scaleValue + scale - 1.0) } else { // 縮小 label.transform = CGAffineTransformMakeScale(self.scaleValue * scale, self.scaleValue * scale) } if recognizer.state == .Began { label.backgroundColor = UIColor.greenColor() self.view.bringSubviewToFront(label) } else if recognizer.state == .Ended { label.backgroundColor = UIColor.lightGrayColor() if scale > 1.0 { self.scaleValue = self.scaleValue + scale - 1.0; } else { self.scaleValue = self.scaleValue * scale } }}// 旋轉let label = UILabel(frame: CGRectMake(10.0, 10.0, 200.0, 200.0))self.view.addSubview(label)label.backgroundColor = UIColor.lightGrayColor()label.text = "手勢操作-旋轉手勢";label.adjustsFontSizeToFitWidth = truelabel.textAlignment = .Center;// 添加手勢let rotationRecognizer = UIRotationGestureRecognizer(target: self, action: Selector("ratotionClick:"))label.userInteractionEnabled = truelabel.addGestureRecognizer(rotationRecognizer)var rotationValue:CGFloat! = 1.0 // 旋轉// 手勢響應方法func ratotionClick(recognizer:UIRotationGestureRecognizer){ let label:UILabel = recognizer.view as! UILabel let rotation = recognizer.rotation label.transform = CGAffineTransformMakeRotation(rotation + self.rotationValue) if recognizer.state == .Began { label.backgroundColor = UIColor.greenColor() self.view.bringSubviewToFront(label) } else if recognizer.state == .Ended { label.backgroundColor = UIColor.lightGrayColor() self.rotationValue = self.rotationValue + rotation }}// 長按let label = UILabel(frame: CGRectMake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))self.view.addSubview(label)label.backgroundColor = UIColor.lightGrayColor()label.text = "手勢操作-長按手勢";label.adjustsFontSizeToFitWidth = truelabel.textAlignment = .Center;// 添加手勢let pressRecognizer = UILongPressGestureRecognizer(target: self, action: Selector("pressClick:")) pressRecognizer.minimumPressDuration = 3.0 label.userInteractionEnabled = true label.addGestureRecognizer(pressRecognizer)// 手勢響應方法func pressClick(recognizer:UILongPressGestureRecognizer){ let label:UILabel = recognizer.view as! UILabel if recognizer.state == .Began { let alertView = UIAlertView(title: nil, message: "長按響應", delegate: nil, cancelButtonTitle: "知道了") alertView.show() label.backgroundColor = UIColor.orangeColor() self.view.bringSubviewToFront(label) } else if recognizer.state == .Ended { label.backgroundColor = UIColor.lightGrayColor() }}如有疑問請留言或者到本站社區交流討論，感謝閱讀希望能幫助到大家，謝謝大家對本站的支持！
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