iOS - UIGestureRecognizer

前言

	NS_CLASS_AVAILABLE_IOS(3_2)  @interface UIGestureRecognizer : NSObject
	@available(iOS 3.2, *)		 public class UIGestureRecognizer : NSObject

	// 点击（轻点）
	NS_CLASS_AVAILABLE_IOS(3_2)  @interface UITapGestureRecognizer : UIGestureRecognizer
	@available(iOS 3.2, *)		 public class UITapGestureRecognizer : UIGestureRecognizer

	// 长按（按住不放）
	NS_CLASS_AVAILABLE_IOS(3_2)  @interface UILongPressGestureRecognizer : UIGestureRecognizer
	@available(iOS 3.2, *)		 public class UILongPressGestureRecognizer : UIGestureRecognizer

	// 旋转（两个手指进行旋转）
	NS_CLASS_AVAILABLE_IOS(3_2)  @interface UIRotationGestureRecognizer : UIGestureRecognizer
	@available(iOS 3.2, *)      public class UIRotationGestureRecognizer : UIGestureRecognizer

	// 捏合（两个手指，缩放手势）
	NS_CLASS_AVAILABLE_IOS(3_2)  @interface UIPinchGestureRecognizer : UIGestureRecognizer
	@available(iOS 3.2, *)      public class UIPinchGestureRecognizer : UIGestureRecognizer

	// 拖动（移动速度较慢）
	NS_CLASS_AVAILABLE_IOS(3_2)  @interface UIPanGestureRecognizer : UIGestureRecognizer
	@available(iOS 3.2, *)		 public class UIPanGestureRecognizer : UIGestureRecognizer

	// 滑动（快速移动）
	NS_CLASS_AVAILABLE_IOS(3_2)  @interface UISwipeGestureRecognizer : UIGestureRecognizer
	@available(iOS 3.2, *)		 public class UISwipeGestureRecognizer : UIGestureRecognizer

1、tapGesture 点击手势

1.1 tapGesture 的创建

• Objective-C

  	// 实例化点击手势对象
   	UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self
   	                                                                             action:@selector(tapClick:)];
  
  	// 向 imageView 添加点击手势
   	[imageView addGestureRecognizer:tapGesture];
  

• Swift

  	// 实例化点击手势对象
  	let tapGesture:UITapGestureRecognizer = UITapGestureRecognizer(target: self,
  	                                                               action: #selector(UiGestureRecognizer.tapClick(_:)))   
  
  	// 向 imageView 添加点击手势
  	imageView?.addGestureRecognizer(tapGesture)
  

1.2 tapGesture 的设置

• Objective-C

  	// 设置点击次数
  	/*
  		默认为 1：单击，为 2 时为双击
  	*/
  	singleTapGesture.numberOfTapsRequired = 1;
  
  	// 设置触摸点数
  	/*
  		默认为 1，单个手指触摸
  	*/
  	singleTapGesture.numberOfTouchesRequired = 1;
  
  	// 单双击共存
  	/*
  		设置单击手势与双击手势共存，当没有检测到双击手势或检测双击手势失败时单击手势才有效
  	*/
  	[singleTapGesture requireGestureRecognizerToFail:doubleTapGesture];
  
  	// 获取点击的视图
  	/*
  		剪取点击的视图，附带点击手势一起剪取
  	*/
  	UIView *tapView = tapGesture.view;
  
  	// 获取点击的图片
  	/*
  		复制点击的图片，附带点击手势一起复制
  	*/
  	UIImage *tapImage = ((UIImageView *)tapGesture.view).image;
  

• Swift

  	// 设置点击次数
  	/*
  		默认为 1：单击，为 2 时为双击
  	*/
  	singleTapGesture.numberOfTapsRequired = 1
  
  	// 设置触摸点数
  	/*
  		默认为 1，单个手指触摸
  	*/
  	singleTapGesture.numberOfTouchesRequired = 1
  
  	// 单双击共存
  	/*
  		设置单击手势与双击手势共存，当没有检测到双击手势或检测双击手势失败时单击手势才有效
  	*/
  	singleTapGesture.requireGestureRecognizerToFail(doubleTapGesture)
  
  	// 获取点击的视图
  	/*
  		剪取点击的视图，附带点击手势一起剪取
  	*/
  	let tapView:UIView = tapGesture.view!
  
  	// 获取点击的图片
  	/*
  		复制点击的图片，附带点击手势一起复制
  	*/
  	let tapImage:UIImage = (tapGesture.view! as! UIImageView).image!
  

1.3 自定义触摸响应事件处理

• Objective-C

  	- (void)tapClick:(UITapGestureRecognizer *)tapGesture {
  
  	}
  

• Swift

  	func tapClick(tapGesture:UITapGestureRecognizer) {
  
  	}
  

2、longPressGesture 长按手势

2.1 longPressGesture 的创建

• Objective-C

  	// 实例化长按手势对象
  	UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self
  	                                                                                               action:@selector(longPressClick:)];
  
  	// 向 imageView 添加长按手势
  	[imageView addGestureRecognizer:longPressGesture];
  

• Swift

  	// 实例化长按手势对象
  	let longPressGesture:UILongPressGestureRecognizer = UILongPressGestureRecognizer(target: self,
  	                                                                                 action: #selector(UiGestureRecognizer.longPressClick(_:)))
  
  	// 向 imageView 添加长按手势
  	imageView?.addGestureRecognizer(longPressGesture)
  

2.2 longPressGesture 的设置

• Objective-C

  	// 获取手势状态
  	UIGestureRecognizerState state = longPressGesture.state;
  
  	// 长按手势开始
  	if (longPressGesture.state == UIGestureRecognizerStateBegan) {
  
  	}
  
  	// 长按手势触发结束
  	if (longPressGesture.state == UIGestureRecognizerStateEnded) {
  
  	}
  

• Swift

  	// 获取手势状态
  	let state:UIGestureRecognizerState = longPressGesture.state
  
  	// 长按手势开始
  	if longPressGesture.state == UIGestureRecognizerState.Began {
  
  	}
  
  	// 长按手势触发结束
  	if longPressGesture.state == UIGestureRecognizerState.Ended {
  
  	}
  

2.3 自定义触摸响应事件处理

• Objective-C

  	- (void)longPressClick:(UILongPressGestureRecognizer *)longPressGesture {
  
  	}
  

• Swift

  	func longPressClick(longPressGesture:UILongPressGestureRecognizer) {
  
  	}
  

3、rotationGesture 旋转手势

3.1 rotationGesture 的创建

• Objective-C

  	// 实例化旋转手势对象
  	UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self
  	                                                                                            action:@selector(rotationClick:)];
  
  	// 向 imageView 添加旋转手势
  	[imageView addGestureRecognizer:rotationGesture];
  

• Swift

  	// 实例化旋转手势对象
  	let rotationGesture:UIRotationGestureRecognizer = UIRotationGestureRecognizer(target: self,
  	                                                                              action: #selector(UiGestureRecognizer.rotationClick(_:)))
  
  	// 向 imageView 添加旋转手势
  	imageView?.addGestureRecognizer(rotationGesture)
  

3.2 rotationGesture 的设置

• Objective-C

  	// 获取旋转角度
  	/*
  		rotation 获取到的为弧度，1 度 ＝ PI/180 弧度
  	*/
  	CGFloat rotation = rotationGesture.rotation  * 180 * M_1_PI;
  
  	// 图片旋转
  	/*
  		lastRotation 为之前的角度
  	*/
  	imageView.transform = CGAffineTransformMakeRotation(lastRotation + rotationGesture.rotation);
  
  	// 旋转手势触发结束
  	if (rotationGesture.state == UIGestureRecognizerStateEnded) {
  
  		lastRotation += rotationGesture.rotation;
  	}
  

• Swift

  	// 获取旋转角度
  	/*
  		rotation 获取到的为弧度，1 度 ＝ PI/180 弧度
  	*/
  	let rotation:CGFloat = rotationGesture.rotation  * 180 * CGFloat(M_1_PI)
  
  	// 图片旋转
  	/*
  		lastRotation 为之前的角度
  	*/
  	imageView?.transform = CGAffineTransformMakeRotation(lastRotation + rotationGesture.rotation)
  
  	// 旋转手势触发结束
  	if rotationGesture.state == UIGestureRecognizerState.Ended {
  
  		lastRotation += rotationGesture.rotation
  	}
  

3.3 自定义触摸响应事件处理

• Objective-C

  	// 用模拟器时需按住 option 键
  	- (void)rotationClick:(UIRotationGestureRecognizer *)rotationGesture {
  
  	}
  

• Swift

  	// 用模拟器时需按住 option 键
  	func rotationClick(rotationGesture:UIRotationGestureRecognizer) {
  
  	}
  

4、pinchGesture 捏合手势

4.1 pinchGesture 的创建

• Objective-C

  	// 实例化捏合手势对象
  	UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self
  	                                                                                   action:@selector(pinchClick:)];
  
  	// 向 imageView 添加捏合手势
  	[imageView addGestureRecognizer:pinchGesture];
  

• Swift

  	// 实例化捏合手势对象
  	let pinchGesture:UIPinchGestureRecognizer = UIPinchGestureRecognizer(target: self,
  	                                                                     action: #selector(UiGestureRecognizer.pinchClick(_:)))
  
  	// 向 imageView 添加捏合手势
  	imageView?.addGestureRecognizer(pinchGesture)
  

4.2 pinchGesture 的设置

• Objective-C

  	// 获取缩放倍数
  	CGFloat scale = pinchGesture.scale;
  
  	// 图片缩放
  	imageView.transform = CGAffineTransformMakeScale(pinchGesture.scale, pinchGesture.scale);
  	imageView.bounds = CGRectMake(0, 0, imageView.bounds.size.width * pinchGesture.scale,
  	                                    imageView.bounds.size.height * pinchGesture.scale);
  
  	// 还原缩放倍数
  	[pinchGesture setScale:1];
  

• Swift

  	// 获取缩放倍数
  	let scale:CGFloat = pinchGesture.scale
  
  	// 图片缩放
  	imageView?.transform = CGAffineTransformMakeScale(pinchGesture.scale, pinchGesture.scale)
  	imageView?.bounds = CGRectMake(0, 0, imageView!.bounds.size.width * pinchGesture.scale,
  	                                     imageView!.bounds.size.height * pinchGesture.scale)
  
  	// 还原缩放倍数
  	pinchGesture.scale = 1
  

4.3 自定义触摸响应事件处理

• Objective-C

  	// 用模拟器时需按住 option 键
  	- (void)pinchClick:(UIPinchGestureRecognizer *)pinchGesture {
  
  	}
  

• Swift

  	// 用模拟器时需按住 option 键
  	func pinchClick(pinchGesture:UIPinchGestureRecognizer) {
  
  	}
  

5、panGesture 拖动手势

5.1 panGesture 的创建

• Objective-C

  	// 实例化拖拽手势对象
  	UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self
  	                                                                             action:@selector(panClick:)];
  
  	// 向 imageView 添加拖拽手势
  	[imageView addGestureRecognizer:panGesture];
  

• Swift

  	// 实例化拖拽手势对象
  	let panGesture:UIPanGestureRecognizer = UIPanGestureRecognizer(target: self,
  	                                                               action: #selector(UiGestureRecognizer.panClick(_:)))
  
  	// 向 imageView 添加拖拽手势
  	imageView?.addGestureRecognizer(panGesture)
  

5.2 panGesture 的设置

• Objective-C

  	// 获取手势位置
  	CGPoint currentPoint = [panGesture locationInView:self.view];
  
  	// 图片移动
  	imageView.center = currentPoint;
  

• Swift

  	// 获取手势位置
  	let currentPoint:CGPoint = panGesture.locationInView(self.view)
  
  	// 图片移动
  	imageView?.center = currentPoint
  

5.3 自定义触摸响应事件处理

• Objective-C

  	- (void)panClick:(UIPanGestureRecognizer *)panGesture {
  
  	}
  

• Swift

  	func panClick(panGesture:UIPanGestureRecognizer) {
  
  	}
  

6、swipeGesture 滑动手势

6.1 swipeGesture 的创建

• Objective-C

  	// 实例化滑动手势对象
  	UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self
  	                                                                                   action:@selector(swipeClick:)];
  
  	// 设置滑动方向，默认为 0：向右滑动
  	swipeGesture.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight;
  
  	// 向 imageView 添加拖拽手势
  	[imageView addGestureRecognizer:swipeGesture];
  

• Swift

  	// 实例化滑动手势对象
  	let swipeGesture:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self,
  	                                                                     action: #selector(UiGestureRecognizer.swipeClick(_:)))
  
  	// 设置滑动方向，默认为 0：向右滑动
  	swipeGesture.direction = [.Left, .Right]
  
  	// 向 imageView 添加拖拽手势
  	imageView?.addGestureRecognizer(swipeGesture)
  

6.2 swipeGesture 的设置

• Objective-C

  	// 获取滑动方向
  	UISwipeGestureRecognizerDirection direction = swipeGesture.direction;
  

• Swift

  	// 获取滑动方向
  	let direction:UISwipeGestureRecognizerDirection = swipeGesture.direction
  

6.3 自定义触摸响应事件处理

• Objective-C

  	- (void)swipeClick:(UISwipeGestureRecognizer *)swipeGesture {
  
  	}
  

• Swift

  	func swipeClick(swipeGesture:UISwipeGestureRecognizer) {
  
  	}