iOS开发之手势识别
总共有六种手势识别：
轻击手势（TapGestureRecognizer）,
轻扫手势 （SwipeGestureRecognizer）,
长按手势（LongPressGestureRecognizer）,
拖动手势（PanGestureRecognizer）,
捏合手势（PinchGestureRecognizer）,
旋转手势（RotationGestureRecognizer）;
1，轻击手势（TapGestureRecognizer）
//新建tap手势UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)];//设置点击次数和点击手指数tapGesture.numberOfTapsRequired = 1;// 点击次数tapGesture.numberOfTouchesRequired = 1;// 点击手指数[self.view addGestureRecognizer:tapGesture]; // 添加
//轻击手势触发方法-(void)tapGesture:(id)sender {//轻击后要做的事情}
2，长按手势（LongPressGestureRecognizer）
//添加长摁手势UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)];//设置长按时间longPressGesture.minimumPressDuration = 0.5;//(2秒)[self.view addGestureRecognizer:longPressGesture];
//常摁手势触发方法-(void)longPressGesture:(id)sender{UILongPressGestureRecognizer *longPress = sender;if(longPress.state == UIGestureRecognizerStateBegan){UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示"message:@"长按触发"delegate:nil cancelButtonTitle:@"取 消"otherButtonTitles: nil];[alter show];}}
说明：手势的常用状态如下
开始：UIGestureRecognizerStateBegan
改变：UIGestureRecognizerStateChanged
结束：UIGestureRecognizerStateEnded
取消：UIGestureRecognizerStateCancelled
失败：UIGestureRecognizerStateFailed
3，轻扫手势（SwipeGestureRecognizer）
//添加轻扫手势UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];//设置轻扫的方向swipeGesture.direction = UISwipeGestureRecognizerDirectionRight;//默认向右[self.view addGestureRecognizer:swipeGesture];//添加轻扫手势UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];//设置轻扫的方向swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft;//默认向右[self.view addGestureRecognizer:swipeGestureLeft];
//轻扫手势触发方法-(void)swipeGesture:(id)sender{UISwipeGestureRecognizer *swipe = sender;if(swipe.direction == UISwipeGestureRecognizerDirectionLeft){//向左轻扫做的事情}if(swipe.direction == UISwipeGestureRecognizerDirectionRight){//向右轻扫做的事情}}
4，捏合手势（PinchGestureRecognizer）
//添加捏合手势UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)];[self.view addGestureRecognizer:pinchGesture];
////捏合手势触发方法-(void) pinchGesture:(id)sender{UIPinchGestureRecognizer *gesture = sender;//手势改变时if(gesture.state == UIGestureRecognizerStateChanged){//捏合手势中scale属性记录的缩放比例_imageView.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale);}//结束后恢复if(gesture.state==UIGestureRecognizerStateEnded){[UIView animateWithDuration:0.5 animations:^{_imageView.transform = CGAffineTransformIdentity;//取消一切形变}];}}
5，拖动手势（PanGestureRecognizer）
//添加拖动手势UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)];[self.view addGestureRecognizer:panGesture];
//拖动手势-(void) panGesture:(id)sender {UIPanGestureRecognizer *panGesture = sender;CGPoint movePoint = [panGesture translationInView:self.view];//做你想做的事儿}
6，旋转手势（RotationGestureRecognizer）
//添加旋转手势UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)];[self.view addGestureRecognizer:rotationGesture];
//旋转手势-(void)rotationGesture:(id)sender {UIRotationGestureRecognizer *gesture = sender;if(gesture.state==UIGestureRecognizerStateChanged){_imageView.transform=CGAffineTransformMakeRotation(gesture.rotation);}if(gesture.state==UIGestureRecognizerStateEnded){[UIView animateWithDuration:1 animations:^{_imageView.transform=CGAffineTransformIdentity;//取消形变}];}}iOS中常用的手势，可自行吸收~
