UI手势识别器

   //七中手势:轻拍(tap) 长按(longPress) 旋转(rotation) 捏合(pinch) 拖拽(pan)

            // 轻扫(swipe) 屏幕边缘拖拽(screEdgePan)

   //添加图片

   UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 200, 200)];

   imgView.center = self.view.center;

   imgView.image = [UIImage imageNamed:@""];

   [self.view addSubview:imgView];

   [imgView release];

   //打开用户交互

   imgView.userInteractionEnabled = YES;

//一 轻拍(tap)

   //获取到轻拍手势时,让self调用tapAction:方法

   UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];

   //添加手势

   [imgView addGestureRecognizer:tap];

   //内存管理

   [tap release];

   //点击次数

   tap.numberOfTapsRequired = 2;

   //手指个数

   tap.numberOfTouchesRequired = 1;

//二 长按(longPress)

   UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction::)];

   [imgView addGestureRecognizer:longPress];

   [longPress release];

   //长按时间

   longPress.minimumPressDuration = 0.2;

//三 旋转(rotation)

   UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationAction:)];

   [imgView addGestureRecognizer:rotation];

   [rotation release];

//四 捏合(pinch)

   UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchAciton:)];

   [imgView addGestureRecognizer:pinch];

   [pinch release];

//五 轻扫(swipe)

   UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction:)];

   //默认只识别向右

   //设置方向时 最多只能设置 水平(左/右)或者垂直(上/下)

   swipe.direction = UISwipeGestureRecognizerDirectionLeft |UISwipeGestureRecognizerDirectionRight |UISwipeGestureRecognizerDirectionDown |UISwipeGestureRecognizerDirectionUp;

   [imgView addGestureRecognizer:swipe];

   [swipe release];

//六 pan(拖拽)

   UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];

   [imgView addGestureRecognizer:pan];

   [pan release];

//七 屏幕边缘拖拽(sreenEdgePan)

   UIScreenEdgePanGestureRecognizer *sep = [[UIScreenEdgePanGestureRecognizer alloc]initWithTarget:self action:@selector(sepAction:)];

   //需要设置拖拽的边缘

   sep.edges = UIRectEdgeLeft;

   //一般这个手势添加在VC的view上

   [self.view addGestureRecognizer:sep];

   [sep release];