手势识别器

self.view.backgroundColor = [UIColor whiteColor];

//UIGestureRecognizer  手势识别器

//手势: 有规律的触摸

//    UIGestureRecognizer 抽象类

//七种手势: 轻拍(tap) 长按(longPress) 旋转(rotation) 捏合(pinch) 拖拽(pan) 清扫(swipe) 屏幕边缘拖拽(screenEdgepan)

//图片

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

imageView.center = self.view.center;

//imageView.image = [UIImage imageNamed:@"1.jpg"];

NSString *path = [[NSBundle mainBundle] pathForResource:@"1" ofType:@"jpg"];

imageView.image = [UIImage imageWithContentsOfFile:path];

[self.view addSubview:imageView];

[imageView release];

//打开用户交互

imageView.userInteractionEnabled = YES;

#if 0

/*轻拍*/

// 创建对象

//获取到轻拍手势 让self调用tapAction:方法

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

//添加手势

[imageView addGestureRecognizer:tap];

//内存管理

[tap release];

//点击次数(默认为1)

tap.numberOfTapsRequired = 2;

//手指个数

tap.numberOfTouchesRequired = 2;

#endif

#if 0

/*长按*/

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

[imageView addGestureRecognizer:lp];

[lp release];

//长按时间

lp.minimumPressDuration = 1;

#endif

#if 0

/*旋转 rotation*/

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

[imageView addGestureRecognizer:rotation];

[rotation release];

#endif

#if 0

/*捏合pinch*/

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

[imageView addGestureRecognizer:pinch];

[pinch release];

#endif

#if 0

/*清扫*/

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

//设置方向(只支持一个方向)

swipe.direction = UISwipeGestureRecognizerDirectionRight;//向右清扫

[imageView addGestureRecognizer:swipe];

[swipe release];

#endif

#if 0

/*拖拽*/

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

[imageView addGestureRecognizer:pan];

[pan release];

#endif

#if 1

/*边缘拖拽*/

UIScreenEdgePanGestureRecognizer *edgePan = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(edgePanAction:)];

//边缘平移只支持一个方向

edgePan.edges = UIRectEdgeLeft;

[imageView addGestureRecognizer:edgePan];

[edgePan release];

#endif