自动识别手势

UIGestureRecognizer的一些子类

UISwipeGestureRecognizer

//滑动手势识别器

    UISwipeGestureRecognizer *ver = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(reportVer)];
    ver.direction = UISwipeGestureRecognizerDirectionDown | UISwipeGestureRecognizerDirectionUp;
    ver.numberOfTouchesRequired = 1;
    [self.view addGestureRecognizer:ver];

UITapGestureRecognizer

//轻击手势识别器

@interface BIDViewController : UIViewController <UIGestureRecognizerDelegate>

@end

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doTap)];
    tap.numberOfTapsRequired = 1;
    tap.numberOfTouchesRequired = 1;
    [self.view addGestureRecognizer:tap];
    [tap requireGestureRecognizerToFail:otherTap];//tap仅在otherTap未识别时触发

UIPinchGestureRecognizer

//捏合手势识别器

@interface BIDViewController : UIViewController <UIGestureRecognizerDelegate>

@end

    UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(doPinch:)];
    pinchGesture.delegate = self;
    [self.view addGestureRecognizer:pinchGesture];

- (void)doPinch:(UIPinchGestureRecognizer *)gesture
{
    scale = gesture.scale;
    [self transfromImageView];
    if (gesture.state ==  UIGestureRecognizerStateEnded) {
        previousScale = scale * previousScale;
        scale = 1;
    }
}

UIRotationGestureRecognizer

//旋转手势识别器

    UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(doRotate:)];
    rotationGesture.delegate = self;
    [self.view addGestureRecognizer:rotationGesture];

- (void)doRotate:(UIRotationGestureRecognizer *)gesture
{
    rotation = gesture.rotation;
    [self transfromImageView];
    if (gesture.state == UIGestureRecognizerStateEnded) {
        previousRotation = rotation + previousRotation;
        rotation = 0;
    }
}