• 輕擊手勢(shì)（TapGestureRecognizer）
• 輕掃手勢(shì) （SwipeGestureRecognizer）
• 長(zhǎng)按手勢(shì)（LongPressGestureRecognizer）
• 拖動(dòng)手勢(shì)（PanGestureRecognizer）
• 捏合手勢(shì)（PinchGestureRecognizer）
• 旋轉(zhuǎn)手勢(shì)（RotationGestureRecognizer）

@interface ViewController () <UIGestureRecognizerDelegate>


@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    // 1.添加點(diǎn)擊手勢(shì)
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];
    // tap.numberOfTapsRequired = 2; // 要求雙擊才觸發(fā)事件
    // tap.numberOfTouchesRequired = 2; // 要求兩個(gè)手指同時(shí)觸摸才觸發(fā)事件
    
    tap.delegate = self;
    // 將點(diǎn)擊手勢(shì)添加到imageView上
    [_imageView addGestureRecognizer:tap];
    
    // 2.添加移動(dòng)手勢(shì)
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
    [_imageView addGestureRecognizer:pan];
    pan.delegate = self;
    
    // 3.添加縮放手勢(shì)
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
    [_imageView addGestureRecognizer:pinch];
    pinch.delegate = self;
    
    // 4.旋轉(zhuǎn)手勢(shì)
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
    [_imageView addGestureRecognizer:rotation];
    rotation.delegate = self;
    
    // 5.輕掃手勢(shì)
    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    // 設(shè)置輕掃的方向
    swipe.direction = UISwipeGestureRecognizerDirectionLeft;
    [_imageView addGestureRecognizer:swipe];
    swipe.delegate = self;
    
    // 添加長(zhǎng)按手勢(shì)
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
    //設(shè)置長(zhǎng)按時(shí)間
    longPress.minimumPressDuration = 0.5;
    [_imageView addGestureRecognizer:longPress];
    longPress.delegate = self;
    
}

- (void)tap:(UITapGestureRecognizer *)tap {
    NSLog(@"tap---");
}

- (void)pan:(UIPanGestureRecognizer *)pan {
    // 獲得移動(dòng)手勢(shì)在self.view上面的偏移量（x, y）
    CGPoint point = [pan translationInView:self.view];
    // 讓圖片視圖隨著手指移動(dòng)
    pan.view.center = CGPointMake(pan.view.center.x + point.x, pan.view.center.y + point.y);
    // 重置手勢(shì)獲取的偏移量
    [pan setTranslation:CGPointZero inView:self.view];
}

- (void)pinch:(UIPinchGestureRecognizer *)pinch {
    // 參數(shù)一：原來(lái)的transform
    // 參數(shù)二：水平方向縮放的倍數(shù)
    // 參數(shù)三：垂直方向縮放的倍數(shù)
    pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
    // 重置縮放倍數(shù)
    pinch.scale = 1.0;
}

- (void)rotation:(UIRotationGestureRecognizer *)rotation {
    rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);
    // 重置角度
    rotation.rotation = 0;
}

- (void)swipe:(UISwipeGestureRecognizer *)swipe {
    NSLog(@"swipe");
}

- (void)longPress:(UILongPressGestureRecognizer *)longPress {
    /*
     說(shuō)明：長(zhǎng)按手勢(shì)的常用狀態(tài)如下
     開始：UIGestureRecognizerStateBegan
     改變：UIGestureRecognizerStateChanged
     結(jié)束：UIGestureRecognizerStateEnded
     取消：UIGestureRecognizerStateCancelled
     失敿钒病：UIGestureRecognizerStateFailed
     */
    if (longPress.state == UIGestureRecognizerStateBegan) {
        NSLog(@"longPress");
    }
}


// 設(shè)置同時(shí)可以有兩個(gè)手勢(shì)同時(shí)識(shí)別
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}