事件手势，手势

1.开始触摸事件：

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

    NSLog(@"开始触摸%@", event);

}

2.正在触摸事件：

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

    NSLog(@"正在触摸%@", event);

}

3.取消触摸事件：

- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { 

    NSLog(@"取消触摸%@", event);

}

4.摇一摇开始事件：

-(void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {    

    NSLog(@"摇一摇开始");

}

5.摇一摇结束事件：

-(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {

    NSLog(@"摇一摇结束"); }

    二、手势

为了验证手势的作用，设置一张图片，在图片上做各种手势，看看图片的效果；

1.创建一个图片视图。并添加到根视图上。

UIImageView *imageview = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200, 300)];

    imageview.center = self.view.center;

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

    imageview.userInteractionEnabled = YES;

    imageview.contentMode = UIViewContentModeScaleAspectFit;

    [self.view addSubview:imageview];

    

2.点击、轻拍（tap）

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

////    执行方法需要点击（轻拍）的次数

//    tap.numberOfTapsRequired = 2;

////    需要几个手指点击（轻拍）

//    tap.numberOfTouchesRequired = 1;

////    将手势赋给视图

//    [imageview addGestureRecognizer:tap];

#pragma mark - 轻拍事件

- (void)tapAction:(UITapGestureRecognizer *)tap {

    NSLog(@"轻拍、点击手势");

//    NSLog(@"%@", tap.view);

    UIImageView *imageView = (UIImageView *)tap.view;

    [imageView setImage:[UIImage imageNamed:@"2.jpg"]];

}

3.长按（longPress）

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

////    判定为长按手势需要的时间 默认为0.5秒

//    longPress.minimumPressDuration = 2;

////  在判定过程中，允许用户手指移动的距离

//    longPress.allowableMovement = 200; 

//    [imageview addGestureRecognizer:longPress];

#pragma mark - 长按事件

- (void)longPressAction:(UILongPressGestureRecognizer *)longPress {

    UIImageView *imageView = (UIImageView *)longPress.view;

    [imageView setImage:[UIImage imageNamed:@"1.jpg"]];

}

4.捏合（pinch）

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

    [imageview addGestureRecognizer:pinCh];

#pragma mark - 捏合事件

- (void)pinchAction:(UIPinchGestureRecognizer * )pinch {

    UIImageView *imageView = (UIImageView *)pinch.view;

    imageView.transform = CGAffineTransformScale(imageView.transform, pinch.scale, pinch.scale);

    pinch.scale = 1;

}

  5.拖拽／平移 （pan）

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

    [imageview addGestureRecognizer:pan];

#pragma mark - 拖拽／平移事件

- (void)panACtion:(UIPanGestureRecognizer *)pan {

    UIImageView *imageView = (UIImageView *)pan.view;

    CGPoint p = [pan translationInView:imageView];

//    NSLog(@"%f%f", p.x, p.y);

    imageView.transform = CGAffineTransformTranslate(imageView.transform, p.x, p.y);

    [pan setTranslation:CGPointZero inView:imageView];

}

 6.旋转 （rotation）

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

    [imageview addGestureRecognizer: rotation];

#pragma mark - 旋转事件

- (void)rotationACtion:(UIRotationGestureRecognizer *)rotation {

 UIImageView *imageView = (UIImageView *)rotation.view;

    imageView.transform = CGAffineTransformRotate(imageView.transform, rotation.rotation);

    rotation.rotation = 0;

}

7.轻扫手势（swipe）

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

    [imageview addGestureRecognizer:swipe];

#pragma mark - 轻扫手势事件

- (void)swipeACtion:(UISwipeGestureRecognizer *)swipe { 

    UIImageView *imageView = (UIImageView *)swipe.view;

}

 8.屏幕边缘轻扫识别器（screenEdgePan）

    UIScreenEdgePanGestureRecognizer *screenEdgePan = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(screenEdgePanACtion:)];

#pragma mark - 屏幕边缘轻扫手势

- (void)screenEdgePanACtion:(UIScreenEdgePanGestureRecognizer *)screenEdgePan {

    UIImageView *imageView = (UIImageView *)screenEdgePan.view;

}