iOS常用手势

iOS里面提供了7个手势
轻拍，平移，轻扫，缩放，旋转，长按，屏幕边界

- (void)viewDidLoad {
    [super viewDidLoad];
    //UIImageView 默认关闭用户响应
    self.rv.imageView.userInteractionEnabled = YES;

#pragma mark -- 轻拍手势

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

#pragma mark --长按手势

    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longAction:)];
    longPress.minimumPressDuration = 1;
    [self.rv.imageView addGestureRecognizer:longPress];

#pragma mark ---- 旋转手势

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

#pragma mark -----捏合（缩放）

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


#pragma mark ------平移

    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
    [self.rv.imageView addGestureRecognizer:pan];
}

//轻拍手势的响应事件
- (void)tapAction:(UITapGestureRecognizer *)sender{
    self.rv.imageView.image = [UIImage imageNamed:@"2"];
}

//长按
- (void)longAction:(UILongPressGestureRecognizer *)sender{
    if (sender.state == UIGestureRecognizerStateBegan) {
        NSLog(@"别摸我");
    }
    if (sender.state == UIGestureRecognizerStateEnded) {
        NSLog(@"让你别摸你就别摸啊，这么听话啊");
    }
}

//旋转的响应事件
- (void)rotationAction:(UIRotationGestureRecognizer *)sender{
    self.rv.imageView.transform = CGAffineTransformRotate(self.rv.imageView.transform, sender.rotation);
    //重置旋转角度
    sender.rotation = 0;
 }
//捏合缩放响应事件
- (void)pinchAction:(UIPinchGestureRecognizer *)sender{
    sender.view.transform = CGAffineTransformScale(sender.view.transform, sender.scale, sender.scale);
    sender.scale = 1;
}

//平移
- (void)panAction:(UIPanGestureRecognizer *)sender{
    CGPoint point = [sender translationInView:sender.view];
    sender.view.transform = CGAffineTransformTranslate(sender.view.transform, point.x, point.y);
    //将偏移量归零
    [sender setTranslation:CGPointZero inView:sender.view];
}