UIGestureRecognizer

目录：
1、扫动手势UISwipeGestureRecognizer
2、轻拍手势UITapGestureRecognizer（点击）
3、捏合手势UIPinchGestureRecognizer
4、旋转手势UIRotationGestureRecognizer
5、长按手势UILongPressGestureRecognizer
6、拖动手势UIPanGestureRecognizer
7、捏合和旋转手势结合

1、扫动手势UISwipeGestureRecognizer

- (void)viewDidLoad
{
    [super viewDidLoad];
    //创建扫动手势
    UISwipeGestureRecognizer *swipe1 = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGestureRecognizer:)];
    //给swipe1指定扫动方向
    swipe1.direction = UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft;
    //将手势添加到view上
    [self.view addGestureRecognizer:swipe1];
    
    UISwipeGestureRecognizer *swipe2 = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGestureRecognizer:)];
    UISwipeGestureRecognizer *swipe3 = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGestureRecognizer:)];
    swipe2.direction = UISwipeGestureRecognizerDirectionDown;
    swipe3.direction = UISwipeGestureRecognizerDirectionUp;
    [self.view addGestureRecognizer:swipe2];
    [self.view addGestureRecognizer:swipe3];
}

//扫动手势触发方法
- (void)swipeGestureRecognizer:(UISwipeGestureRecognizer *)sender
{
    if (sender.direction == (UISwipeGestureRecognizerDirectionLeft|UISwipeGestureRecognizerDirectionRight)) {
        self.label.text = @"发生了横扫";
        [self performSelector:@selector(xiaoshi) withObject:self afterDelay:1];
    }else if(sender.direction == UISwipeGestureRecognizerDirectionDown){
        self.label.text = @"向下扫动";
        [self performSelector:@selector(xiaoshi) withObject:self afterDelay:1];
    }else if (sender.direction == UISwipeGestureRecognizerDirectionUp){
        self.label.text = @"向上扫动";
        [self performSelector:@selector(xiaoshi) withObject:self afterDelay:1];
    }
}

//触发方法
- (void)xiaoshi
{
    self.label.text = @"";
}

2、轻拍手势UITapGestureRecognizer（点击）

- (void)viewDidLoad
{
    [super viewDidLoad];
    //创建单击手势
    UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap1GestureRecognizer:)];
    //指定相关属性
    tap1.numberOfTapsRequired = 1;
    tap1.numberOfTouchesRequired = 1;
    [self.view addGestureRecognizer:tap1];
    
    UITapGestureRecognizer *tap2 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap1GestureRecognizer:)];
    tap2.numberOfTapsRequired = 2;
    tap2.numberOfTouchesRequired = 1;
    [self.view addGestureRecognizer:tap2];
    
    UITapGestureRecognizer *tap3 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap1GestureRecognizer:)];
    tap3.numberOfTapsRequired = 3;
    tap3.numberOfTouchesRequired = 1;
    [self.view addGestureRecognizer:tap3];
    
    //单击在双击完成后调用
    [tap1 requireGestureRecognizerToFail:tap2];
    [tap2 requireGestureRecognizerToFail:tap3];
}

- (void)tap1GestureRecognizer:(UITapGestureRecognizer *)sender
{
    if (sender.numberOfTapsRequired == 1) {
        self.label.text = @"单击手势";
        [self performSelector:@selector(xiaoshi) withObject:nil afterDelay:1];
    }else if (sender.numberOfTapsRequired == 2){
        self.label.text = @"双击手势";
        [self performSelector:@selector(xiaoshi) withObject:nil afterDelay:1];
    }else if (sender.numberOfTapsRequired == 3){
        self.label.text = @"三击手势";
        [self performSelector:@selector(xiaoshi) withObject:nil afterDelay:1];
    }
}

- (void)tap2GestureRecognizer:(UITapGestureRecognizer *)sender
{
    self.label.text = @"双击手势";
    [self performSelector:@selector(xiaoshi) withObject:nil afterDelay:1];
}

- (void)xiaoshi
{
    self.label.text = @"";
}

3、捏合手势UIPinchGestureRecognizer

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    //创建捏合手势
    UIPinchGestureRecognizer * pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchGestureRecognizer:)];
    
    //将手势添加到imageView上
    [self.iamge addGestureRecognizer:pinch];
    
    //必须指定允许交互
    self.iamge.userInteractionEnabled = YES;
}

- (void)pinchGestureRecognizer:(UIPinchGestureRecognizer *)sender
{
    //获取图片的中心点
    CGPoint location = [sender locationInView:self.view];
    self.iamge.center = CGPointMake(location.x, location.y);
    
    //通过手势收缩比例来改变imageview
    sender.view.transform = CGAffineTransformScale(sender.view.transform, sender.scale, sender.scale);
    sender.scale = 1;
}

4、旋转手势UIRotationGestureRecognizer

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    //创建旋转手势
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationGestureRecognizer:)];
    self.image.userInteractionEnabled = YES;
    [self.image addGestureRecognizer:rotation];
}

-(void)rotationGestureRecognizer:(UIRotationGestureRecognizer *)sender
{
    sender.view.transform = CGAffineTransformRotate(sender.view.transform, sender.rotation);
    sender.rotation = 0;
}

5、长按手势UILongPressGestureRecognizer

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    //创建长按手势
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressGestureRecognizer:)];
    
    //设置按住时间
    longPress.minimumPressDuration = 1.5;
    [self.view addGestureRecognizer:longPress];
}

-(void)longPressGestureRecognizer:(UILongPressGestureRecognizer *)sender
{
//    NSLog(@"发生长按");
    if (sender.state == UIGestureRecognizerStateBegan) {
        NSLog(@"开始录音");
    }else if (sender.state == UIGestureRecognizerStateEnded){
        NSLog(@"发送录音");
    }
}

6、拖动手势UIPanGestureRecognizer

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 创建拖动手势
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGestureRecognizer:)];
    self.imageview.userInteractionEnabled = YES;
    [self.imageview addGestureRecognizer:pan];
}

- (void)panGestureRecognizer:(UIPanGestureRecognizer *)sender
{
    CGPoint translation = [sender translationInView:self.view];
    CGPoint view = sender.view.center;
    sender.view.center = CGPointMake(view.x +translation.x, view.y + translation.y);
    [sender setTranslation:CGPointZero inView:self.view];
}

7、捏合和旋转手势结合

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 创建捏合手势
    self.pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchGestureRecognizer:)];
    self.imageview.userInteractionEnabled = YES;
    [self.imageview addGestureRecognizer:self.pinch];
    
    //创建旋转手势
    self.rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationGestureRecognizer:)];
    [self.imageview addGestureRecognizer:self.rotation];
    
    self.pinch.delegate = self;
    self.rotation.delegate = self;
}
#pragma mark 手势委托方法
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

- (void)rotationGestureRecognizer:(UIRotationGestureRecognizer *)sender
{
    sender.view.transform = CGAffineTransformRotate(sender.view.transform, sender.rotation);
    sender.rotation = 0;
}

- (void)pinchGestureRecognizer:(UIPinchGestureRecognizer *)sender
{
    //获取图片的中心点
    CGPoint location = [sender locationInView:self.view];
    self.imageview.center = CGPointMake(location.x, location.y);
    
    //通过手势收缩比例来改变imageview
    sender.view.transform = CGAffineTransformScale(sender.view.transform, sender.scale, sender.scale);
    sender.scale = 1;
}