iOS 手势

点击

-(void)setTap
{
    UITapGestureRecognizer*tap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];
    [self.view addGestureRecognizer:tap];
}
-(void)tap:(UITapGestureRecognizer*)tap
{
    
}

捏合

-(void)setUpPinch
{
    UIPinchGestureRecognizer*pinch=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
    [self.view addGestureRecognizer:pinch];
}
-(void)pinch:(UIPinchGestureRecognizer*)pinch
{
    self.view.transform=CGAffineTransformScale(self.view.transform, pinch.scale, pinch.scale);
    // 复位  由于手势是相对原始位置计算的旋转角度 复位可以试试保存
    pinch.scale=1;
}

旋转

-(void)setUpRotation
{
    UIRotationGestureRecognizer*rotation=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];
    [self.view addGestureRecognizer:rotation];
}
-(void)rotation:(UIRotationGestureRecognizer*)rotation
{
    self.view.transform=CGAffineTransformRotate(self.view.transform, rotation.rotation);
    // 复位 默认传递的旋转的角度都是相对于最开始的位置
    rotation.rotation=1;
}

长按

//默认会触发两次
-(void)setUpLongPress
{
    UILongPressGestureRecognizer*longPress=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];
    [self.view addGestureRecognizer:longPress];
}
-(void)longPress:(UILongPressGestureRecognizer*)longPress
{
    if (longPress.state==UIGestureRecognizerStateBegan)
    {
        NSLog(@"UIGestureRecognizerStateBegan");
    }
    else if (longPress.state==UIGestureRecognizerStateEnded)
    {
        NSLog(@"UIGestureRecognizerStateEnded");
    }
}

轻扫

-(void)setUpSwipe
{
    //默认轻扫的方向是往右
    UISwipeGestureRecognizer*swipe=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe)];
    swipe.direction=UISwipeGestureRecognizerDirectionUp;
    swipe.delegate=self;//默认是不支持多个手势 
    [self.view addGestureRecognizer:swipe];
    //如果想要一个控件支持多个方向的轻扫，必须创建多个轻扫手势，一个手势只支持一个方向
    UISwipeGestureRecognizer*swipeDown=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe)];
    swipeDown.direction=UISwipeGestureRecognizerDirectionDown;
    swipeDown.delegate=self;//默认是不支持多个手势 
    [self.view addGestureRecognizer:swipeDown];
}
-(void)swipe
{
    NSLog(@"%s",__func__);
}

滑动

-(void)setUpPan
{
    UIPanGestureRecognizer*pan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];
    [self.view addGestureRecognizer:pan];
}
-(void)pan:(UIPanGestureRecognizer*)pan
{
    //获取手势的触摸点
    CGPoint locaP=[pan locationInView:self.view];
    //获取手势的移动，也是相对于最开始的位置
    CGPoint transP=[pan translationInView:self.view];
    self.view.transform=CGAffineTransformScale(self.view.transform, transP.x, transP.y);
    //复位
    [pan setTranslation:CGPointZero inView:self.view];
    NSLog(@"%@",NSStringFromCGPoint(transP));
}

代理

//是否允许开始触发手势
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    return YES;
}
//是否允许同时支持多个手势，默认是不支持多个手势
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}
//是否允许接收手指的触摸点
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    CGPoint curP=[touch locationInView:self.view];
    NSLog(@"%@",NSStringFromCGPoint(curP));
    return YES;
}