手势操作

1.创建手势识别的实例

2.设置手势识别器的属性

3.将手势识别添加附加到指定的视图上

4.编写监听的方法

手势的状态:

recognizer.state

{

// 常用的四个:

UIGestureRecognizerStateBegan  // 开始

UIGestureRecognizerStateChanged// 改变

UIGestureRecognizerStateEnded // 结束

 UIGestureRecognizerStateCancelled// 取消

}

获取这个状态时坐标:

 CGPoint loc=[recognizer locationInView:self];

点按:

#pragma  mark - 点按
- (IBAction)tapBtnClick {
    
    // 创建手势的实例
    
    UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];
      // 设置属性:
    // 敲几下
    tap.numberOfTapsRequired=2;
    tap.numberOfTouchesRequired=2; // 几个手指敲
    // 添加到这个view中
    
    [self.myView addGestureRecognizer:tap];

}
  // 实现方法
- (void)tapAction:(UIGestureRecognizer *)recognizer{
    
    NSLog(@"我被点按了");
}

长按:
#pragma  mark - 长按

- (IBAction)longPressBtnClick:(id)sender {
    
    UILongPressGestureRecognizer *longPress=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];
    
    [self.myView addGestureRecognizer:longPress];
    
}
- (void)longPressAction:(UIGestureRecognizer *)recognizer{
    
    // 要设置他只执行一次,因为在这个时候是会有小bug的
    
    if (recognizer.state!=UIGestureRecognizerStateBegan) {
        return;
    }
    
    NSLog(@"被长按了");
}

缩放:
- (IBAction)scaleBtnClick:(id)sender {
    
    UIPinchGestureRecognizer *pinch=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchAction:)];
    
    pinch.delegate=self;
    
    [self.myView addGestureRecognizer:pinch];
}

- (void)pinchAction:(UIPinchGestureRecognizer *)recognizer{
    
    // 咱们是去去缩放这个view 就是去改变这个的transform的属性
    CGFloat scale= recognizer.scale;
    
    self.myView.transform=CGAffineTransformScale(self.myView.transform, scale, scale);
    
    recognizer.scale=1;

}

拖拽:
#pragma  mark - 拖拽

- (IBAction)panBtnClick:(id)sender {
    
    UIPanGestureRecognizer *pan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];
    
    [self.myView addGestureRecognizer:pan];
}

- (void )panAction:(UIPanGestureRecognizer *)recognizer{
    
    // 拖拽也是去改变它的transform
    
    // 1.获取移动的距离
    
    CGPoint distance=[recognizer translationInView:self.view];
    
    //2.移动图片框
    
    self.myView.transform=CGAffineTransformTranslate(self.myView.transform, distance.x, distance.y);
    
    //3.清除移动距离
    
    [recognizer setTranslation:CGPointZero inView:self.view];
}

旋转
#pragma  mark - 旋转

- (IBAction)rotaionBtnClick:(id)sender {
    
    UIRotationGestureRecognizer *rotation=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotaionAction:)];
    
    rotation.delegate=self;
    
    [self.myView addGestureRecognizer:rotation];
}

- (void)rotaionAction:(UIRotationGestureRecognizer *)recognizer{
    
    CGFloat angle=recognizer.rotation;
    
    self.myView.transform=CGAffineTransformRotate(self.myView.transform, angle);
    
    recognizer.rotation=0;
}

轻扫:
#pragma  mark - 轻扫

- (IBAction)swipBtnclick:(id)sender {
    
    UISwipeGestureRecognizer *swip1=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipAction:)];
    
   // swip1.description=UISwipeGestureRecognizerDirectionRight;
    [self.myView addGestureRecognizer:swip1];
    
    
    
    UISwipeGestureRecognizer *swip2=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipAction:)];
    
     swip2.direction=UISwipeGestureRecognizerDirectionLeft;
    [self.myView addGestureRecognizer:swip2];

    
    
}


- (void)swipAction:(UISwipeGestureRecognizer *)recognizer{
    
    //
    NSLog(@"轻扫");
    
    // 根据方向进行判断
    
    if (recognizer.direction==UISwipeGestureRecognizerDirectionLeft) {
        // 向左
        self.myView.transform=CGAffineTransformTranslate(self.myView.transform, -200, 0);
        
        
        // 再通过动画返回
        
        [UIView animateWithDuration:0.5 animations:^{
            
            self.myView.transform=CGAffineTransformIdentity ;
            
        }];
        
    }else{
        
        // 向右
        
        self.myView.transform=CGAffineTransformTranslate(self.myView.transform, 200, 0);
        
        
        // 再通过动画返回
        
        [UIView animateWithDuration:0.5 animations:^{
            
            self.myView.transform=CGAffineTransformIdentity ;
            
        }];

    }
    
}

多手势操作:
#pragma mark - 多手势识别 三步

/*
 // 创建代理
 
// 遵循协议
 
 //实现方法
 */

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    
    return YES;
    
}