各种手势的使用

今天项目遇到了各种手势，索性把所有手势全都收集了一遍，也不是全部吧，但是常用的都在这里了 ，手势效果除了建档的点击手势和长安手势之外，其他手势都需要注意会有累加效果，累加效果每次如果不给于重置，手势将会进行叠加，叠加的效果就是，根本停不下来！！！！！！！！

遵守UIGestureRecognizerDelegate 协议

//点击的手势
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTapGesture:)];
    //设定点击次序，识别手势的时候使用
    tapGesture.numberOfTapsRequired = 2;
    //[view addGestureRecognizer:tapGesture];
    
    //添加长按手势
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(handleLongPressGesture:)];
    //设置按压最短持续时间，默认0.5s
    longPress.minimumPressDuration = 1;
    [view addGestureRecognizer:longPress];
    
    //移动的手势，滑动的手势
    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePanGesture:)];
    [view addGestureRecognizer:panGesture];
    
    //捏合手势
    UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(handlePinchGesture:)];
    pinchGesture.delegate = self;
    [view addGestureRecognizer:pinchGesture];
    
    //旋转手势
    UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(handleRotationGesture:)];
    rotationGesture.delegate = self;
    [view addGestureRecognizer:rotationGesture];

#pragma mark -
#pragma mark Handle Gesture Recoginzer

- (void)handleRotationGesture:(UIRotationGestureRecognizer*)gesture{
    if (gesture.state == UIGestureRecognizerStateBegan || gesture.state == UIGestureRecognizerStateChanged) {
        UIView *view = gesture.view;
        [self.view bringSubviewToFront:view];
        //旋转的弧度
        CGFloat rotation = gesture.rotation;
        view.transform = CGAffineTransformRotate(view.transform, rotation);
        
        //注意有累加
        gesture.rotation = 0.0;
    }
}

- (void)handlePinchGesture:(UIPinchGestureRecognizer*)gesture
{
    if (gesture.state == UIGestureRecognizerStateBegan || gesture.state == UIGestureRecognizerStateChanged) {
        UIView *view = gesture.view;
        [self.view bringSubviewToFront:view];
        //得到缩放的比例，然后设置transform的缩放参数
        //gesture.scale 捏合时候的缩放比例
        CGFloat scale = gesture.scale;
        
        //设置view.transform scale 代表缩放
        //第一个参数，是基准值，在此基础上进行缩放
        //第二个参数，x 坐标方向的缩放比例
        //第三个参数，y 坐标方向的缩放比例
        view.transform = CGAffineTransformScale(view.transform, scale, scale);
        
        //由于手势效果会累积,所以需要给他复位
        gesture.scale = 1.0;
    }
}

- (void)handlePanGesture:(UIPanGestureRecognizer*)gesture
{
    if (gesture.state == UIGestureRecognizerStateBegan || gesture.state == UIGestureRecognizerStateChanged) {
        //手势识别成功，并且手势持续进行中
        UIView *view = gesture.view;
        [self.view bringSubviewToFront:view];
        //手势在self.view上移动的多少
        CGPoint offset = [gesture translationInView:self.view];
        CGPoint newCenter = CGPointMake(view.center.x+offset.x, view.center.y+offset.y);
        view.center = newCenter;
        
        //手势的效果会累加，translation一直累加
        //重新初始化，去除原来的累加效果
        [gesture setTranslation:CGPointZero inView:self.view];
    }
}

//点击手势处理
- (void)handleTapGesture:(UITapGestureRecognizer*)gesture
{
    //gesture.view; 代表手势发生在哪一个view上
    NSLog(@"点击了2次，手势识别成功");
}

//手势识别的过程，首先接受到touchbegin的事件，开始启动手势识别，手势的状态
//UIGestureRecognizerStatePossible,然后继续接收并分析触摸事件，如果手势识别成功，手势的状态变为UIGestureRecognizerStateBegan
//如果手势继续进行，手势的状态变为UIGestureRecognizerStateChanged
//如果手势结束，状态变为UIGestureRecognizerStateEnded
//如果手势识别失败 UIGestureRecognizerStateFailed
- (void)handleLongPressGesture:(UILongPressGestureRecognizer*)gestrue
{
    if (gestrue.state == UIGestureRecognizerStateBegan || gestrue.state == UIGestureRecognizerStateChanged) {
        NSLog(@"长按手势识别成功");
    }
    if (gestrue.state == UIGestureRecognizerStateEnded) {
        NSLog(@"手势识别结束");
    }
}

#pragma mark -
#pragma mark UIGestureReconigerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    if (gestureRecognizer.view == otherGestureRecognizer.view) {
        return YES;
    }
    return NO;
}