ios之手势

做测试之用 

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 280, 480) ];
    view.backgroundColor = [UIColor grayColor];
    [self.view addSubview:view];
    [view release];
    
    UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"a.jpg"]];
    imageView.frame = CGRectMake(0, 0, 320, 480);
    imageView.userInteractionEnabled = YES;
    [self.view addSubview:imageView];
    [imageView release];
    
    // 手势
    // UITapGestureRecognizer 轻拍手势识别器 能识别轻拍操作
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];
    [imageView addGestureRecognizer:tap]; // 给视图添加手势
    [tap release];
    // 两根手指点两下
    tap.numberOfTapsRequired = 2; //必须点击的次数 默认为1
    tap.numberOfTouchesRequired = 2; //手指的数量
    
    // UILongPressGestureRecognizer 长按手势 能识别长按操作
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
    [imageView addGestureRecognizer:longPress];
    [longPress release];
    [longPress setMinimumPressDuration:2]; //设置长按时间2S 默认0.5S
    
    // UIRotationGestureRecognizer 旋转手势 能识别旋转
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
    [imageView addGestureRecognizer:rotation];
    [rotation release];
    
    // UIPinchGestureRecognizer 捏合手势 识别捏合
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
    [imageView addGestureRecognizer:pinch];
    [pinch release];
    
    // UIPanGestureRecognizer 拖放手势
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
    [imageView addGestureRecognizer:pan];
    [pan release];
    
    // UISwipeGestureRecognizer 轻扫手势
    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    [imageView addGestureRecognizer:swipe];
    swipe.direction = UISwipeGestureRecognizerDirectionRight; // 轻扫手势需要指定方向 默认right 指定多个方向会降低识别率
    [swipe release];
    
    // UIScreenEdgePanGestureRecognizer 屏幕边缘轻扫识别器 iOS7中新增的手势  (这个尚在摸索中)
    UIScreenEdgePanGestureRecognizer *screenEdgePanGesture = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(screen:)];
    //  边缘滑动，必须设置方向edges属性
    [screenEdgePanGesture setEdges:UIRectEdgeLeft];
    [imageView addGestureRecognizer:screenEdgePanGesture];

    
	// Do any additional setup after loading the view.
}

　　实现手势的方法

// 点按
- (void)tap:(UITapGestureRecognizer *)tap
{
    // 在开发过程中 如果没有必要，不要对一个控件即使用触摸 有使用手势
    NSLog(@"点我啦%@", tap);
}
- (void)longPress:(UILongPressGestureRecognizer *)longPress
{
    NSLog(@"long:%@", longPress);
}

// 旋转
- (void)rotation:(UIRotationGestureRecognizer *)rotation
{
    rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);

   // NSLog(@"%f", rotation.rotation);
    NSLog(@"%f", rotation.velocity); // 旋转的速度
    NSLog(@"rotation:%@", rotation);
    rotation.rotation = 0;           // 旋转角度
}

// 捏合
- (void)pinch:(UIPinchGestureRecognizer *)pinch
{
    NSLog(@"scale:%f", pinch.scale);
    NSLog(@"velocity:%f" ,pinch.velocity); // 速度
    
    NSLog(@"pinch:%@", pinch);
    pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
    pinch.scale = 1; // 比例复位
    
}

// 拖放手势
- (void)pan:(UIPanGestureRecognizer *)pan
{
    // 在拖放手势中是需要考虑手指的状态的UIGestureRecognizerState
    // 在拖放手势中使用的状态是UIGestureRecognizerStateChanged
    // 使用拖放手势的时候 当手指离开的时候，应该做一个很小的动作，提醒用户拖放完成
//    if (pan.state == UIGestureRecognizerStateChanged) {
//        [pan.view setCenter:[pan locationInView:self.view]];
//    }
    NSLog(@"pan:%@", pan);
    CGPoint point = [pan translationInView:pan.view];
    pan.view.transform = CGAffineTransformTranslate(pan.view.transform, point.x, point.y);
    [pan setTranslation:CGPointZero inView:pan.view];
   
    
}
// 轻扫手势
- (void)swipe:(UISwipeGestureRecognizer *)swipe
{
    NSLog(@"swipe：%@", swipe);
}
// 屏幕边缘轻扫手势 （一定要从屏幕的边缘开始）
- (void)screen:(UIScreenEdgePanGestureRecognizer *)screen
{
    NSLog(@"screen");
}