关于UI的屏幕触控事件示例

------视图控制器的.m中------------

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    UIView *gestureView = [[UIView alloc]initWithFrame:CGRectMake(20, 50, 335, 400)];

    gestureView.backgroundColor = [UIColor purpleColor];

    [self.view addSubview:gestureView];

    /**********************点击手势***************************/

    UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap1Action:)];

    //一个点击手势，只能识别一种手势，单击和双击是两种不同的手势

    //点击次数

    tap1.numberOfTapsRequired = 1;

    //点击个数

    tap1.numberOfTouchesRequired  =1;

    //往gestureView张添加手势

    [gestureView addGestureRecognizer:tap1];

    UITapGestureRecognizer *tap2 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap2Action:)];

    tap2.numberOfTapsRequired = 2;

    [gestureView addGestureRecognizer:tap2];

    //如果参数中的手势触发了，则自身失效

    [tap1 requireGestureRecognizerToFail:tap2];

    /**********************轻扫手势**************************/

    UISwipeGestureRecognizer *swip = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipAction:)];

    //设置方向

    swip.direction = UISwipeGestureRecognizerDirectionLeft;

    [gestureView addGestureRecognizer:swip];

    /**********************平移手势**************************/

    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];

    [gestureView addGestureRecognizer:pan];

    /**********************长按手势**************************/

    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];

    //设置长按的最短时间

    longPress.minimumPressDuration = 2;

    [gestureView addGestureRecognizer:longPress];

    /**********************旋转手势**************************/

    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];

    [gestureView addGestureRecognizer:rotation];

    /**********************捏合手势**************************/

    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];

    [gestureView addGestureRecognizer:pinch];

}

- (void)tap1Action:(UITapGestureRecognizer *)tap1{

    NSLog(@"单击");

}

- (void)tap2Action:(UITapGestureRecognizer *)tap2{

    NSLog(@"双击");

}

- (void)swipAction:(UISwipeGestureRecognizer *)swip{

    if (swip.direction == UISwipeGestureRecognizerDirectionLeft) {

        NSLog(@"向左轻扫");

    }

}

- (void)panAction:(UIPanGestureRecognizer *)pan{

    CGPoint point = [pan locationInView:pan.view];

    NSLog(@"%@",NSStringFromCGPoint(point));

}

- (void)longPress:(UILongPressGestureRecognizer *)longPress{

    if (longPress.state == UIGestureRecognizerStateBegan) {

        NSLog(@"长按开始");

    }else if (longPress.state == UIGestureRecognizerStateEnded){

        NSLog(@"长按结束");

    }

}

- (void)rotation:(UIRotationGestureRecognizer *)rotation{

    //获取旋转的角度-----先得到弧度

    CGFloat r = rotation.rotation;

    //转成角度

    //180/PI = x/r

    NSLog(@"x is %.2f",180/M_PI*r);

}

- (void)pinch:(UIPinchGestureRecognizer *)pinch{

    //获得捏合的比例

    CGFloat scale = pinch.scale;

    pinch.view.transform  = CGAffineTransformMakeScale(scale, scale);

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end