iOS手势之UISwipeGestureRecognizer的正确用法

今天，我在用到UISwipeGestureRecognizer滑动控制器的时候，发现无论往那个方向滑动，

swipe.direction的值都是3.

下面是我以前的代码：

UISwipeGestureRecognizer *swiperight=[[UISwipeGestureRecognizer
alloc]initWithTarget:self
action:@selector(swichController:)];

        //默认是UISwipeGestureRecognizerDirectionRight

        swiperight.direction=UISwipeGestureRecognizerDirectionRight|

UISwipeGestureRecognizerDirectionLeft
； 

        [self.collection
addGestureRecognizer:swiperight];

他是错误的。

正确的用法是，要创建俩个轻拍手势，分别设定他的方向才可以。

//添加轻扫手势

        

        UISwipeGestureRecognizer *swipe=[[UISwipeGestureRecognizer
alloc]initWithTarget:self
action:@selector(swichController:)];

        //默认是UISwipeGestureRecognizerDirectionRight

        swipe.direction=UISwipeGestureRecognizerDirectionLeft;

    

       

        [self.collection
addGestureRecognizer:swipe];

        

        UISwipeGestureRecognizer *swiperight=[[UISwipeGestureRecognizer
alloc]initWithTarget:self
action:@selector(swichController:)];

        //默认是UISwipeGestureRecognizerDirectionRight

        swiperight.direction=UISwipeGestureRecognizerDirectionRight;

        

        [self.collection
addGestureRecognizer:swiperight];