立即响应ScrollView上的子视图的手势

Posted 2020-06-23 Sinner_Yun

 

self.myScrollView.delaysContentTouches = YES;

self.myScrollView.CanCancelContentTouches=NO;

写了一个继承scrollview的类，并在里面实现了touch事件，但是如果要相应touch事件，必须要先让手指在scrollview上停留一会，否则，手指一滑动，直接进scroll的事件了，根本不会触发touch事件。

下面是我在scrollview里面重写的touch事件，那几个NSLog如果手指不停留，更本就不会触发！

 

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    NSLog(@"PageScrollView Touch begin");

    

    if(!self.dragging)

    {

        [[self nextResponder] touchesBegan:touches withEvent:event];

    }

    

    [super touchesBegan:touches withEvent:event];

}

 

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

{

    NSLog(@"PageScrollView Touch Move");

    if(!self.dragging)

    {

        [[self nextResponder] touchesMoved:touches withEvent:event];

    }

    

    [super touchesMoved:touches withEvent:event];

}

 

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

{

    NSLog(@"PageScrollView Touch End");

    if(!self.dragging)

    {

        [[self nextResponder] touchesEnded:touches withEvent:event];

    }

    

    [super touchesEnded:touches withEvent:event];

}

 

具体地实现有所不同，需要先将delaysContentTouches设 置为NO，CanCancelContentTouches设置为YES，而后使用- (BOOL)touchesShouldCancelInContentView:(UIView *)view来决定scrollview是否需要滚动。