uiscrollview uicollectionview touch事件传递问题

uiscrollview  uicollectionview 无法响应touch事件，解决方案，新建一个uiscrollview 的category

 @implementation UIScrollView (UITouch)
 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
 {
     //if(!self.dragging)
     {
         [[self nextResponder] touchesBegan:touches withEvent:event];
     }
     [super touchesBegan:touches withEvent:event];
 }
 -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
 {
     //if(!self.dragging)
     {
         [[self nextResponder] touchesMoved:touches withEvent:event];
     }
     [super touchesMoved:touches withEvent:event];
 }

 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
 {
     //if(!self.dragging)
     {
         [[self nextResponder] touchesEnded:touches withEvent:event];
     }
     [super touchesEnded:touches withEvent:event];
 }
 @end

uicollectionview 是继承uiscrollview，所以 也可以用此category，来截获touch事件