判断ScrollerView的滑动方向

@implementation XXXViewController{

                  CGFloat contentOffsetX;

                  CGFloat statrContentOffsetX;

                 CGFloat endContentOffsetX;

}

```

//拖动之前坐标

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{

                contentOffsetX = scrollView.contentOffset.x;

}

```

```

//拖动即将结束时的坐标

-(void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset{

                    startContentOffsetX = scrollView.contentOffset.x;

}

```

```

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

                  endContentOffsetX = scrollView.contentOffset.x;

       //从右向左滑动

        if (endContentOffsetX > startContentOffsetX && startContentOffsetX > contentOffsetX) {

            NSLog(@" 注意了，左滑了");

        }

        if (endContentOffsetX < startContentOffsetX && startContentOffsetX < contentOffsetX){       //从左向右滑动

                     NSLog(@" 注意了，右滑了");

       }

}

```

***提示***

将x换成y就可判断向上或者向下滑动了