UIScrollView滑动停止监听

如何监测UITableView等UIScrollView滑动停止呢？
有两种方式：

第一种：

-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
    if (!decelerate) {
        BOOL dragToDragStop = scrollView.tracking && !scrollView.dragging && !scrollView.decelerating;
        if (dragToDragStop) {
            [self scrollViewDidEndScroll];
        }
    }
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
    BOOL scrollToScrollStop = !scrollView.tracking && !scrollView.dragging && !scrollView.decelerating;
    if (scrollToScrollStop) {
        [self scrollViewDidEndScroll];
    }
}


- (void)scrollViewDidEndScroll {
   //在这里写监听滑动停止要做的事
}

第二种：

-(void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if ([self.mainDelegate respondsToSelector:@selector(mainScrollViewDidScroll:)]) {
        [self.mainDelegate mainScrollViewDidScroll:scrollView];
    }
    [NSObject cancelPreviousPerformRequestsWithTarget:self];
    [self performSelector:@selector(scrollViewDidEndScrollingAnimation:) withObject:nil afterDelay:0.1];
}

-(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
{
    [NSObject cancelPreviousPerformRequestsWithTarget:self];
    //在这里写监听滑动停止要做的事
}

参考：
Hook系统代理方法，添加UIScrollView滚动停止回调
iphone - How to detect when a UIScrollView has finished scrolling - Stack Overflow