IOS UITableView 上滑 下拉刷新 可以处理加载数据事件

 通过UIScrollView控件的事件来判断是上拉还是下拉刷新，然后做响应的操作

 - (void)scrollViewDidScroll:(UIScrollView *)scrollView{
         //康海涛测试Ok的
         CGPoint offset1 = scrollView.contentOffset;
         CGRect bounds1 = scrollView.bounds;
         CGSize size1 = scrollView.contentSize;
         UIEdgeInsets inset1 = scrollView.contentInset;
         float y1 = offset1.y + bounds1.size.height - inset1.bottom;
         float h1 = size1.height;
         if (y1 > tableViewController.frame.size.height) {
         flagShuaxin = YES;
         }
         else if (y1 < tableViewController.frame.size.height) {
         flagShuaxin = NO;
         }
         else if (y1 == tableViewController.frame.size.height) {
         DLog(@"%@", flagShuaxin ? @"上拉刷新" : @"下拉刷新");
         }
}