TableView 使用的小技巧

01-去除tableView plain 样式 SectionHeaderView 的悬浮方法：

//去除tableView 悬浮办法
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    CGFloat sectionHeaderHeight;
    if (IS_IPAD){
        sectionHeaderHeight = 88;
    }else if (IS_IPHONE6PLUS) {
        sectionHeaderHeight = 66;
    }else{
        sectionHeaderHeight = 52;
    }

    if (scrollView == _profileTableView) {
        //去掉UItableview的section的headerview黏性
        if (scrollView.contentOffset.y<=sectionHeaderHeight && scrollView.contentOffset.y>=0) {
            scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);
        } else if (scrollView.contentOffset.y>=sectionHeaderHeight) {
            scrollView.contentInset = UIEdgeInsetsMake(-sectionHeaderHeight, 0, 0, 0);
        }
    }
}```

#####悬浮中
![tableView去除sectionView悬浮.png](http:https://img.haomeiwen.com/i1054708/a67a01fc789278ed.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

#####去除掉悬浮
![悬浮效果已去除.png](http:https://img.haomeiwen.com/i1054708/328d041c9442daad.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

###02-TableView分隔线全部补全，也就是顶到头

```<objc>
#pragma mark 补全分隔线的方法
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([cell respondsToSelector:@selector(setSeparatorInset:)])
    {
        [cell setSeparatorInset:UIEdgeInsetsZero];
    }
    if ([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)])
    {
        [cell setPreservesSuperviewLayoutMargins:NO];
    }
    if ([cell respondsToSelector:@selector(setLayoutMargins:)])
    {
        [cell setLayoutMargins:UIEdgeInsetsZero];
    }
}

代码效果

tableView 分隔线顶头.png