UITableViewCell设置系统分割线左边距

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    if ([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)]) {
        cell.preservesSuperviewLayoutMargins = NO;
       
    }
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
        [cell setLayoutMargins:UIEdgeInsetsZero];
    }
    return cell;
}

• 然后写代理方法

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
        [cell setSeparatorInset:UIEdgeInsetsMake(0, 10, 0, 10)];
    }
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
        [cell setLayoutMargins:UIEdgeInsetsMake(0, 10, 0, 10)];
    }

/*
// 左右边间距为0
    if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
        [cell setSeparatorInset:UIEdgeInsetsZero];
    }
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
        [cell setLayoutMargins:UIEdgeInsetsZero];
    }
*/
}

iOS 8.0 后才支持
self.tableView.separatorInset = UIEdgeInsetsZero;
// 最快捷的方法 --> 在自定义cell中的awakeFromNib:方法中设置
self.layoutMargins = UIEdgeInsetsZero;

// 万能方法
// 1.取消系统自带分割线 2.把tableView背景色设置为分割线的背景色 3.重写setFrame
- (void)setFrame:(CGRect)frame {
frame.size.height -= 1;
// 才是真正去给cell赋值
[super setFrame:frame];
}