iOS7,iOS8,TableViewCell分割线不顶格,在ViewController里面加上下面的俩个方法即可

//解决cell分割线位置问题
-(void)viewDidLayoutSubviews
{
    [super viewDidLayoutSubviews];
    
    if ([_tableView respondsToSelector:@selector(setSeparatorInset:)]) {
        [_tableView setSeparatorInset:UIEdgeInsetsMake(0,0,0,0)];
    }
    
    if ([_tableView respondsToSelector:@selector(setLayoutMargins:)]) {
        [_tableView setLayoutMargins:UIEdgeInsetsMake(0,0,0,0)];
    }
}

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