- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
cell.separatorInset = UIEdgeInsetsZero;
cell.layoutMargins = UIEdgeInsetsZero;
cell.preservesSuperviewLayoutMargins = NO;
}
原文：http://www.cnblogs.com/niit-soft-518/p/7404941.html