UITableview分割线

指定cell分割线补全：在cellForRowAtIndexPath代理中加入如下代码：

cell.preservesSuperviewLayoutMargins = NO;
cell.layoutMargins = UIEdgeInsetsZero;
cell.separatorInset = UIEdgeInsetsZero;

全局cell分割线补全：
在UIControllerView中加入重写如下方法：

- (void)viewDidLayoutSubviews {
    if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
        [self.tableView setSeparatorInset:UIEdgeInsetsMake(0,0,0,0)];
    }
    if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {
        [self.tableView setLayoutMargins:UIEdgeInsetsMake(0,0,0,0)];
    }
    if ([self respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)]) {
        [self setPreservesSuperviewLayoutMargins:NO];
    }
}

- (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];
    }
}

指定cell分割线隐藏：首先保证指定cell分割线已经补全，然后加入如下代码：

cell.separatorInset = UIEdgeInsetsMake(0, 0, 0, kDeviceWidth);

全局cell分割先隐藏：

self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;