UITableView选择某一行常用做法

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSArray *visibleIndexPaths = [tableView indexPathsForVisibleRows];
    for (NSIndexPath *ip in visibleIndexPaths) {
        UITableViewCell *clearCell = [tableView cellForRowAtIndexPath:ip];
        [clearCell setAccessoryType:UITableViewCellAccessoryNone];
    }
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    [cell setAccessoryType:UITableViewCellAccessoryCheckmark];

    [self.delegate chooserSelectedFriend:[self.friendList objectAtIndex:indexPath.row]];
    [self.navigationController popViewControllerAnimated:YES];
}