tableview section 的背景颜色怎么改变

方法一：调用
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView* myView = [[[UIView alloc] init] autorelease];
myView.backgroundColor = [UIColor colorWithRed:0.10 green:0.68 blue:0.94 alpha:0.7];
UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 90, 22)];
titleLabel.textColor=[UIColor whiteColor];
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.text=[self.keys objectAtIndex:section];
[myView addSubview:titleLabel];
[titleLabel release];
return myView;
}