section所显示的灰色背景和白色字体是默认的,调用以下方法即可实现

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return [self.keys objectAtIndex:section];
}

如果想改变此处的背景与字体的话,官方没有开放接口去直接修改以上两个属性,所以,只有自己加Label,加View去实现,代码如下:

实现委托方法- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section


- (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;
}


需要注意的一点是:这个方法里返回视图的大小是固定不变的

The table view automatically adjusts the height of the section header to accommodate the returned view object. The table view does not call this method if it was created in a plain style (UITableViewStylePlain).