先看一段demo的代码，这个一个好友列表部分代码，设置每个session的头标题为button
//设置组的头视图
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIButton * button = [UIButton buttonWithType:UIButtonTypeSystem];
button.backgroundColor = [UIColor cyanColor];
[button setTitle:[NSString stringWithFormat:@"第%ld组",section] forState:UIControlStateNormal];
[button addTarget:self action:@selector(buttonAC:) forControlEvents:UIControlEventTouchUpInside];
button.tag = section;
return button;
}