iOS透明UIButton实现方法

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section 

{ 

 UIButton *sbutton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 


 sbutton.backgroundColor = [UIColor clearColor]; 


 [sbutton addTarget:self action:@selector(changename) forControlEvents:UIControlEventTouchUpInside]; 


 return sbutton; 


}