如何使用UIActionSheet

UIActionSheet.m

// 定义一个UIActionSheet
UIActionSheet *actionSheet = [[UIActionSheet alloc]
                              initWithTitle:@"Are you sure?"
                              delegate:self
                              cancelButtonTitle:@"No Way!"
                              destructiveButtonTitle:@"Yes, I'm Sure"
                              // 其他按钮，没有直接写nil
                              otherButtonTitles:@"Foo",@"Bar",nil];
                              
// 放到View中显示
[actionSheet showInView:self.view];

// 当前view的controller即self，实现UIActionSheetDelegate方法
-(void)actionSheet:(UIActionSheet *)actionSheet
  didDismissWithButtonIndex:(NSInteger)buttonIndex
{
  if(buttonIndex != [actionSheet cancelButtonIndex])
  {
    // do something
  }
}