如何在objective c中将UIActionSheet显示在UIAlertView之上

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"选择操作"
                                                         delegate:self
                                                cancelButtonTitle:@"取消"
                                           destructiveButtonTitle:nil
                                                otherButtonTitles:@"操作1", @"操作2", nil];

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示"
                                                    message:@"请选择操作"
                                                   delegate:self
                                          cancelButtonTitle:@"取消"
                                          otherButtonTitles:@"显示操作菜单", nil];

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    // 处理UIActionSheet按钮点击事件
    if (buttonIndex == 0) {
        // 执行操作1
    } else if (buttonIndex == 1) {
        // 执行操作2
    }
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    // 处理UIAlertView按钮点击事件
    if (buttonIndex == 1) {
        // 显示UIActionSheet
        [actionSheet showInView:alertView];
    }
}

[alertView show];