通过弹出操作按钮(UIAlertAction)查看控制器导航/转换

// 创建弹出框
let alertController = UIAlertController(title: "导航/转换", message: "选择一个操作", preferredStyle: .actionSheet)

// 创建操作按钮
let viewAction = UIAlertAction(title: "查看控制器", style: .default) { (action) in
    // 执行查看控制器的操作
    let currentViewController = self.navigationController?.visibleViewController
    print("当前控制器：\(currentViewController)")
}

let navigateAction = UIAlertAction(title: "导航到其他页面", style: .default) { (action) in
    // 执行导航到其他页面的操作
    let otherViewController = OtherViewController()
    self.navigationController?.pushViewController(otherViewController, animated: true)
}

let cancelAction = UIAlertAction(title: "取消", style: .cancel, handler: nil)

// 将操作按钮添加到弹出框
alertController.addAction(viewAction)
alertController.addAction(navigateAction)
alertController.addAction(cancelAction)

// 在当前视图控制器中弹出弹出框
present(alertController, animated: true, completion: nil)