Question

简而言之，我有一个SplitViewController作为RootController。在构造函数中，我添加了主控制器和明细控制器。详细信息控制器包装在导航控制器中。

        {
        _masterViewController = new MenuViewController();
        _inventories = new InventoriesViewController();

        _detailNavigationController = new UINavigationController(_inventories);

        ViewControllers = new UIViewController[] {
            _masterViewController,
            _detailNavigationController
        };

如何在详细信息导航栏上显示菜单（显示主菜单）后退按钮？

我们不使用情节提要

Answer 1

在ViewDidLoad（）方法中添加以下代码

        UIButton backButton = new UIButton();
        backButton.Frame = new CGRect(0,0,20,20);
        backButton.SetTitle("Back", UIControlState.Normal);
        backButton.SetTitleColor(UIColor.Gray, UIControlState.Normal);
        backButton.SetImage(new UIImage("back"), UIControlState.Normal);
        //backButton.SetImage(new UIImage("001.jpg"), UIControlState.Normal);
        backButton.TouchUpInside += (sender, e) =>
        {

            NavigationController.PopViewController(true);
        };
        UIBarButtonItem backItem = new UIBarButtonItem(backButton);

        NavigationItem.LeftBarButtonItem = backItem;

Answer 2

一段时间后，我在UISplitViewController上找到了属性

DisplayModeButtonItem

因此，在创建主控制器和明细控制器之后（详细控制器包装在UINavigationController中），我将DisplayModeButtonItem添加到了明细控制器的NavigationBar LeftItem中。它给了我想要的外观和行为

{
        _masterViewController = new MenuViewController();

        _inventories = new InventoriesViewController();
        _inventoriesNavigation = new UINavigationController(_inventories);

        _inventories.NavigationItem.LeftBarButtonItem = DisplayModeButtonItem;

        ViewControllers = new UIViewController[] {
            _masterViewController,
            _inventoriesNavigation
        };
}

Xamarin iOS返回主按钮未显示在详细信息视图中

2 个答案: