Xamarin iOS - 在列表视图行选择打开视图控制器

Posted 2023-02-23

【中文标题】Xamarin iOS - 在列表视图行选择打开视图控制器

【英文标题】：Xamrin iOS - On list view RowSelected open view controller

【发布时间】：2017-05-25 08:03:51

【问题描述】：

我是 ios 开发新手，我搜索了我的问题，但大多数解决方案都是针对 Swift 3。我正在 Xamarin Native iOS 中开发我的应用程序。

我有一个包含数据列表的 UITableView。我需要做的就是当我点击一行时，该事件将通过 ViewController 打开一个新页面，该页面将显示所选数据的详细信息。

这是我在 PlayersListController.cs 文件中的 UITableView 代码：

public override void ViewDidLoad() 
    base.ViewDidLoad();
    // Perform any additional setup after loading the view, typically from a nib.

    // THIS data GOES TO "PlayersListTableSource" CLASSS
    string[] data = new string[] 
        "Player One",
        "Player Two",
        "Player Three",
        "Player Four",
        "Player Five"
    ;


    UITableView myTable;

    myTable = new UITableView
    
        Frame = new CoreGraphics.CGRect(0, 30, View.Bounds.Width, View.Bounds.Height),
        Source = new PlayersListTableSource(data)
    ;

    View.AddSubview(myTable);

这是我的模型类 PlayersListTableSource.cspublic 类

PlayersListTableSource : UITableViewSource

public override void RowSelected(UITableView tableView, NSIndexPath indexPath)

// WHAT TO DO HERE…

new UIAlertView("Alert", "You touched: " + tableItems[indexPath.Row], null, "Ok", null).Show();

tableView.DeselectRow(indexPath, true);

// PlayerDetailController is my view controller I want to open on button click

// SOME THING LIKE THIS

PlayerDetailController PlayerDetailController = this.Storyboard.InstantiateViewController("PlayerDetailController") as PlayerDetailController;

this.NavigationController.PushViewController(PlayerDetailController, true);

【参考方案1】：

您的 UITableViewSource 通常没有指向导航控制器的指针，因此在大多数情况下，有必要提供它。下面的代码是做你想做的事情的一种非常基本的方式。

public override void ViewDidLoad() 

    base.ViewDidLoad();
    // Perform any additional setup after loading the view, typically from a nib.

    // THIS data GOES TO "PlayersListTableSource" CLASSS
    string[] data = new string[] 
        "Player One",
        "Player Two",
        "Player Three",
        "Player Four",
        "Player Five"
    ;


    UITableView myTable;

    myTable = new UITableView
    
        Frame = new CoreGraphics.CGRect(0, 30, View.Bounds.Width, View.Bounds.Height),
        Source = new PlayersListTableSource(data, this.NavigationController)
    ;

    View.AddSubview(myTable);

然后在您的源代码中，您只想保留导航控制器指针以用于行选择。

PlayersListTableSource : UITableViewSource

    private UINavigationController primNav get; set;


    public PlayersListTableSource(List<Object> myData, UINavigationController nav)
    
        //DO what you want with your data

        primNav = nav;
    

    public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
    
        new UIAlertView("Alert", "You touched: " + tableItems[indexPath.Row], null, "Ok", null).Show();

        tableView.DeselectRow(indexPath, true);

        // PlayerDetailController is my view controller I want to open on button click

        // SOME THING LIKE THIS

        PlayerDetailController PlayerDetailController = primNav.Storyboard.InstantiateViewController("PlayerDetailController") as PlayerDetailController;

        primNav.PushViewController(PlayerDetailController, true);
    

【讨论】：

我使用了你的代码。在以下行：PlayerDetailController PlayerDetailController = this.Storyboard.InstantiateViewController("PlayerDetailController") as PlayerDetailController; 我收到错误“不包含情节提要的定义并且没有扩展方法..”

@zainSMJ 道歉，应该是 primNav.Storyboard 我已经更改了上面的代码以反映这一点。

完美运行 :) 谢谢