c# - 无法在 Portrait 中锁定一个 View Controller ，xamarin IOS

Question

我试图让一个 View Controller 纵向锁定，同时允许所有其他 View 为任何方向。这就是我试图放入我的 homeViewController 中的内容(我想保持纵向的那个)。

public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations()
    {
        return UIInterfaceOrientationMask.Portrait;
    }
    public override UIInterfaceOrientation PreferredInterfaceOrientationForPresentation()
    {
        return UIInterfaceOrientation.Portrait;
    }
    public override bool ShouldAutorotate()
    {
        return false;
    }

我正尝试在 c# 中的 xamarin 中执行此操作。有人有什么建议吗？

Answer 1

在 AppDelegate.cs 中添加这个

    public bool RestrictRotation
    {
        get;
        set;
    }

并将其添加到同一个 AppDelegate.cs 中，但在 FinishedLaunching() 方法之后

    [Export("application:supportedInterfaceOrientationsForWindow:")]
    public UIInterfaceOrientationMask  GetSupportedInterfaceOrientations(UIApplication application, IntPtr 
        forWindow)
    {
        if (this.RestrictRotation)
            return UIInterfaceOrientationMask.Portrait;
        else
            return UIInterfaceOrientationMask.All;
    }

将以下内容添加到您希望制作肖像的每个 View Controller

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

    public override bool ShouldAutorotate()
    {
        return false;
    }

    public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations()
    {
        return UIInterfaceOrientationMask.Portrait;
    }

    public override UIInterfaceOrientation PreferredInterfaceOrientationForPresentation()
    {
        return UIInterfaceOrientation.Portrait;
    }

    void RestrictRotation(bool restriction)
    {
        AppDelegate app = (AppDelegate)UIApplication.SharedApplication.Delegate;
        app.RestrictRotation = restriction;
    }