Monotouch-弹出式窗口

问题描述

在iPhone上的Xcode中，我可以使用这样的代码显示一个弹出视图，该视图覆盖包括Tab栏等在内的所有内容-

On iPhone, in Xcode, I can show a popup view which overlays everything, including the Tab Bar, etc, by using code like this -

[[[[UIApplication sharedApplication] delegate] window] addSubview:mySpecialView];

我正在尝试在MonoTouch中执行相同的操作，而我正在使用的代码是这样-

I'm trying to do the same in MonoTouch, and the code I'm using is this -

UIApplication.SharedApplication.Delegate.Window.AddSubview(mySpecialView);

...但这会崩溃.有人知道我在做什么错吗?

...but this crashes. Does anyone have any idea what I'm doing wrong?

感谢您的帮助.

推荐答案

您没有说明它是如何崩溃的-但是我认为您在使用Window属性时正在使用ModelNotImplementedException，因为默认情况下未实现(并且用于情节提要).

You did not say how it crashed - but I assume you're having a ModelNotImplementedException while using the Window property since it's not implemented by default (and is meant for storyboard).

您可以实现它以返回(自动生成的)AppDelegate(AppDelegate.cs文件)的window字段，也可以公开与(静态)字段相同的变量.

You can either implement it to return the window field of the (autogenerated) AppDelegate (AppDelegate.cs file) or expose the same variable as a (static) field.

例如默认生成的代码

UIWindow window;

public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
    window = new UIWindow (UIScreen.MainScreen.Bounds);
    window.RootViewController = new UINavigationController ();
    window.MakeKeyAndVisible ();
    return true;
}

将成为:

static UIWindow window;

public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
    window = new UIWindow (UIScreen.MainScreen.Bounds);
    window.RootViewController = new UINavigationController ();
    window.MakeKeyAndVisible ();
    return true;
}

static public UIWindow Window {
    get { return window; }
}

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