Xcode 模式窗口在全屏退出后消失

我正在开发一个OSX应用程序，我是Swift和OSX开发的新手。我有一个窗口，我想成为模态，有时会有很多内容显示，所以我想让它进入全屏模式。窗口笔尖和下面的代码完成了这一点，但退出全屏模式会导致窗口消失。如果我转到另一个桌面并返回，窗口将返回。下面是我的应用程序代理代码

import Cocoa

class AppDelegate: NSObject, NSApplicationDelegate {
    let theApp: NSApplication = NSApplication.sharedApplication()
    var fooController: FooController?

    func applicationDidFinishLaunching(aNotification: NSNotification?) {
        // Insert code here to initialize your application
    }

    @IBAction func sessionFoo(sender: AnyObject) {
        if fooController == nil {
            fooController = FooController(windowNibName: "FooWindow")
        }

        // This works when it returns from FullScreen but isn't modal
        // fooController!.showWindow(self)

        // This is modal but the window disappears when returning from FullScreen
        theApp.runModalForWindow(fooController!.window)
    }
}

在窗口的属性检查器中： 检查以下各项：

一切都是推断的行为 全屏是主窗口，我尝试了辅助窗口，但运气不好。 内存被缓冲

---

这是基于文档的应用程序的辅助窗口。我错过了什么？谢谢。

1.windowdelegate.windowDidExitFullScreen

2.设置NSWindow.Delegate

3.在WindowDidExitFull屏幕中调用NSWindow.MakeKeyandDerfront或NSWindow.OrderFront

public class tbWindowDelegate : NSWindowDelegate
{   
    public EventHandler WindowFullScreenDidExit;

    public override void DidExitFullScreen(NSNotification notification)
    {
        if (WindowFullScreenDidExit != null)
            WindowFullScreenDidExit(notification, EventArgs.Empty);
    }
}


public class tbWindow : NSWindow
{       
    protected bool mRunModal = false;
    protected tbWindowDelegate mDelegate = null;

    public tbWindow() : base()
    {
        this.InitEvent();
    }

    private void InitEvent()
    {           
        this.mDelegate = new tbWindowDelegate();
        this.mDelegate.WindowFullScreenDidExit = this.OnWindowFullScreenDidExit;
        this.Delegate = this.mDelegate;
    }


    protected virtual void OnWindowFullScreenDidExit(object sender, EventArgs e)
    {
        if (this.mRunModal)
        {
            //this.MakeKeyAndOrderFront(this);
            this.OrderFront(this);
        }

    }   

}

---

我想这是因为使一个窗口全屏显示结束了模式窗口。不，模式窗口没有结束。在全屏显示中，模式窗口显示并按需要运行。退出全屏会导致模式窗口不再可见，但主窗口仍无法像模式窗口出现时那样接收输入。切换到不同的OSX桌面并返回后，模式窗口将重新出现，并且仍然具有模式行为。

public class tbWindowDelegate : NSWindowDelegate
{   
    public EventHandler WindowFullScreenDidExit;

    public override void DidExitFullScreen(NSNotification notification)
    {
        if (WindowFullScreenDidExit != null)
            WindowFullScreenDidExit(notification, EventArgs.Empty);
    }
}


public class tbWindow : NSWindow
{       
    protected bool mRunModal = false;
    protected tbWindowDelegate mDelegate = null;

    public tbWindow() : base()
    {
        this.InitEvent();
    }

    private void InitEvent()
    {           
        this.mDelegate = new tbWindowDelegate();
        this.mDelegate.WindowFullScreenDidExit = this.OnWindowFullScreenDidExit;
        this.Delegate = this.mDelegate;
    }


    protected virtual void OnWindowFullScreenDidExit(object sender, EventArgs e)
    {
        if (this.mRunModal)
        {
            //this.MakeKeyAndOrderFront(this);
            this.OrderFront(this);
        }

    }   

}