使用Xcode 6中的Storyboard的AppDelegate for Cocoa应用程序

截至目前(Xcode Beta-2),新的基于文档的应用程序没有附带存根AppDelegate.swift文件.相反,有ViewController.swift和Document.swift.更糟糕的是,Document.swift文件错误地为文档实例化了相同的Main.storyboard.

这是我开始工作的一种方式：

>创建一个AppDelegate类(例如：采用NSApplicationDelegate协议的NSObject)
>将Object对象从Object库拖到Main.storyboard的Application Scene中,并将其设置为AppDelegate类.
>从Application Scene中的Application对象控制拖动到AppDelegate对象,并连接其委托.
>从Main.storyboard中删除其他所有内容,并为“文档”窗口创建一个新的Document.storyboard.更改Document.swift文件以实例化该Storyboard而不是Main.
>如果除了文档窗口之外还想要一个主应用程序窗口和/或首选项窗口,请为这些窗口创建Application.storyboard和/或Preferences.storyboard,并使用AppDelegate类对它们进行实例化.这样,AppDelegate可以自定义主窗口外观并执行其他方便的操作,包括接收从应用程序中的任何窗口发送的IBActions.

以下是基于文档的应用程序的AppDelegate.swift文件的工作示例,该应用程序还具有单独的主要应用程序窗口和非模态首选项窗口：

//  AppDelegate.swift

import Cocoa

class AppDelegate: NSObject,NSApplicationDelegate {

    //init() {   
    //    super.init() 
    // remove this if you don't use it
    //}

    var application: NSApplication? = nil
    func applicationDidFinishLaunching(notification: NSNotification) {
        application = notification.object as? NSApplication

        let path = NSBundle.mainBundle().pathForResource("Defaults",ofType: "plist")
        let defaults = NSDictionary(contentsOfFile:path)
        NSUserDefaults.standardUserDefaults().registerDefaults(defaults)
        NSUserDefaultsController.sharedUserDefaultsController().initialValues = defaults
        NSUserDefaultsController.sharedUserDefaultsController().appliesImmediately = true

    }

    func applicationDidBecomeActive(notification: NSNotification) {
        if application?.orderedDocuments?.count < 1 { showApplication(self) }
    }

    //func applicationWillFinishLaunching(notification: NSNotification) {
        // remove this if you don't use it
     //}

    func applicationWillTerminate(notification: NSNotification) {
       NSUserDefaults.standardUserDefaults().synchronize()

    }

    func applicationShouldOpenUntitledFile(app: NSApplication) -> Bool { return false }

    func applicationShouldTerminateAfterLastwindowClosed(app: NSApplication) -> Bool { return false }

    var applicationController: NSWindowController?
    @IBAction func showApplication(sender : AnyObject) {
        if !applicationController {

            let storyboard = nsstoryboard(name: "Application",bundle: nil)
            applicationController = storyboard.instantiateInitialController() as? NSWindowController
            if let window = applicationController?.window {
                window.titlebarappearsTransparent = true
                window.titleVisibility = NSWindowTitleVisibility.Hidden
                window.styleMask |= NSFullSizeContentViewWindowMask
            }


        }
        if applicationController { applicationController!.showWindow(sender) }
    }

    var preferencesController: NSWindowController?
    @IBAction func showPreferences(sender : AnyObject) {
        if !preferencesController {
            let storyboard = nsstoryboard(name: "Preferences",bundle: nil)
            preferencesController = storyboard.instantiateInitialController() as? NSWindowController
        }
        if preferencesController { preferencesController!.showWindow(sender) }
    }

}