Cocoa Xcode：使用 Swift 4 for Mac 以編程方式從 AppDelegate 打開窗口控制器？

Question

我正在制作一個簡單的菜單欄應用程序，它有 2 個項目 -首選項和退出

我想在單擊首選項時打開一個新窗口

目前我有

func applicationDidFinishLaunching(_ aNotification: Notification) {
        constructMenu()
    }

func constructMenu() {
        let menu = NSMenu()

        menu.addItem(NSMenuItem(
                       title: "Preferences...", 
                       action: #selector(AppDelegate.preferencesWindow(_:)), 
                       keyEquivalent: "P"))
        menu.addItem(NSMenuItem.separator())
        menu.addItem(NSMenuItem(
                       title: "Quit", 
                       action: #selector(NSApplication.terminate(_:)), 
                       keyEquivalent: "q"))

        statusItem.menu = menu
    }

@objc func preferencesWindow(_ sender: Any) {
        print("open preference window here")
        if let storyboard = NSStoryboard(name: NSStoryboard.Name(rawValue: "Main"), bundle: nil) {
            let controller = storyboard.instantiateControllerWithIdentifier("preferencesWindow")
 as NSViewController

            if let window = NSApplication.shared.mainWindow {
                window.contentViewController = controller // just swap
            }
        }
    }

但它在這一行拋出錯誤

if let storyboard = NSStoryboard(name: NSStoryboard.Name(rawValue: "Main"), bundle: nil) {

陳述

條件綁定的初始化程序必須具有 Optional 類型，而不是“NSStoryboard”

當我單擊首選項時，會記錄打印語句，但我不知道如何以編程方式打開 Window。

我剛剛從對象庫中拖出Window Controller 並為StoryBoard ID 指定了一個屬性值偏好窗口

由於上述錯誤，我也嘗試了以下方法

@objc func preferencesWindow(_ sender: Any) {
        print("open preference window here")
        let storyboard = NSStoryboard(name: NSStoryboard.Name(rawValue: "Main"), bundle: nil)
        let controller = storyboard.instantiateController(withIdentifier: NSStoryboard.SceneIdentifier(rawValue: "preferencesWindow")) as! NSViewController

        if let window = NSApplication.shared.mainWindow {
            window.contentViewController = controller // just swap
        }
    }

但它只記錄並且從不打開窗口。 我該怎么辦？

Answer 1

當我在 SO 上發布問題時，我會很快找到答案。 這對我有用

@objc func preferencesWindow(_ sender: Any) {
        var myWindow: NSWindow? = nil
        let storyboard = NSStoryboard(name: NSStoryboard.Name(rawValue: "Main"),bundle: nil)
        let controller = storyboard.instantiateController(withIdentifier: NSStoryboard.SceneIdentifier(rawValue: "preferencesWindow")) as! NSViewController
        myWindow = NSWindow(contentViewController: controller)
        NSApp.activate(ignoringOtherApps: true)
        myWindow?.makeKeyAndOrderFront(self)
        let vc = NSWindowController(window: myWindow)
        vc.showWindow(self)
    }