xcode - 最小的 Cocoa/Swift 菜单栏应用程序不想运行

Question

我正在尝试在 Swift 中构建一个框架应用程序，我基本上只有一个菜单栏图标，没有窗口。从 Xcode 中的一个新的 Storyboard 项目开始，它最初可以工作，但是试图摆脱窗口，它似乎不想再运行了。我有以下内容:

import Cocoa
import AppKit

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

    var window = NSWindow()
    var statusBar = NSStatusBar.systemStatusBar()
    var statusBarItem : NSStatusItem = NSStatusItem()

    override func awakeFromNib() {
        statusBarItem = statusBar.statusItemWithLength(-1)
        statusBarItem.title = "Test"
    }

    func applicationDidFinishLaunching(aNotification: NSNotification) {
        sleep(10);
    }

    func applicationWillTerminate(aNotification: NSNotification) {
        // Insert code here to tear down your application
    }

}

在 AppDelegate.swift 中(基于 this tutorial )。通过 Xcode 运行它时，我收到一些警告:

2015-06-23 22:20:28.444 PENCloud[19491:3303755] Failed to connect (colorGridView) outlet from (NSApplication) to (NSColorPickerGridView): missing setter or instance variable
2015-06-23 22:20:28.444 PENCloud[19491:3303755] Failed to connect (view) outlet from (NSApplication) to (NSColorPickerGridView): missing setter or instance variable

从一些谷歌搜索中，似乎我应该能够忽略这些，但我的 statusBarItem 不再显示。我错过了什么？

Answer 1

你需要有如下代码的main.swift。

import Cocoa

class AppDelegate: NSObject, NSApplicationDelegate {

    var statusBarItem : NSStatusItem!

    func applicationDidFinishLaunching(aNotification: NSNotification) {
        statusBarItem = statusBar.statusItemWithLength(-1)
        statusBarItem.title = "Test"
    }

    func applicationWillTerminate(aNotification: NSNotification) {
        // Insert code here to tear down your application
    }

}

autoreleasepool { () -> () in
    let app = NSApplication.sharedApplication()
    let delegate = AppDelegate()
    app.delegate = delegate
    app.run()
}

文件名必须是 main.swift。否则你会得到错误，Expressions is not allowed at the top level, on the line of autoreleasepool.

我在这里找到了答案: https://stackoverflow.com/a/26322464/338986