Minimal Cocoa/Swift menu bar app doesn't want to run - xcode

Question

I'm trying to build a skeleton app in Swift where I basically only have a menu bar icon, and no window. Starting from a new Storyboard project in Xcode, it worked initially, but trying to get rid of the window, it doesn't seem to want to run anymore. I have the following:
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
}
}
In AppDelegate.swift (based on this tutorial). When running this through Xcode, I get some warnings:
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
From some Googling, it seems like I should be able to ignore these, but my statusBarItem no longer shows up. What am I missing?

Answer 1

You need to have main.swift with the code like below.
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()
}
The file name MUST be main.swift. Otherwise you will get the error, Expressions are not allowed at the top level, on the line of autoreleasepool.
I found the answer here:
https://stackoverflow.com/a/26322464/338986

Answer 2

I have had the same problem before and I found out that when there is no storyboard or something else is missing, the app doesn't even start. I suggest setting up a new project, add your status bar code and then just do two things:
Add the "Application is UIElement (Agent)" key to your info.plist file and set it to true
Go to your storyboard, select the windowcontroller and unckeck "Initial view controller" on the right in the property inspector
If you have any other question regarding a status bar item I'd love to help you