NSApplicationDelegate not working without storyboard

Question

I am trying to create a macOS application without a storyboard in Xcode 8 (stable) on macOS Sierra. However, my AppDelegate not triggered. Here is the code I have:

 import Cocoa @NSApplicationMain class AppDelegate: NSObject, NSApplicationDelegate { var window: NSWindow! override init() { super.init() print("Init") } func applicationDidFinishLaunching(_ aNotification: Notification) { print("Finished launching") // Create a window window = NSWindow() // Add the view controller let viewController = ViewController() window.contentView?.addSubview(viewController.view) // Show the window window.makeKeyAndOrderFront(nil) } } 

Neither call init , nor applicationDidFinishLaunching(_ aNotification: Notification) . Any help would be greatly appreciated.

Answer 1

You need to do a few things here.

• Remove NSMainStoryboardFile key / value from plist
• Subclass NSApplication and assign it to the Principal Class (NSPrincipalClass) key.

The name must be fully qualified with your module name.

3. Manually create your delegate in a subclass of NSApplication and assign it to the delegate property.

Make sure you keep a link to your delegate object. Ive just used let here.

 class GrookApplication: NSApplication { let strongDelegate = AppDelegate() override init() { super.init() self.delegate = strongDelegate } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } } 

for example, a simple delegate.

 @NSApplicationMain class AppDelegate: NSObject, NSApplicationDelegate { override init() { super.init() print("wassup") } func applicationDidFinishLaunching(_ aNotification: Notification) { print("yo! I'm alive") } } 

Answer 2

If someone is looking for a version of Swift (based on @WarrenBurtons answer).

Appdelegate

 @NSApplicationMain class AppDelegate: NSObject, NSApplicationDelegate { var window: NSWindow? func applicationDidFinishLaunching(_ aNotification: Notification) { // Insert code here to initialize your application window = NSWindow(contentViewController: RootViewController()) window?.makeKeyAndOrderFront(self) } } class RootViewController: NSViewController { override func loadView() { self.view = NSView() self.view.frame = NSRect(x: 0, y: 0, width: 600, height: 400) } } 

Subclass of NSApplication

 import Cocoa class Application: NSApplication { let strongDelegate = AppDelegate() override init() { super.init() self.delegate = strongDelegate } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } } 

Record Info.plist

 <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> ... <key>NSPrincipalClass</key> <string>$(PRODUCT_MODULE_NAME).Application</string> ... </dict> </plist> 

I also created the gist of this to keep me up to date with the new versions of Xcode / Swift. https://gist.github.com/florieger/7ac5e7155f6faf18666f92f7d82f6cbc

Edit: Be sure to remove Main.storyboard / MainMenu.xib, otherwise you can get two Windows in the user interface debugger.