macos - OSX application without storyboard or xib files using Swift

Question

Unfortunately, I haven't found anything useful on the Internet - I wanted to know, what code I actually have to type for initializing an application without using storyboard or XIB files in Swift. I know I have to have a .swift file called main. But I don't know what to write in there (like do I need autoreleasepool or something like that?). For example, what would I do for initializing an NSMenu and how would I add a NSViewController to the active window (iOS's similar .rootViewController doesn't help). Thanks for any help ;)

Edit: I actually don't want to use @NSApplicationMain in front of the AppDelegate. I'd rather know what exactly happens there and then do it myself.

Answer 1

if you don't want to have the @NSApplicationMain attribute, do:

1. have a file main.swift

2. add following top-level code:

    import Cocoa
   
    let delegate = AppDelegate() //alloc main app's delegate class
    NSApplication.shared.delegate = delegate //set as app's delegate
    NSApplicationMain(CommandLine.argc, CommandLine.unsafeArgv) //start of run loop       
   
    // Old versions:
    //  NSApplicationMain(C_ARGC, C_ARGV)
    //  NSApplicationMain(Process.argc, Process.unsafeArgv);  
   

the rest should be inside your app delegate. e.g.:

import Cocoa

class AppDelegate: NSObject, NSApplicationDelegate {
    var newWindow: NSWindow?
    var controller: ViewController?
    
    func applicationDidFinishLaunching(aNotification: NSNotification) {
        newWindow = NSWindow(contentRect: NSMakeRect(10, 10, 300, 300), styleMask: .resizable, backing: .buffered, defer: false)
        
        controller = ViewController()
        let content = newWindow!.contentView! as NSView
        let view = controller!.view
        content.addSubview(view)
        
        newWindow!.makeKeyAndOrderFront(nil)
    }
}

then you have a viewController

import Cocoa

class ViewController : NSViewController {
    override func loadView() {
        let view = NSView(frame: NSMakeRect(0,0,100,100))
        view.wantsLayer = true
        view.layer?.borderWidth = 2
        view.layer?.borderColor = NSColor.red.cgColor
        self.view = view
    }
}