swift 纯代码创建mac osx app入口页面的方法.

百度无数,谷歌无数,都特么只有xib和storyboard的文章,但是个人就是喜欢纯代码,所以试验了无数次总结了下面的方法.

第一步创建工程,然后在工程里面删除 storyboard.
然后在AppDelegate 里面删除@NSApplicationMain这一句.
在info.plist里面删除NSMainStoryboardFile这一行.
这时候App就不会自动查找storyboard了.

第二步创建一个main.swift文件,代码如下:

import Cocoa
let delegate = AppDelegate()
NSApplication.shared().delegate = delegate
NSApplication.shared().run()

第三步在AppDelegate里面加上如下代码:

import Cocoa
class AppDelegate: NSObject, NSApplicationDelegate {
    var newWindow: NSWindow?
    var controller: ViewController?
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        newWindow = NSWindow(contentRect: NSMakeRect(200, 200, 300, 300), styleMask: .fullScreen, backing: .buffered, defer: false)
        controller = ViewController()
        let content = newWindow?.contentView!
        let view = controller?.view
        content?.addSubview(view!)
        newWindow?.makeKeyAndOrderFront(nil)
    }
}

第四步在ViewController里面加上如下代码:

import Cocoa
class ViewController: NSViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    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
    }
}

编译运行一下就会出现一个最原始的窗口,然后自己在里面加各种控件就好了

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