针对Swift 4更新

override func viewDidAppear() {
    let presOptions: NSApplication.PresentationOptions = [.fullScreen, .autoHideMenuBar]
    let optionsDictionary = [NSView.FullScreenModeOptionKey.fullScreenModeApplicationPresentationOptions: presOptions]
    view.enterFullScreenMode(NSScreen.main!, withOptions: optionsDictionary)
    view.wantsLayer = true
}

一种方法是覆盖NSViewController中的viewDidAppear：

class ViewController : NSViewController {

    override func viewDidAppear() {
        let presOptions: NSApplicationPresentationOptions = ([.FullScreen,.AutoHideMenuBar])   
        let optionsDictionary = [NSFullScreenModeApplicationPresentationOptions :
            NSNumber(unsignedLong: presOptions.rawValue)]
        self.view.enterFullScreenMode(NSScreen.mainScreen()!, withOptions:optionsDictionary)
        self.view.wantsLayer = true
        }
}

Apple Developer API Reference : viewDidAppear()

如果您想要不同的行为，当您将鼠标移到顶部时，菜单栏是可用的。然而，它开始时是一个正常大小的窗口，然后增长，所以这可能不是理想的取决于你正在做什么。

override func viewDidAppear() {
    view.window?.toggleFullScreen(self)
}