OS X NSStatusBar问题

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

@IBOutlet weak var statusMenu: NSMenu!

func applicationDidFinishLaunching(aNotification: NSNotification) {
    // Insert code here to initialize your application
    //var menu = NSMenu(title:"test");
    let statusBar=NSStatusBar.systemStatusBar();
    let statusItem=statusBar.statusItemWithLength(-1)
    statusItem.title = "cat"
    statusItem.highlightMode = true
    statusItem.menu = statusMenu

}

func applicationWillTerminate(aNotification: NSNotification) {
    // Insert code here to tear down your application
}

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