Swift2 で NavigationBar の 右にボタンを複数追加

MasterViewController.swift

    override func viewDidLoad() {

        super.viewDidLoad()

        // ボタン達
        let addButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Add, target: self, action: "insertNewObject:")
        let cameraButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Camera, target: self, action: "insertNewObject:")
        let myRightButtons = [addButton, cameraButton]

        // テンプレはこうだった
        //self.navigationItem.rightBarButtonItem = addButton

        // 右ボタン複数配置
        self.navigationItem.setRightBarButtonItems(myRightButtons, animated: true)
    }