import UIKit class ViewController: UIViewController { // ボタンを用意 var addBtn: UIBarButtonItem! override func viewDidLoad() { super.viewDidLoad() // タイトルを付けておきましょう self.title = "Home" // addBtnを設置 addBtn = UIBarButtonItem(barButtonSystemItem: .Add, target: self, action: "onClick") self.navigationItem.rightBarButtonItem = addBtn } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning