回答編集履歴

 

  override func viewDidLoad() {

  super.viewDidLoad()

  toolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: view.bounds.width, height: 35))

 

  // 初期状態のボタンをセット

  toolBar.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true

  toolBar.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true

  }

  func statusBarOne() {

  let leftButton = UIBarButtonItem(title: "????", style: .plain, target: self, action: #selector(barButtonOneTapped(_:)))

  let spacer = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)

  let spacer = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)

  toolBar.setItems([spacer, centerButton, spacer], animated: true)

  }

 

  @objc func barButtonOneTapped(_ sender: UIBarButtonItem) {

  // do something here

  print(#function)

  }

 

  @objc func barButtonTwoTapped(_ sender: UIBarButtonItem) {

  statusBarOne()

  }

  ```