UINavigationController 導覽控制器

一、移除預設window

二、AppDelegate.swift

• 建立UINavigationController

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
  // Override point for customization after application launch.
  
  // frame 滿屏
  window = UIWindow(frame: UIScreen.main.bounds)
  // 可見
  window!.makeKeyAndVisible()
  // 根試圖控制器(UIWindow)
  window!.rootViewController = UINavigationController(rootViewController: ViewController())
  
  return true
  }
  

三、ViewController.swift

• 宣告資料

  let WIDTH = UIScreen.main.bounds.size.width
  let HEIGHT = UIScreen.main.bounds.size.height
  

• viewDidLoad

  • 背景顏色

    view.backgroundColor = .lightGray
    

  • navigationItem

    // 標題        
    title = "標題測試"
    // 左按鈕, 自訂
    navigationItem.leftBarButtonItem =   UIBarButtonItem(title: "test",
                                                         style: .done,
                                                         target: self,
                                                         action: #selector(testpressed))
    // 左按鈕, 圖片
    // navigationItem.leftBarButtonItem = UIBarButtonItem(image: UIImage?,
    //                                                    style: .done,
    //                                                    target: self,
    //                                                    action: #selector(testpressed))
    // 右按鈕, 預設
    navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add,
                                                        target: self,
                                                        action: nil)
    /*
     UIBarButtonSystemItem
     .done             Done
     .cancel           Cancel
     .edit             Edit
     .save             Save
     .add              ＋
     .flexibleSpace    自適應佔位
     .fixedSpace       固定佔位
     .compose          矩形, 筆
     .reply            返回箭頭
     .action           矩形, 向上箭頭
     .organize         文件夾
     .bookmarks        書
     .search           放大鏡
     .refresh          順時針箭頭
     .stop             X
     .camera           相機
     .trash            垃圾桶
     .play             播放鍵
     .pause            暫停鍵
     .rewind           退回鍵
     .fastForward      快進鍵
     .undo             Undo
     .redo             Redo
     */
    

• 按鈕點選動作

  func testpressed(sender: UIBarButtonItem) {
      let alert = UIAlertController(title: "按鈕測試",
                                    message: "",
                                    preferredStyle: .alert)
          let cancel = UIAlertAction(title: "取消",
                                     style: .cancel,
                                     handler: nil)
          alert.addAction(cancel)
      present(alert, animated: true, completion: nil)
  }
  

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