Swift 登錄后引用 storyboard 時導航欄不出現

Question

當我為應用程序啟動構建時，登錄和注冊工作正常，但是當它傳輸到 HomeVC storyboard 時，它顯示為空。 為了確保正確引用它，我在上面放置了標簽，而那些在構建過程中出現的標簽實際上仍然不可見的是導航欄。 請幫助:)

登錄和注冊中如何引用 HomeVC storyboard

登錄：

 else {
      let homeViewController = self.storyboard?.instantiateViewController(identifier: Constants.Storyboard.homeViewController) as? HomeViewController
       self.view.window?.rootViewController = homeViewController
       self.view.window?.makeKeyAndVisible()

報名：

func transitionToHome(){
     let homeViewController = storyboard?.instantiateViewController(identifier: Constants.Storyboard.homeViewController) as? HomeViewController
     view.window?.rootViewController = homeViewController
     view.window?.makeKeyAndVisible()

這里是登錄 storyboard

導航欄在故事板中清晰可見

Answer 1

你可以嘗試使用segue

// This is used to perform the segue with the approporiate identifier
    self.performSegue(withIdentifier: "Your unique identifer of the seugue", sender: self)

// Prepare for segue is used if you want to modify some properities in the desintation viewcontroller
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "Your identifier of the segue" {
        // This is used to fetch the destination and cast it to pass over the values
        if let dc = segue.destination as? YourClassOfTheDestination {
            // Here can you type into dc and pass over the values

            //Example
            dc.curentFruit = "Pear"
        }
    }
}

這是關於如何在 storyboard 中指定 segue 的自定義標識符的圖像。 這是圖像

如果您不希望導航欄在某些屏幕中可見，您可以簡單地使用：

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    self.navigationController?.navigationBar.isHidden = true
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillAppear(animated)

    self.navigationController?.navigationBar.isHidden = false
}

記得在視圖消失時讓它再次可見。

很好的問題，希望答案有幫助！

Answer 2

我相信問題是您正在使視圖 controller 成為關鍵 window 而您沒有添加導航 controller。 嘗試將主視圖控制器的導航 controller 設為鍵 window。