Question

从另一个视图控制器显示导航栏时，我无法在视图控制器中看到导航栏

我尝试保留

self.navigationController?.navigationBar.isHidden = false

，并且还尝试将导航控制器保留到嵌入的视图控制器中。

控制器A：-

let storyboard = UIStoryboard(name: "Main", bundle: nil)

let viewController =     
storyboard.instantiateViewController(withIdentifier:"Identifier")  as! B        

present(viewController, animated: true, completion: nil)

控制器B：-

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

    self.navigationController?.navigationBar.isHidden = false

}

Answer 1

如果您以编程方式进行操作，那么它将对您有所帮助：-

SWIFT 4

let vc = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "IKDetailVC") as? IKDetailVC
self.navigationController?.pushViewController(vc!, animated: true)

Answer 2

尝试

let storyboard = UIStoryboard(name: "Main", bundle: nil)

let ViewController =
storyboard.instantiateViewController(withIdentifier:"Identifier") as! B

let vc = UINavigationController(rootViewController: ViewController)

present(vc, animated: true, completion: nil)

Answer 3

在第一个视图控制器viewWillAppear（）中，添加以下内容：

override func viewWillAppear(animated: Bool) {
self.navigationController?.navigationBarHidden = true
}

在第二个中，添加以下内容：

override func viewWillAppear(animated: Bool) {

  self.navigationController?.navigationBarHidden = false

}

override func viewDidDisappear(animated: Bool) {

   self.navigationController?.navigationBarHidden = true
}

快乐编码

使用present来查看另一个视图控制器时看不到导航栏

3 个答案: