如何从Swift中的第一个ViewController隐藏导航栏？

我怎样才能从第一个ViewController或一个特定的ViewController在swift中隐藏导航栏？

我在viewDidLoad()使用了下面的代码：

 override func viewDidLoad() { super.viewDidLoad() self.navigationController?.isNavigationBarHidden = true } 

也在viewWillAppear ：

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

这两种方法都隐藏了所有ViewController的导航控制器。

Answer 1

如果您知道所有其他视图都应该可见，则可以使用viewWillDisappear将其设置为可见。

Answer 2

Swift 3

 override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) // Hide the navigation bar on the this view controller self.navigationController?.setNavigationBarHidden(true, animated: animated) } override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) // Show the navigation bar on other view controllers self.navigationController?.setNavigationBarHidden(false, animated: animated) } 

Answer 3

您可以在viewWillDisappear取消隐藏navigationController

 override func viewWillDisappear(animated: Bool) { super.viewWillDisappear(animated) self.navigationController?.isNavigationBarHidden = false } 

Swift 3

 override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) self.navigationController?.setNavigationBarHidden(false, animated: animated) } 

Answer 4

在Swift 3中，您可以使用isNavigationBarHidden属性来显示或隐藏导航栏

 override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) // Hide the navigation bar for current view controller self.navigationController?.isNavigationBarHidden = true; } override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) // Show the navigation bar on other view controllers self.navigationController?.isNavigationBarHidden = false; } 

Answer 5

你也可以为此创build一个扩展，这样你就可以重复使用扩展，而不必在每个视图控制器中重复执行。

 import UIKit extension UIViewController { func hideNavigationBar(){ // Hide the navigation bar on the this view controller self.navigationController?.setNavigationBarHidden(true, animated: true) } func showNavigationBar() { // Show the navigation bar on other view controllers self.navigationController?.setNavigationBarHidden(false, animated: true) } } 

所以你可以使用下面的扩展方法

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

Answer 6

你可以从窗口控制器（Swift3）

 class WindowController: NSWindowController { override func windowDidLoad() { super.windowDidLoad() window?.titleVisibility = .hidden } }