blocks|key|16160|text|如果您知道所有其他视图都应该使该栏可见，则可以使用viewWillDisappear将其再次设置为可见。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|16161|在Swift中：|16162|override+func+viewWillAppear(_+animated:+Bool)+{
++++super.viewWillAppear(animated)
++++navigationController?.setNavigationBarHidden(true,+animated:+animated)
}

override+func+viewWillDisappear(_+animated:+Bool)+{
++++super.viewWillDisappear(animated)
++++navigationController?.setNavigationBarHidden(false,+animated:+animated)
}|code-block|syntax|javascript|16163|entityMap^0|P|H|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

If you know that all other views should have the bar visible, you could use <code>viewWillDisappear</code> to set it to visible again.

In Swift:

<pre><code>override func viewWillAppear(_ animated: Bool) {
 super.viewWillAppear(animated)
 navigationController?.setNavigationBarHidden(true, animated: animated)
}

override func viewWillDisappear(_ animated: Bool) {
 super.viewWillDisappear(animated)
 navigationController?.setNavigationBarHidden(false, animated: animated)
}
</code></pre>

blocks|key|16176|text|Swift+3|type|unstyled|depth|inlineStyleRanges|entityRanges|data|16177|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)
}|code-block|syntax|javascript|16178|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Swift 3

<pre><code>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)
}
</code></pre>

blocks|key|16218|text|在Swift+3中，您还可以使用isNavigationBarHidden属性来显示或隐藏导航栏|type|unstyled|depth|inlineStyleRanges|entityRanges|data|16219|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;
}|code-block|syntax|javascript|16220|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In Swift 3, you can use isNavigationBarHidden Property also to show or hide navigation bar

<pre><code>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;
}
</code></pre>

blocks|key|4523934|text|您可以在窗口控制器(Swift3)中执行此操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4523935|class+WindowController:+NSWindowController+{

++++override+func+windowDidLoad()+{
++++++++super.windowDidLoad()

++++++++window?.titleVisibility+=+.hidden
++++}
}|code-block|syntax|javascript|4523936|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can do it from the window controller (Swift3)

<pre><code>class WindowController: NSWindowController {

 override func windowDidLoad() {
 super.windowDidLoad()

 window?.titleVisibility = .hidden
 }
}
</code></pre>

blocks|key|16271|text|您还可以为此创建一个扩展，以便能够重用该扩展，而无需在每个视图控制器中反复实现此扩展。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|16272|import+UIKit

extension+UIViewController+{
++++func+hideNavigationBar(animated:+Bool){
++++++++//+Hide+the+navigation+bar+on+the+this+view+controller
++++++++self.navigationController?.setNavigationBarHidden(true,+animated:+animated)

++++}

++++func+showNavigationBar(animated:+Bool)+{
++++++++//+Show+the+navigation+bar+on+other+view+controllers
++++++++self.navigationController?.setNavigationBarHidden(false,+animated:+animated)
++++}

}|code-block|syntax|javascript|16273|因此，您可以使用下面的扩展方法|16274|++++override+func+viewWillAppear(_+animated:+Bool)+{
++++++++super.viewWillAppear(animated)
++++++++hideNavigationBar(animated:+animated)
++++}

++++override+func+viewWillDisappear(_+animated:+Bool)+{
++++++++super.viewWillDisappear(animated)
++++++++showNavigationBar(animated:+animated)
++++}|16275|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You could also create an extension for this so you will be able to reuse the extension without implementing this again and again in every view controller.

<pre><code>import UIKit

extension UIViewController {
 func hideNavigationBar(animated: Bool){
 // Hide the navigation bar on the this view controller
 self.navigationController?.setNavigationBarHidden(true, animated: animated)

 }

 func showNavigationBar(animated: Bool) {
 // Show the navigation bar on other view controllers
 self.navigationController?.setNavigationBarHidden(false, animated: animated)
 }

}
</code></pre>

So you can use the extension methods as below

<pre><code> override func viewWillAppear(_ animated: Bool) {
 super.viewWillAppear(animated)
 hideNavigationBar(animated: animated)
 }

 override func viewWillDisappear(_ animated: Bool) {
 super.viewWillDisappear(animated)
 showNavigationBar(animated: animated)
 }
</code></pre>

blocks|key|16306|text|我使用上面的变体，并将我的应用程序的各个部分嵌入到不同的NavControllers中。这样，我就不必重置可见性了。例如，在启动序列中非常有用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|16307|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I use a variant of the above, and isolate sections of my app to be embedded in differing NavControllers. This way, i don't have to reset visibility. Very useful in startup sequences, for example.

blocks|key|16339|text|在Swift中隐藏导航栏的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|16340|self.navigationController?.setNavigationBarHidden(true,+animated:+true)
self.navigationController?.navigationBar.isHidden+=+true
self.navigationController?.isNavigationBarHidden+=+true|code-block|syntax|javascript|16341|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Ways to hide Navigation Bar in Swift:

<pre><code>self.navigationController?.setNavigationBarHidden(true, animated: true)
self.navigationController?.navigationBar.isHidden = true
self.navigationController?.isNavigationBarHidden = true
</code></pre>

blocks|key|4524089|text|在Swift中显示导航栏的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4524090|self.navigationController?.setNavigationBarHidden(false,+animated:+true)
self.navigationController?.navigationBar.isHidden+=+false
self.navigationController?.isNavigationBarHidden+=+false|code-block|syntax|javascript|4524091|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Ways to show Navigation Bar in Swift:

<pre><code>self.navigationController?.setNavigationBarHidden(false, animated: true)
self.navigationController?.navigationBar.isHidden = false
self.navigationController?.isNavigationBarHidden = false
</code></pre>

blocks|key|16401|text|+++++private+func+setupView()+{
++++++++++++view.backgroundColor+=+.white
++++++++++++navigationController?.setNavigationBarHidden(true,+animated:+false)
++++++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|16402|替代方案|unstyled|16403|在viewDidLoad中使用此设置|16404|title+=+"Madman"
navigationController?.isNavigationBarHidden+=+false
navigationController?.navigationBar.prefersLargeTitles+=+true
navigationItem.largeTitleDisplayMode+=+.always|16405|检查Collectionview、scrollview或tableView的约束|16406|+NSLayoutConstraint.activate([
++++++++++++tableView.topAnchor.constraint(equalTo:+view.safeAreaLayoutGuide.topAnchor),
++++++++++++tableView.bottomAnchor.constraint(equalTo:+view.bottomAnchor),
++++++++++++tableView.leadingAnchor.constraint(equalTo:+view.leadingAnchor),
++++++++++++tableView.trailingAnchor.constraint(equalTo:+view.trailingAnchor)
++++++++])|16407|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$B|C]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$B|C]]|$1|O|3|-4|5|F|7|W|8|@]|9|@]|A|$]]]|P|$]]

<pre><code> private func setupView() {
 view.backgroundColor = .white
 navigationController?.setNavigationBarHidden(true, animated: false)
 }
</code></pre>
Alternative
in viewDidLoad use this settings
<pre><code>title = &quot;Madman&quot;
navigationController?.isNavigationBarHidden = false
navigationController?.navigationBar.prefersLargeTitles = true
navigationItem.largeTitleDisplayMode = .always
</code></pre>
Check the constraints of Collectionview, scrollview or tableView
<pre><code> NSLayoutConstraint.activate([
 tableView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
 tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
 tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
 tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor)
 ])
</code></pre>

blocks|key|4524140|text|在视图中调用set+hide方法会出现和消失。如果不调用视图中的方法，false.It将在完整的导航层次结构中隐藏导航栏|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4524141|+override+func+viewWillAppear(_+animated:+Bool)+{
++++super.viewWillAppear(animated)
++++self.navigationController?.setNavigationBarHidden(true,+animated:+true)
}

override+func+viewWillDisappear(_+animated:+Bool)+{
++++super.viewWillDisappear(animated)
++++self.navigationController?.setNavigationBarHidden(false,+animated:true)
}|code-block|syntax|javascript|4524142|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Call the set hide method in view Will appear and Disappear. if you will not call the method in view will disappear with status false.It will hide the navigation bar in complete navigation hierarchy 

<pre><code> override func viewWillAppear(_ animated: Bool) {
 super.viewWillAppear(animated)
 self.navigationController?.setNavigationBarHidden(true, animated: true)
}

override func viewWillDisappear(_ animated: Bool) {
 super.viewWillDisappear(animated)
 self.navigationController?.setNavigationBarHidden(false, animated:true)
}
</code></pre>

blocks|key|4524150|text|++++/*.++Swift+5++*/+++++
++++let+controller+=++self.storyboard?.instantiateViewController(withIdentifier:+"sc_userNavigation")+as!+UserNavigationViewController
++++let+navigationController+=+UINavigationController(rootViewController:+controller)
++++navigationController.setNavigationBarHidden(true,+animated:+false)
++++navigationController.modalPresentationStyle+=+.fullScreen
++++self.present(navigationController,+animated:+false,+completion:+nil)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4524151|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> /*. Swift 5 */ 
 let controller = self.storyboard?.instantiateViewController(withIdentifier: &quot;sc_userNavigation&quot;) as! UserNavigationViewController
 let navigationController = UINavigationController(rootViewController: controller)
 navigationController.setNavigationBarHidden(true, animated: false)
 navigationController.modalPresentationStyle = .fullScreen
 self.present(navigationController, animated: false, completion: nil)
</code></pre>

How can I hide a navigation bar from first ViewController or a particular ViewController in swift? 

I used the following code in <code>viewDidLoad()</code>:

<pre><code>override func viewDidLoad() {
 super.viewDidLoad()
 self.navigationController?.isNavigationBarHidden = true
}
</code></pre>

and also on <code>viewWillAppear</code>:

<pre><code>override func viewWillAppear(animated: Bool) {
 self.navigationController?.isNavigationBarHidden = true
}
</code></pre>

Both methods hide the navigation controller from all ViewControllers.

How to hide a navigation bar from first ViewController in Swift?

Swift

如何在swift中对first ViewController或特定ViewController隐藏导航栏？我在viewDidLoad()中使用了以下代码override func viewDidLoad() {    super.viewDidLoad()    self.navigationController?.i...

问如何在Swift的first ViewController中隐藏导航栏？
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