blocks|key|1087072|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1087073|let+leftNavBarButton+=+UIBarButtonItem(customView:Yoursearchbar)
++self.navigationItem.leftBarButtonItem+=+leftNavBarButton|code-block|syntax|javascript|1087074|更新|offset|length|style|BOLD|1087075|您保留一个惰性的UISearchBar属性|1087076|lazy+++var+searchBar:UISearchBar+=+UISearchBar(frame:+CGRectMake(0,+0,+200,+20))|1087077|在viewDidLoad中|1087078|searchBar.placeholder+=+"Your+placeholder"
var+leftNavBarButton+=+UIBarButtonItem(customView:searchBar)
self.navigationItem.leftBarButtonItem+=+leftNavBarButton|1087079|如果要使用故事板，只需将搜索栏拖动为出口，则用出口搜索栏替换“懒惰”属性。|1087080|entityMap^0|0|0|0|2|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@$I|11|J|12|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

Try this

<pre><code>let leftNavBarButton = UIBarButtonItem(customView:Yoursearchbar)
 self.navigationItem.leftBarButtonItem = leftNavBarButton
</code></pre>

Update

You keep a lazy UISearchBar property

<pre><code>lazy var searchBar:UISearchBar = UISearchBar(frame: CGRectMake(0, 0, 200, 20))
</code></pre>

In viewDidLoad 

<pre><code>searchBar.placeholder = "Your placeholder"
var leftNavBarButton = UIBarButtonItem(customView:searchBar)
self.navigationItem.leftBarButtonItem = leftNavBarButton
</code></pre>

If you want to use storyboard
just drag your searchbar as a outlet,then replace the lazy property with your outlet searchbar

blocks|key|1890050|text|在您的视图中，控制器：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1890051|lazy+var+searchBar+=+UISearchBar(frame:+CGRectZero)

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

++++searchBar.placeholder+=+"Search"

++++navigationItem.titleView+=+searchBar
}|code-block|syntax|javascript|1890052|通过设置navigationItem.titleView，搜索栏将自动在iPhone和iPad设备上居中。注:仅用v8.4和v9.0测试|1890053|SWIFT+3+3|offset|length|style|BOLD|1890054|lazy+var+searchBar+=+UISearchBar(frame:+CGRect.zero)|1890055|entityMap^0|0|0|0|7|2|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|V|8|@$K|W|L|X|M|N]]|9|@]|A|$]]|$1|O|3|P|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

In your view controller:

<pre><code>lazy var searchBar = UISearchBar(frame: CGRectZero)

override func viewDidLoad() {
 super.viewDidLoad()

 searchBar.placeholder = "Search"

 navigationItem.titleView = searchBar
}
</code></pre>

Doing it this way, by setting the navigationItem.titleView, the search bar is automatically centered across the iPhone and iPad devices. Note: only tested with v8.4 and v9.0 

for SWIFT 3

<pre><code>lazy var searchBar = UISearchBar(frame: CGRect.zero)
</code></pre>

blocks|key|1087101|text|++++//+create+the+search+bar+programatically+since+you+won't+be
++++//+able+to+drag+one+onto+the+navigation+bar
++++searchBar+=+UISearchBar()
++++searchBar.sizeToFit()

++++//+the+UIViewController+comes+with+a+navigationItem+property
++++//+this+will+automatically+be+initialized+for+you+if+when+the
++++//+view+controller+is+added+to+a+navigation+controller's+stack
++++//+you+just+need+to+set+the+titleView+to+be+the+search+bar
++++navigationItem.titleView+=+searchBar|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1087102|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> // create the search bar programatically since you won't be
 // able to drag one onto the navigation bar
 searchBar = UISearchBar()
 searchBar.sizeToFit()

 // the UIViewController comes with a navigationItem property
 // this will automatically be initialized for you if when the
 // view controller is added to a navigation controller's stack
 // you just need to set the titleView to be the search bar
 navigationItem.titleView = searchBar
</code></pre>

blocks|key|1463758|text|func+searchBarSearchButtonClicked(_+searchBar:+UISearchBar)+{

++++searchBar.endEditing(true)
++++searchBar.text+=+nil
++++print("##+search+btn+clicked+:+\(searchBar.text+??+"")")
}+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1463759|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>func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {

 searchBar.endEditing(true)
 searchBar.text = nil
 print("## search btn clicked : \(searchBar.text ?? "")")
} 
</code></pre>

blocks|key|1087104|text|++++let+searchBar+=+UISearchBar()
++++searchBar.sizeToFit()
++++searchBar.placeholder+=+""
++++self.navigationController?.navigationBar.topItem?.titleView+=+searchBar|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1087105|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> let searchBar = UISearchBar()
 searchBar.sizeToFit()
 searchBar.placeholder = ""
 self.navigationController?.navigationBar.topItem?.titleView = searchBar
</code></pre>

blocks|key|1890112|text|将SearchBar设置为titleView，将navigationBar的高度更改为56。要解决这个问题，可以在视图中嵌入searchBar并将其设置为titleView。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1890113|++++var+offset:+CGFloat+=+20

++++//+If+VC+is+pushed,+back+button+should+be+visible
++++if+navigationController?.navigationBar.backItem+!=+nil+{
++++++++offset+=+40
++++}

++++let+customFrame+=+CGRect(x:+0,+y:+0,+width:+view.frame.size.width+-+offset,+height:+44.0)
++++let+searchBarContainer+=+UIView(frame:+customFrame)
++++searchBar+=+UISearchBar(frame:+customFrame)
++++searchBarContainer.addSubview(searchBar)
++++navigationItem.titleView+=+searchBarContainer|code-block|syntax|javascript|1890114|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|$]]

Setting SearchBar as titleView, changes height of navigationBar to 56. To fix this, you can embed searchBar in view and set that as titleView.

<pre><code> var offset: CGFloat = 20

 // If VC is pushed, back button should be visible
 if navigationController?.navigationBar.backItem != nil {
 offset = 40
 }

 let customFrame = CGRect(x: 0, y: 0, width: view.frame.size.width - offset, height: 44.0)
 let searchBarContainer = UIView(frame: customFrame)
 searchBar = UISearchBar(frame: customFrame)
 searchBarContainer.addSubview(searchBar)
 navigationItem.titleView = searchBarContainer
</code></pre>

blocks|key|1890185|text|适用于iOS+11及以上|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1890186|navigationItem.searchController+=+searchController|code-block|syntax|javascript|1890187|​|1890188|📷|atomic|offset|length|1890189|1890190|适用于iOS+10及以下版本|1890191|navigationItem.titleView+=+searchController.searchBar;|1890192|1890193|1890194|1890195|或者您可以将它指定为leftBarButtonItem，如this+answer中所描述的那样|1890196|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/b0a7caf01c949d6fc2139f84a8d556d6.jpg|imageAlt|1|https://developer.qcloudimg.com/http-save/yehe-900000/2978729ae7a1f322e179aed268a37d21.jpg|2|LINK|MUTABLE|url|https://stackoverflow.com/a/26726605/1599713^0|0|0|0|0|1|0|0|0|0|0|0|0|1|1|0|0|T|B|2|0^^$0|@$1|2|3|4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1E|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1F|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|1G|8|@]|9|@$L|1H|M|1I|1|1J]]|A|$]]|$1|N|3|H|5|6|7|1K|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1L|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|1M|8|@]|9|@]|A|$E|F]]|$1|S|3|H|5|6|7|1N|8|@]|9|@]|A|$]]|$1|T|3|J|5|K|7|1O|8|@]|9|@$L|1P|M|1Q|1|1R]]|A|$]]|$1|U|3|H|5|6|7|1S|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1T|8|@]|9|@$L|1U|M|1V|1|1W]]|A|$]]|$1|X|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14|15|-4]]|16|$5|10|11|12|A|$13|17|15|-4]]|18|$5|19|11|1A|A|$1B|1C]]]]

<h2>For iOS 11 and above</h2>

<pre><code>navigationItem.searchController = searchController
</code></pre>

<a href="https://i.stack.imgur.com/hLd8Q.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/hLd8Q.jpg" alt="enter image description here"></a>

<h2>For iOS 10 and below</h2>

<pre><code>navigationItem.titleView = searchController.searchBar;
</code></pre>

<a href="https://i.stack.imgur.com/Af2p9.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/Af2p9.jpg" alt="enter image description here"></a>

or you can assign it as leftBarButtonItem as described in <a href="https://stackoverflow.com/a/26726605/1599713">this answer</a>

blocks|key|1087181|text|在2019年，您应该使用UISearchController。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1087182|override+func+viewDidLoad()+{
++++super.viewDidLoad()

++++let+searchController+=+UISearchController(searchResultsController:+nil)
++++searchController.searchResultsUpdater+=+self.viewModel
++++searchController.obscuresBackgroundDuringPresentation+=+false
++++searchController.searchBar.placeholder+=+"Search+artists"
++++self.navigationItem.searchController+=+searchController
++++self.definesPresentationContext+=+true
}|code-block|syntax|javascript|1087183|有些类应该符合UISearchResultsUpdating。我通常将它作为扩展添加到我的ViewModel中。|1087184|extension+ArtistSearchViewModel:+UISearchResultsUpdating+{

func+updateSearchResults(for+searchController:+UISearchController)+{
++++print("Searching+with:+"+%2B+(searchController.searchBar.text+??+""))
++++let+searchText+=+(searchController.searchBar.text+??+"")
++++self.currentSearchText+=+searchText
++++search()
++++}
}|1087185|这会产生这样的东西：|1087186|​|1087187|📷|atomic|offset|length|1087188|1087189|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/4cc700f69cb7a05b72287c1943c096c9.png|imageAlt^0|0|0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|15|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|17|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|18|8|@]|9|@]|A|$]]|$1|O|3|P|5|Q|7|19|8|@]|9|@$R|1A|S|1B|1|1C]]|A|$]]|$1|T|3|N|5|6|7|1D|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11|12|-4]]]]

In 2019, you should use UISearchController.

<pre><code>override func viewDidLoad() {
 super.viewDidLoad()

 let searchController = UISearchController(searchResultsController: nil)
 searchController.searchResultsUpdater = self.viewModel
 searchController.obscuresBackgroundDuringPresentation = false
 searchController.searchBar.placeholder = "Search artists"
 self.navigationItem.searchController = searchController
 self.definesPresentationContext = true
}
</code></pre>

And some class should conform to UISearchResultsUpdating. I usually add this as extension to my ViewModel.

<pre><code>extension ArtistSearchViewModel: UISearchResultsUpdating {

func updateSearchResults(for searchController: UISearchController) {
 print("Searching with: " + (searchController.searchBar.text ?? ""))
 let searchText = (searchController.searchBar.text ?? "")
 self.currentSearchText = searchText
 search()
 }
}
</code></pre>

This will spawn something like this:

<a href="https://i.stack.imgur.com/ztdpI.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ztdpI.png" alt="search bar"></a>

blocks|key|1087251|text|Swift+5，XCode+11，Storyboard方式，这样您就可以轻松地通过情节提要添加所有搜索栏属性，并且在视图控制器类中有少代码。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1087252|(+1.)将搜索栏视图添加为视图控制器.中的外部视图|1087253|​|1087254|📷|atomic|1087255|1087256|(+2.)将searchBarView连接到您的视图控制器.|1087257|1087258|1087259|1087260|(+3.)将searchBarView添加到navigationBar标题项中。|1087261|navigationItem.titleView+=+searchBarView|code-block|syntax|javascript|1087262|结果：|1087263|1087264|1087265|1087266|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/db8d26d5196b6a32e737e180d5097d89.gif|imageAlt|1|https://developer.qcloudimg.com/http-save/yehe-900000/49e5771044ebf310d9e15fe892515567.gif|2|https://developer.qcloudimg.com/http-save/yehe-900000/01549fbac2688739406b1c4e06dbcc40.jpg^0|15|4|1V|2|0|2|I|0|0|0|1|0|0|0|2|S|0|0|0|1|1|0|0|2|12|0|0|0|3|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|1H|8|@$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1P|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1Q|8|@]|D|@$9|1R|A|1S|1|1T]]|E|$]]|$1|M|3|I|5|6|7|1U|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1V|8|@$9|1W|A|1X|B|C]]|D|@]|E|$]]|$1|P|3|I|5|6|7|1Y|8|@]|D|@]|E|$]]|$1|Q|3|K|5|L|7|1Z|8|@]|D|@$9|20|A|21|1|22]]|E|$]]|$1|R|3|I|5|6|7|23|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|24|8|@$9|25|A|26|B|C]]|D|@]|E|$]]|$1|U|3|V|5|W|7|27|8|@]|D|@]|E|$X|Y]]|$1|Z|3|10|5|6|7|28|8|@$9|29|A|2A|B|C]]|D|@]|E|$]]|$1|11|3|I|5|6|7|2B|8|@]|D|@]|E|$]]|$1|12|3|K|5|L|7|2C|8|@]|D|@$9|2D|A|2E|1|2F]]|E|$]]|$1|13|3|I|5|6|7|2G|8|@]|D|@]|E|$]]|$1|14|3|-4|5|6|7|2H|8|@]|D|@]|E|$]]]|15|$16|$5|17|18|19|E|$1A|1B|1C|-4]]|1D|$5|17|18|19|E|$1A|1E|1C|-4]]|1F|$5|17|18|19|E|$1A|1G|1C|-4]]]]

Swift 5, XCode 11, Storyboard way so you can easily add all the search bar attributes through the storyboard and you have less code in your view controller class.
1.) Add your search bar view as external view in viewcontroller.
<a href="https://i.stack.imgur.com/M33oh.gif" rel="noreferrer"><img src="https://i.stack.imgur.com/M33oh.gif" alt="enter image description here" /></a>
2.) Connect searchBarView to you viewcontroller.
<a href="https://i.stack.imgur.com/oG49a.gif" rel="noreferrer"><img src="https://i.stack.imgur.com/oG49a.gif" alt="enter image description here" /></a>
3.) Add your searchBarView to your navigationBar title item.
<pre><code>navigationItem.titleView = searchBarView
</code></pre>
Result:
<a href="https://i.stack.imgur.com/pp9qU.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/pp9qU.jpg" alt="enter image description here" /></a>

blocks|key|1087290|text|适用于Swift+5或字母|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1087291|此外，您也可以使用此代码。完全编程的|1087292|import+UIKit

class+SearchTableViewController:+UITableViewController+{

private+lazy+var+searchController:+UISearchController+=+{
++++let+sc+=+UISearchController(searchResultsController:+nil)
++++sc.searchResultsUpdater+=+self
++++sc.delegate+=+self
++++sc.obscuresBackgroundDuringPresentation+=+false
++++sc.searchBar.placeholder+=+"Enter+A+Compiny+Name+Or+Symbole"
++++sc.searchBar.autocapitalizationType+=+.allCharacters
++++return+sc
}()

override+func+viewDidLoad()+{
++++super.viewDidLoad()
++++setupNavigationBar()
}

+++private+func+setupNavigationBar()+{
+++++++navigationItem.searchController+=+searchController
+++}

+}

//+MARK:+-+UISearchResult+Updating+and+UISearchControllerDelegate++Extension
++extension+SearchTableViewController:+UISearchResultsUpdating,+UISearchControllerDelegate+{
++++func+updateSearchResults(for+searchController:+UISearchController)+{
++++
++++}
+}|code-block|syntax|javascript|1087293|​|1087294|📷|atomic|1087295|1087296|1087297|1087298|1087299|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/2276e8b0f3ff310cc53cf3e4d92b959f.jpg|imageAlt|1|https://developer.qcloudimg.com/http-save/yehe-900000/b1988755b59899aaffcde179d1afc5d1.jpg^0|0|D|0|0|0|0|0|1|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1A|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1B|8|@]|D|@]|E|$]]|$1|O|3|P|5|Q|7|1C|8|@]|D|@$9|1D|A|1E|1|1F]]|E|$]]|$1|R|3|N|5|6|7|1G|8|@]|D|@]|E|$]]|$1|S|3|N|5|6|7|1H|8|@]|D|@]|E|$]]|$1|T|3|P|5|Q|7|1I|8|@]|D|@$9|1J|A|1K|1|1L]]|E|$]]|$1|U|3|N|5|6|7|1M|8|@]|D|@]|E|$]]|$1|V|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]]|W|$X|$5|Y|Z|10|E|$11|12|13|-4]]|14|$5|Y|Z|10|E|$11|15|13|-4]]]]

For Swift 5 or letter
also, you can use this code. Fully Programmatically
<pre><code>import UIKit

class SearchTableViewController: UITableViewController {

private lazy var searchController: UISearchController = {
 let sc = UISearchController(searchResultsController: nil)
 sc.searchResultsUpdater = self
 sc.delegate = self
 sc.obscuresBackgroundDuringPresentation = false
 sc.searchBar.placeholder = &quot;Enter A Compiny Name Or Symbole&quot;
 sc.searchBar.autocapitalizationType = .allCharacters
 return sc
}()

override func viewDidLoad() {
 super.viewDidLoad()
 setupNavigationBar()
}

 private func setupNavigationBar() {
 navigationItem.searchController = searchController
 }

 }

// MARK: - UISearchResult Updating and UISearchControllerDelegate Extension
 extension SearchTableViewController: UISearchResultsUpdating, UISearchControllerDelegate {
 func updateSearchResults(for searchController: UISearchController) {
 
 }
 }
</code></pre>
<a href="https://i.stack.imgur.com/Y2TvO.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Y2TvO.jpg" alt="After Clicking Search " /></a>
<a href="https://i.stack.imgur.com/YeuKv.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YeuKv.jpg" alt="After Clicking Cancel Button In Search " /></a>

So I've tried everything trying to get a search bar into the navigation bar in Swift. But sadly I haven't gotten it working, just yet... 

For those of you who don't know what I'm talking about, I'm trying to do something like this

<img src="https://i.stack.imgur.com/o9pT7.png" alt="enter image description here">

Note the search bar in the navigation bar. So here's what I'm currently using 

<pre><code>self.searchDisplayController?.displaysSearchBarInNavigationBar = true
</code></pre>

I popped that in my <code>viewDidLoad</code>, and then when I load up the app I'm presented with, just an empty navigation bar.... :( Any ideas?

Get search bar in navigation bar in Swift

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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所以我已经尝试了所有的方法，试图在Swift的导航栏中找到一个搜索栏。但遗憾的是我还没让它起作用，只是.对于那些不知道我在说什么的人，我想做这样的事情​​注意导航栏中的搜索栏。下面是我目前正在使用的self.searchDisplayController?.displaysSearchBarInNavigationBa...

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