blocks|key|94613|text|Swift+4/5示例|type|unstyled|depth|inlineStyleRanges|entityRanges|data|94614|button.target+=+self
button.action+=+#selector(buttonClicked(sender:))

@objc+func+buttonClicked(sender:+UIBarButtonItem)+{
++++++++
}|code-block|syntax|javascript|94615|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 4/5 example
<pre><code>button.target = self
button.action = #selector(buttonClicked(sender:))

@objc func buttonClicked(sender: UIBarButtonItem) {
 
}
</code></pre>

blocks|key|94658|text|希望这篇文章能帮上点忙|type|unstyled|depth|inlineStyleRanges|entityRanges|data|94659|假设你想在一个单独的文件中创建栏按钮(对于模块化方法)，并且想要把选择器返回给你的视图控制器，你可以这样做：|94660|您的实用程序文件|94661|class+GeneralUtility+{

++++class+func+customeNavigationBar(viewController:+UIViewController,title:String){
++++++++let+add+=+UIBarButtonItem(title:+"Play",+style:+.plain,+target:+viewController,+action:+#selector(SuperViewController.buttonClicked(sender:)));++
++++++viewController.navigationController?.navigationBar.topItem?.rightBarButtonItems+=+[add];
++++}
}|code-block|syntax|javascript|94662|然后创建一个SuperviewController类，并在其上定义相同的函数。|94663|class+SuperViewController:+UIViewController+{

++++override+func+viewDidLoad()+{
++++++++super.viewDidLoad()
++++++++++++//+Do+any+additional+setup+after+loading+the+view.
++++}
++++@objc+func+buttonClicked(sender:+UIBarButtonItem)+{

++++}
}|94664|并且在我们的基类(继承SuperviewController类)中重写相同的函数|94665|import+UIKit

class+HomeViewController:+SuperViewController+{

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

++++++++//+Do+any+additional+setup+after+loading+the+view.
++++}

++++override+func+viewWillAppear(_+animated:+Bool)+{
++++++++GeneralUtility.customeNavigationBar(viewController:+self,title:"Event");
++++}

++++@objc+override+func+buttonClicked(sender:+UIBarButtonItem)+{
++++++print("button+clicked")++++
++++}+
}|94666|现在，只需在您想要的任何类中继承SuperViewController。|94667|感谢你的阅读|94668|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|13|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|H|7|15|8|@]|9|@]|A|$I|J]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

May this one help a little more 

Let suppose if you want to make the bar button in a separate file(for modular approach) and want to give selector back to your viewcontroller, you can do like this :- 

your Utility File

<pre><code>class GeneralUtility {

 class func customeNavigationBar(viewController: UIViewController,title:String){
 let add = UIBarButtonItem(title: "Play", style: .plain, target: viewController, action: #selector(SuperViewController.buttonClicked(sender:))); 
 viewController.navigationController?.navigationBar.topItem?.rightBarButtonItems = [add];
 }
}
</code></pre>

Then make a SuperviewController class and define the same function on it.

<pre><code>class SuperViewController: UIViewController {

 override func viewDidLoad() {
 super.viewDidLoad()
 // Do any additional setup after loading the view.
 }
 @objc func buttonClicked(sender: UIBarButtonItem) {

 }
}
</code></pre>

and In our base viewController(which inherit your SuperviewController class) override the same function

<pre><code>import UIKit

class HomeViewController: SuperViewController {

 override func viewDidLoad() {
 super.viewDidLoad()

 // Do any additional setup after loading the view.
 }

 override func viewWillAppear(_ animated: Bool) {
 GeneralUtility.customeNavigationBar(viewController: self,title:"Event");
 }

 @objc override func buttonClicked(sender: UIBarButtonItem) {
 print("button clicked") 
 } 
}
</code></pre>

Now just inherit the SuperViewController in whichever class you want this barbutton.

Thanks for the read

How can the action for a custom UIBarButtonItem in Swift be set?

The following code successfully places the button in the navigation bar:

<pre><code>var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action:nil)
self.navigationItem.rightBarButtonItem = b
</code></pre>

Now, I would like to call <code>func sayHello() { println("Hello") }</code> when the button is touched. My efforts so far:

<pre><code>var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action:sayHello:)
// also with `sayHello` `sayHello()`, and `sayHello():`
</code></pre>

and..

<pre><code>var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action:@selector(sayHello:))
// also with `sayHello` `sayHello()`, and `sayHello():`
</code></pre>

and..

<pre><code>var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action:@selector(self.sayHello:))
// also with `self.sayHello` `self.sayHello()`, and `self.sayHello():`
</code></pre>

Note that <code>sayHello()</code> appears in the intellisense, but does not work.

Thanks for your help.

EDIT: For posterity, the following works:

<pre><code>var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action:"sayHello")
</code></pre>

How to set the action for a UIBarButtonItem 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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如何在Swift中设置自定义UIBarButtonItem的操作？下面的代码成功地将该按钮放置在导航栏中：var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action:nil)self.navigationItem.righ...

问如何在Swift中设置UIBarButtonItem的操作
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