blocks|key|1159576|text|首先，将您的文件委托给UITextField|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1159577|@interface+MYLoginViewController+()+<UITextFieldDelegate>

@end|code-block|syntax|javascript|1159578|然后将此方法添加到您的代码中。|1159579|-+(BOOL)textFieldShouldReturn:(UITextField+*)textField+{++++++++
++++[textField+resignFirstResponder];
++++return+YES;
}|1159580|还要添加self.textField.delegate+=+self;|offset|length|style|CODE|1159581|entityMap^0|0|0|0|0|4|V|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]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@$M|X|N|Y|O|P]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

First make your file delegate for UITextField

<pre><code>@interface MYLoginViewController () &lt;UITextFieldDelegate&gt;

@end
</code></pre>

Then add this method to your code. 

<pre><code>- (BOOL)textFieldShouldReturn:(UITextField *)textField { 
 [textField resignFirstResponder];
 return YES;
}
</code></pre>

Also add <code>self.textField.delegate = self;</code>

blocks|key|945841|text|在viewDidLoad中声明：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|945842|[yourTextField+setDelegate:self];|945843|然后，包含委托方法的覆盖：|945844|-(BOOL)textFieldShouldReturn:(UITextField+*)textField
{
++++[textField+resignFirstResponder];
++++return+YES;
}|code-block|syntax|javascript|945845|entityMap^0|1|B|0|0|X|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|W|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|X|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

In <code>viewDidLoad</code> declare: 

<code>[yourTextField setDelegate:self];</code>

Then, include the override of the delegate method:

<pre><code>-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
 [textField resignFirstResponder];
 return YES;
}
</code></pre>

blocks|key|1159846|text|在swift中这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1159847|首先，在你的ViewController中实现这个UITextFieldDelegate。|offset|length|style|CODE|1159848|class+MyViewController:+UIViewController,+UITextFieldDelegate+{
....
}|code-block|syntax|javascript|1159849|现在将一个委托添加到一个TextField，在该委托中，无论是在下面这样的viewDidLoad方法中，还是在您初始化它的地方，您都希望在点击return时关闭键盘。例如。|1159850|override+func+viewDidLoad()+{

++++super.viewDidLoad()+++
++++myTextField.delegate+=+self
}|1159851|现在添加此方法。|1159852|func+textFieldShouldReturn(textField:+UITextField)+->+Bool+{

++++textField.resignFirstResponder()
++++return+true
}|1159853|entityMap^0|0|6|E|P|J|0|0|C|9|11|B|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]|$D|10|E|11|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|13|8|@$D|14|E|15|F|G]|$D|16|E|17|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|18|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|T|5|J|7|1A|8|@]|9|@]|A|$K|L]]|$1|U|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|V|$]]

In swift do like this: 
First in your <code>ViewController</code> implement this <code>UITextFieldDelegate</code>
For eg.

<pre><code>class MyViewController: UIViewController, UITextFieldDelegate {
....
}
</code></pre>

Now add a delegate to a <code>TextField</code> in which you want to dismiss the keyboard when return is tapped either in <code>viewDidLoad</code> method like below or where you are initializing it.
For eg.

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

 super.viewDidLoad() 
 myTextField.delegate = self
}
</code></pre>

Now add this method.

<pre><code>func textFieldShouldReturn(textField: UITextField) -&gt; Bool {

 textField.resignFirstResponder()
 return true
}
</code></pre>

blocks|key|1159983|text|Swift+4|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1159984|在视图控制器、field.delegate+=+self中设置UITextField的委托，然后：|offset|length|style|CODE|1159985|extension+ViewController:+UITextFieldDelegate+{
++++func+textFieldShouldReturn(_+textField:+UITextField)+->+Bool+{
++++++++//+don't+force+`endEditing`+if+you+want+to+be+asked+for+resigning
++++++++//+also+return+real+flow+value,+not+strict,+like:+true+/+false
++++++++return+textField.endEditing(false)
++++}
}|code-block|syntax|javascript|1159986|entityMap^0|0|7|L|V|B|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@$D|Q|E|R|F|G]|$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|U|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

<h1>Swift 4</h1>

Set delegate of <code>UITextField</code> in view controller, <code>field.delegate = self</code>, and then:

<pre><code>extension ViewController: UITextFieldDelegate {
 func textFieldShouldReturn(_ textField: UITextField) -&gt; Bool {
 // don't force `endEditing` if you want to be asked for resigning
 // also return real flow value, not strict, like: true / false
 return textField.endEditing(false)
 }
}
</code></pre>

blocks|key|1159540|text|设置UITextField的委托，并覆盖textFieldShouldReturn方法，在该方法中只需编写以下两行：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1159541|[textField+resignFirstResponder];
return+YES;|code-block|syntax|javascript|1159542|就这样。在编写代码之前，不要忘记设置UITextField的委托，并在属性窗口中设置Return键类型为"Done“。(command%2B+shift+%2B+I)。|1159543|entityMap^0|2|B|K|L|0|0|I|B|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

set delegate of <code>UITextField</code>, and over ride, <code>textFieldShouldReturn</code> method, in that method just write following two lines:

<pre><code>[textField resignFirstResponder];
return YES;
</code></pre>

that's it. Before writing a code dont forget to set delegate of a <code>UITextField</code> and set Return key type to "Done" from properties window.(command + shift + I).

blocks|key|1159753|text|尝尝这个,|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1159754|[textField+setDelegate:+self];|code-block|syntax|javascript|1159755|然后，在textField委托方法中|1159756|-+(BOOL)textFieldShouldReturn:(UITextField+*)textField+{
++++[textField+resignFirstResponder];
++++return+YES;
}|1159757|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|$]]

Try this,

<pre><code>[textField setDelegate: self];
</code></pre>

Then, in textField delegate method

<pre><code>- (BOOL)textFieldShouldReturn:(UITextField *)textField {
 [textField resignFirstResponder];
 return YES;
}
</code></pre>

blocks|key|1160107|text|定义这个类，然后将你的文本字段设置为使用这个类，当自动按下return键时，整个隐藏键盘就会自动执行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1160108|class+TextFieldWithReturn:+UITextField,+UITextFieldDelegate
{

++++required+init?(coder+aDecoder:+NSCoder)+
++++{
++++++++super.init(coder:+aDecoder)
++++++++self.delegate+=+self
++++}

++++func+textFieldShouldReturn(_+textField:+UITextField)+->+Bool
++++{
++++++++textField.resignFirstResponder()
++++++++return+true
++++}

}|code-block|syntax|javascript|1160109|然后，你需要在故事板中做的就是设置字段来使用这个类：|1160110|​|1160111|📷|atomic|offset|length|1160112|1160113|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/99d052567439a994c718743f86f4e1dd.png|imageAlt^0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|11|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|12|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|13|8|@]|9|@$N|14|O|15|1|16]]|A|$]]|$1|P|3|J|5|6|7|17|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X|Y|-4]]]]

Define this class and then set your text field to use the class and this automates the whole hiding keyboard when return is pressed automatically.

<pre><code>class TextFieldWithReturn: UITextField, UITextFieldDelegate
{

 required init?(coder aDecoder: NSCoder) 
 {
 super.init(coder: aDecoder)
 self.delegate = self
 }

 func textFieldShouldReturn(_ textField: UITextField) -&gt; Bool
 {
 textField.resignFirstResponder()
 return true
 }

}
</code></pre>

Then all you need to do in the storyboard is set the fields to use the class:

<a href="https://i.stack.imgur.com/5pGlN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5pGlN.png" alt="enter image description here"></a>

blocks|key|946016|text|您可以将“主要操作触发”(在UITextField上单击鼠标右键)连接到一个IBAction，然后您可以辞去first+responder+(无需委托)。示例(Swift+4)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|946017|@IBAction+func+textFieldPrimaryAction(_+sender:+UITextField)+{
++++sender.resignFirstResponder()
++++...
}|code-block|syntax|javascript|946018|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 connect "Primary Action Triggered" (right click on UITextField) with an IBAction and you can resign first responder (without delegation). Example
(Swift 4):

<pre><code>@IBAction func textFieldPrimaryAction(_ sender: UITextField) {
 sender.resignFirstResponder()
 ...
}
</code></pre>

blocks|key|1160148|text|如果要隐藏特定键盘的键盘，请使用[self.view+resignFirstResponder];；如果要隐藏任何键盘，请使用[self.view+endEditing:true];|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1160149|entityMap^0|G|X|1R|S|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

If you want to hide the keyboard for a particular keyboard use 
<code>[self.view resignFirstResponder];</code>
If you want to hide any keyboard from view use <code>[self.view endEditing:true];</code>

blocks|key|1159871|text|[textField+resignFirstResponder];|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1159872|使用这个|unstyled|1159873|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>[textField resignFirstResponder];
</code></pre>

Use this

Clicking in a textfield makes the keyboard appear.
How do I hide it when the user presses the return key?

How to hide the keyboard when I press return key in a UITextField?

Swift

在文本字段中单击可显示键盘。当用户按回车键时，我如何隐藏它？

问在UITextField中按回车键时如何隐藏键盘？
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问在UITextField中按回车键时如何隐藏键盘？EN

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问在UITextField中按回车键时如何隐藏键盘？
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