blocks|key|882279|text|按下return键后，调用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882280|[uitextfield+resignFirstResponder];|code-block|syntax|javascript|882281|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|$]]

When the return key is pressed, call:

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

blocks|key|882563|text|如下所示实现UITextFieldDelegate方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882564|-+(BOOL)textFieldShouldReturn:(UITextField+*)aTextField
{
++++[aTextField+resignFirstResponder];
++++return+YES;
}|code-block|syntax|javascript|882565|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|$]]

Implement the UITextFieldDelegate method like this:

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

blocks|key|882646|text|首先，您需要在视图/视图控制器的头文件中遵循UITextFieldDelegate协议，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|882647|@interface+YourViewController+:+UIViewController+<UITextFieldDelegate>|code-block|syntax|javascript|882648|然后在您的.m文件中，您需要实现以下UITextFieldDelegate协议方法：|882649|-+(BOOL)textFieldShouldReturn:(UITextField+*)textField
{
++++[textField+resignFirstResponder];

++++return+YES;
}|882650|[textField+resignFirstResponder];确保键盘被关闭。|882651|确保在.m中初始化文本字段后，将视图/视图控制器设置为UITextField的委托：|882652|yourTextField+=+[[UITextField+alloc]+initWithFrame:yourFrame];
//....
//....
//Setting+the+textField's+properties
//....++++
//The+next+line+is+important!!
yourTextField.delegate+=+self;+//self+references+the+viewcontroller+or+view+your+textField+is+on|882653|entityMap^0|M|J|0|0|I|J|0|0|0|X|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|17|8|@]|D|@]|E|$]]|$1|S|3|T|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|U|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|V|$]]

First you need to conform to the <code>UITextFieldDelegate</code> Protocol in your View/ViewController's header file like this:

<pre><code>@interface YourViewController : UIViewController &lt;UITextFieldDelegate&gt;
</code></pre>

Then in your .m file you need to implement the following <code>UITextFieldDelegate</code> protocol method:

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

 return YES;
}
</code></pre>

<code>[textField resignFirstResponder];</code> makes sure the keyboard is dismissed.

Make sure you're setting your view/viewcontroller to be the UITextField's delegate after you init the textfield in the .m:

<pre><code>yourTextField = [[UITextField alloc] initWithFrame:yourFrame];
//....
//....
//Setting the textField's properties
//.... 
//The next line is important!!
yourTextField.delegate = self; //self references the viewcontroller or view your textField is on
</code></pre>

blocks|key|665463|text|有关此主题的完整讨论，请参阅Managing+the+Keyboard。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|665464|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/#documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html^0|E|L|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

See <a href="http://developer.apple.com/library/ios/#documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html" rel="noreferrer">Managing the Keyboard</a> for a complete discussion on this topic.

blocks|key|882751|text|您的UITextFields应该有一个委托对象(UITextFieldDelegate)。在委托中使用以下代码使键盘消失：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882752|-+(BOOL)textFieldShouldReturn:(UITextField+*)textField+{
++++[textField+resignFirstResponder];
}|code-block|syntax|javascript|882753|到目前为止应该是有效的..。|882754|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Your UITextFields should have a delegate object (UITextFieldDelegate). Use the following code in your delegate to make the keyboard disappear:

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

Should work so far...

blocks|key|665613|text|我做了几次试验，也遇到了同样的问题，这对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|665614|检查你的拼写-|665615|(BOOL)textFieldShouldReturn:(UITextField+*)textField+{
++++[textField+resignFirstResponder];|code-block|syntax|javascript|665616|我在textField而不是textfield纠正了我的错误，大写"F"...答对了！它成功了..。|offset|length|style|CODE|665617|entityMap^0|0|0|0|2|9|E|9|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]|$K|W|L|X|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

Took me couple trials, had same issue, this worked for me:

Check your spelling at - 

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

I corrected mine at <code>textField</code> instead of <code>textfield</code>, capitalise "F"... and bingo!! it worked..

blocks|key|882870|text|您可以将IBAction添加到uiTextField(+releation事件是"Did+End+On+Exit")，并且IBAction可以命名为hideKeyboard。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882871|-(IBAction)hideKeyboard:(id)sender
{
++++[uitextfield+resignFirstResponder];
}|code-block|syntax|javascript|882872|此外，您还可以将其应用于其他textFields或按钮，例如，当您单击隐藏按钮以隐藏键盘时，可以将其添加到视图中。|882873|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can add an IBAction to the uiTextField(the releation event is "Did End On Exit"),and the IBAction may named hideKeyboard,

<pre><code>-(IBAction)hideKeyboard:(id)sender
{
 [uitextfield resignFirstResponder];
}
</code></pre>

also,you can apply it to the other textFields or buttons,for example,you may add a hidden button to the view,when you click it to hide the keyboard.

blocks|key|882929|text|经过相当长的时间寻找一些有意义的东西，这是我放在一起的，它就像一个护身符。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882930|.h|882931|//
//++ViewController.h
//++demoKeyboardScrolling
//
//++Created+by+Chris+Cantley+on+11/14/13.
//++Copyright+(c)+2013+Chris+Cantley.+All+rights+reserved.
//

#import+<UIKit/UIKit.h>

@interface+ViewController+:+UIViewController+<UITextFieldDelegate>

//+Connect+your+text+field+to+this+the+below+property.
@property+(weak,+nonatomic)+IBOutlet+UITextField+*theTextField;

@end|code-block|syntax|javascript|882932|.m|882933|//
//++ViewController.m
//++demoKeyboardScrolling
//
//++Created+by+Chris+Cantley+on+11/14/13.
//++Copyright+(c)+2013+Chris+Cantley.+All+rights+reserved.
//

#import+"ViewController.h"

@interface+ViewController+()

@end

@implementation+ViewController



-+(void)viewDidLoad
{
++++[super+viewDidLoad];
++++//+_theTextField+is+the+name+of+the+parameter+designated+in+the+.h+file.+
++++_theTextField.returnKeyType+=+UIReturnKeyDone;
++++[_theTextField+setDelegate:self];

}

//+This+part+is+more+dynamic+as+it+closes+the+keyboard+regardless+of+what+text+field+
//+is+being+used+when+pressing+return.++
//+You+might+want+to+control+every+single+text+field+separately+but+that+isn't+
//+what+this+code+do.
-(void)textFieldShouldReturn:(UITextField+*)textField
{
++++[textField+resignFirstResponder];
}


@end|882934|希望这能有所帮助！|882935|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

After quite a bit of time hunting down something that makes sense, this is what I put together and it worked like a charm.

.h

<pre><code>//
// ViewController.h
// demoKeyboardScrolling
//
// Created by Chris Cantley on 11/14/13.
// Copyright (c) 2013 Chris Cantley. All rights reserved.
//

#import &lt;UIKit/UIKit.h&gt;

@interface ViewController : UIViewController &lt;UITextFieldDelegate&gt;

// Connect your text field to this the below property.
@property (weak, nonatomic) IBOutlet UITextField *theTextField;

@end
</code></pre>

.m

<pre><code>//
// ViewController.m
// demoKeyboardScrolling
//
// Created by Chris Cantley on 11/14/13.
// Copyright (c) 2013 Chris Cantley. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController



- (void)viewDidLoad
{
 [super viewDidLoad];
 // _theTextField is the name of the parameter designated in the .h file. 
 _theTextField.returnKeyType = UIReturnKeyDone;
 [_theTextField setDelegate:self];

}

// This part is more dynamic as it closes the keyboard regardless of what text field 
// is being used when pressing return. 
// You might want to control every single text field separately but that isn't 
// what this code do.
-(void)textFieldShouldReturn:(UITextField *)textField
{
 [textField resignFirstResponder];
}


@end
</code></pre>

Hope this helps!

blocks|key|882983|text|将UITextField的委派设置为您的ViewController，在文件的所有者和UITextField之间添加一个引用出口，然后实现此方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|882984|-(BOOL)textFieldShouldReturn:(UITextField+*)textField+
{
+++if+(textField+==+yourTextField)+
+++{
++++++[textField+resignFirstResponder];+
+++}
+++return+NO;
}|code-block|syntax|javascript|882985|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|$]]

Set the Delegate of the UITextField to your ViewController, add a referencing outlet between the File's Owner and the UITextField, then implement this method:

<pre><code>-(BOOL)textFieldShouldReturn:(UITextField *)textField 
{
 if (textField == yourTextField) 
 {
 [textField resignFirstResponder]; 
 }
 return NO;
}
</code></pre>

blocks|key|665819|text|您可以尝试这个UITextfield子类，它可以为文本设置一个条件以动态更改UIReturnKey：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|665820|https://github.com/codeinteractiveapps/OBReturnKeyTextField|offset|length|665821|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1N|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

You can try this UITextfield subclass which you can set a condition for the text to dynamically change the UIReturnKey: 
<a href="https://github.com/codeinteractiveapps/OBReturnKeyTextField" rel="nofollow">https://github.com/codeinteractiveapps/OBReturnKeyTextField</a>

blocks|key|665854|text|如果要在警告框文本文件上写入时消失键盘|type|unstyled|depth|inlineStyleRanges|entityRanges|data|665855|[[alertController.textFields+objectAtIndex:1]+resignFirstResponder];|code-block|syntax|javascript|665856|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|$]]

If you want to disappear keyboard when writing on alert box textfileds 

<pre><code>[[alertController.textFields objectAtIndex:1] resignFirstResponder];
</code></pre>

I have two <code>UITextFields</code> (e.g. username and password) but I cannot get rid of the keyboard when pressing the return key on the keyboard. How can I do this?

How to make return key on iPhone make keyboard disappear?

我有两个UITextFields (例如用户名和密码)，但按键盘上的return键时无法摆脱键盘。我该怎么做呢？

问如何让iPhone上的return键让键盘消失？
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