ios 如何使iPhone上的返回键使键盘消失？

How to make return key on iPhone make keyboard disappear?

提问by K.Honda

I have two UITextFields(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?

我有两个UITextFields（例如用户名和密码），但是按键盘上的返回键时我无法摆脱键盘。我怎样才能做到这一点？

回答by Sid

First you need to conform to the UITextFieldDelegateProtocol in your View/ViewController's header file like this:

首先，您需要UITextFieldDelegate在 View/ViewController 的头文件中遵守协议，如下所示：

@interface YourViewController : UIViewController <UITextFieldDelegate>

Then in your .m file you need to implement the following UITextFieldDelegateprotocol method:

然后在您的 .m 文件中，您需要实现以下UITextFieldDelegate协议方法：

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];

    return YES;
}

[textField resignFirstResponder];makes sure the keyboard is dismissed.

[textField resignFirstResponder];确保关闭键盘。

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

在 .m 中初始化文本字段后，确保将视图/视图控制器设置为 UITextField 的委托：

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

回答by Nick Weaver

Implement the UITextFieldDelegate method like this:

像这样实现 UITextFieldDelegate 方法：

- (BOOL)textFieldShouldReturn:(UITextField *)aTextField
{
    [aTextField resignFirstResponder];
    return YES;
}

回答by Caleb

See Managing the Keyboardfor a complete discussion on this topic.

有关此主题的完整讨论，请参阅管理键盘。

回答by cschwarz

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

你的 UITextFields 应该有一个委托对象 (UITextFieldDelegate)。在您的委托中使用以下代码使键盘消失：

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
}

Should work so far...

到目前为止应该工作......

回答by Ema

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

花了我几次试验，遇到了同样的问题，这对我有用：

Check your spelling at -

检查您的拼写 -

(BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];

I corrected mine at textFieldinstead of textfield, capitalise "F"... and bingo!! it worked..

我更正了我的textField而不是textfield，大写“F”......和宾果游戏！！有效..

回答by Conor Taylor

When the return key is pressed, call:

当按下回车键时，调用：

[uitextfield resignFirstResponder];

回答by Ali Kahoot

Add this instead of the pre-defined class

添加这个而不是预定义的类

class ViewController: UIViewController, UITextFieldDelegate {

To remove keyboard when clicked outside the keyboard

在键盘外单击时移除键盘

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        self.view.endEditing(true)
    }

and to remove keyboard when pressed enter

并在按下 Enter 键时移除键盘

add this line in viewDidLoad()

在 viewDidLoad() 中添加这一行

inputField is the name of the textField used.

inputField 是使用的 textField 的名称。

self.inputField.delegate = self

and add this function

并添加此功能

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

回答by user2904476

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

经过相当长的时间寻找有意义的东西后，这就是我放在一起的东西，它就像一个魅力。

.h

。H

//
//  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

.m

.m

//
//  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

Hope this helps!

希望这可以帮助！

回答by Avinash651

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:

将 UITextField 的 Delegate 设置为您的 ViewController，在 File's Owner 和 UITextField 之间添加一个引用插座，然后实现此方法：

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

回答by Mojtabye

Swift 2 :

斯威夫特2：

this is what is did to do every thing !

这就是所做的每一件事！

close keyboard with Donebutton or Touch outSide,Nextfor go to next input.

用Done按钮 或关闭键盘Touch outSide，Next转到下一个输入。

First Change TextFiled Return KeyTo Nextin StoryBoard.

首先在 StoryBoard 中将TextFiled 更改Return Key为Next。

override func viewDidLoad() {
  txtBillIdentifier.delegate = self
  txtBillIdentifier.tag = 1
  txtPayIdentifier.delegate  = self
  txtPayIdentifier.tag  = 2

  let tap = UITapGestureRecognizer(target: self, action: "onTouchGesture")
  self.view.addGestureRecognizer(tap)

}

func textFieldShouldReturn(textField: UITextField) -> Bool {
   if(textField.returnKeyType == UIReturnKeyType.Default) {
       if let next = textField.superview?.viewWithTag(textField.tag+1) as? UITextField {
           next.becomeFirstResponder()
           return false
       }
   }
   textField.resignFirstResponder()
   return false
}

func onTouchGesture(){
    self.view.endEditing(true)
}