如何在 iOS 的数字键盘上添加“完成”按钮

Question

所以，小键盘键盘默认没有“完成”或“下一步”按钮，所以我想添加一个。在 iOS 6 及更低版本中，有一些技巧可以在键盘上添加按钮，但它们似乎不适用于 iOS 7。

首先我订阅了显示通知的键盘

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillShow:)
                                             name:UIKeyboardWillShowNotification
                                           object:nil];

然后我尝试在键盘出现时添加一个按钮：

- (void)keyboardWillShow:(NSNotification *)note 
{
    // create custom button
    UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeSystem];
    doneButton.frame = CGRectMake(0, 50, 106, 53);
    doneButton.adjustsImageWhenHighlighted = NO;
    [doneButton setTitle:@"Done" forState:UIControlStateNormal];
    [doneButton addTarget:self action:@selector(dismissKeyboard) forControlEvents:UIControlEventTouchUpInside];

    // locate keyboard view
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
    UIView* keyboard;
    for(int i=0; i<[tempWindow.subviews count]; i++) 
    {
        keyboard = [tempWindow.subviews objectAtIndex:i];
        // keyboard view found; add the custom button to it
        if([[keyboard description] hasPrefix:@"UIKeyboard"] == YES)
        [keyboard addSubview:doneButton];
    }
}

但是 for 循环没有运行，因为它没有找到任何子视图。有什么建议？我找不到任何适用于 iOS7 的解决方案，所以我应该以不同的方式执行此操作吗？

编辑：感谢工具栏人员的所有建议，但我宁愿不走那条路，因为我的空间很差（而且有点难看）。

Answer 1

更安全的方法是使用UIToolBar 和Done 按钮作为inputAccessoryView。

---

示例代码：

UIToolbar *keyboardDoneButtonView = [[UIToolbar alloc] init];
[keyboardDoneButtonView sizeToFit];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                               style:UIBarButtonItemStyleBordered target:self
                                                              action:@selector(doneClicked:)];
[keyboardDoneButtonView setItems:[NSArray arrayWithObjects:doneButton, nil]];
txtField.inputAccessoryView = keyboardDoneButtonView;

---

您的 -doneClicked 方法应该如下所示：

- (IBAction)doneClicked:(id)sender
{
    NSLog(@"Done Clicked.");
    [self.view endEditing:YES];
}

Swift 示例代码：

let keyboardDoneButtonView = UIToolbar.init()
keyboardDoneButtonView.sizeToFit()
let doneButton = UIBarButtonItem.init(barButtonSystemItem: UIBarButtonSystemItem.Done, 
                                                   target: self, 
                                                   action: Selector("doneClicked:")))    

keyboardDoneButtonView.items = [doneButton]
textFieldInput.inputAccessoryView = keyboardDoneButtonView

---

您的 -doneClicked 方法应该如下所示：

func doneClicked(sender: AnyObject) {
  self.view.endEditing(true)
}

Answer 2

更简单的方法：

Swift 3.0 及以上版本：

func addDoneButton() {
    let keyboardToolbar = UIToolbar()
    keyboardToolbar.sizeToFit()
    let flexBarButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace,
        target: nil, action: nil)
    let doneBarButton = UIBarButtonItem(barButtonSystemItem: .done,
        target: view, action: #selector(UIView.endEditing(_:)))
    keyboardToolbar.items = [flexBarButton, doneBarButton]
    textField.inputAccessoryView = keyboardToolbar
}

Swift 2.3 及更低版本：

func addDoneButton() {
    let keyboardToolbar = UIToolbar()
    keyboardToolbar.sizeToFit()
    let flexBarButton = UIBarButtonItem(barButtonSystemItem: .FlexibleSpace,
        target: nil, action: nil)
    let doneBarButton = UIBarButtonItem(barButtonSystemItem: .Done,
        target: view, action: #selector(UIView.endEditing(_:)))
    keyboardToolbar.items = [flexBarButton, doneBarButton]
    textField.inputAccessoryView = keyboardToolbar
}

目标 C：

- (void)addDoneButton {
    UIToolbar* keyboardToolbar = [[UIToolbar alloc] init];
    [keyboardToolbar sizeToFit];
    UIBarButtonItem *flexBarButton = [[UIBarButtonItem alloc]
    initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
    target:nil action:nil];
    UIBarButtonItem *doneBarButton = [[UIBarButtonItem alloc]
    initWithBarButtonSystemItem:UIBarButtonSystemItemDone
    target:self.view action:@selector(endEditing:)];
    keyboardToolbar.items = @[flexBarButton, doneBarButton];
    self.textField.inputAccessoryView = keyboardToolbar;
}

---

编辑：

我创建了一个名为DCKit 的有用库，它已经拥有开箱即用的工具栏：

它还有许多其他很酷的功能。

Answer 3

这是在 iOS7 数字键盘中投射完成按钮的简单方法。在下面 UITextField 的委托方法中，添加键盘显示的通知。

-(void)textFieldDidBeginEditing:(UITextField *)textField {
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];
}

现在实现方法keyboardWillShow，如下所示。这里我们需要对iOS7格外小心。

- (void)keyboardWillShow:(NSNotification *)note {
    // create custom button
    UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
    doneButton.frame = CGRectMake(0, 163, 106, 53);
    doneButton.adjustsImageWhenHighlighted = NO;
    [doneButton setImage:[UIImage imageNamed:@"doneButtonNormal.png"] forState:UIControlStateNormal];
    [doneButton setImage:[UIImage imageNamed:@"doneButtonPressed.png"] forState:UIControlStateHighlighted];
    [doneButton addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];
    
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
        dispatch_async(dispatch_get_main_queue(), ^{
            UIView *keyboardView = [[[[[UIApplication sharedApplication] windows] lastObject] subviews] firstObject];
            [doneButton setFrame:CGRectMake(0, keyboardView.frame.size.height - 53, 106, 53)];
            [keyboardView addSubview:doneButton];
            [keyboardView bringSubviewToFront:doneButton];
            
            [UIView animateWithDuration:[[note.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue]-.02
                                  delay:.0
                                options:[[note.userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue]
                             animations:^{
                                 self.view.frame = CGRectOffset(self.view.frame, 0, 0);
                             } completion:nil];
        });
    } else {
        // locate keyboard view
        dispatch_async(dispatch_get_main_queue(), ^{
            UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
            UIView* keyboard;
            for(int i=0; i<[tempWindow.subviews count]; i++) {
                keyboard = [tempWindow.subviews objectAtIndex:i];
                // keyboard view found; add the custom button to it
                if([[keyboard description] hasPrefix:@"UIKeyboard"] == YES)
                    [keyboard addSubview:doneButton];
            }
        });
    }
}

现在将此宏添加到合适的标头以检测 SYSTEM_VERSION

#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

Answer 4

因为我必须翻译它，所以只是在上面的答案上使用 Swift 版本：

@IBOutlet weak var numberTextField: UITextField!

override func viewDidLoad() {
    addDoneButtonTo(numberTextField)
}

// MARK: Done for numberTextField

private func addDoneButtonTo(textField: UITextField) {
    let flexBarButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
    let doneBarButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Done, target: self, action: "didTapDone:")
    let keyboardToolbar = UIToolbar()
    keyboardToolbar.sizeToFit()
    keyboardToolbar.items = [flexBarButton, doneBarButton]
    textField.inputAccessoryView = keyboardToolbar
}

func didTapDone(sender: AnyObject?) {
    numberTextField.endEditing(true)
}

Answer 5

您可以在键盘的输入附件视图中添加一个按钮

myTextField.inputAccessoryView =_inputView;

输入附件视图是一个始终出现在键盘上并使用[textfield resignFirstResponder] 关闭的视图

将 done 放在输入视图上并执行文本字段的 resign first responder。

Answer 6

1. 将控制器注册到通知中

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    // Keyboard events
    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillShow:)
                                             name:UIKeyboardWillShowNotification
                                           object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillHide:)
                                             name:UIKeyboardWillHideNotification
                                           object:nil];
}

1. 别忘了从通知中心移除控制器

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [self.view endEditing:YES];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

1. 实现键盘通知处理程序

- (void)keyboardWillShow:(NSNotification *)notification {

    // create custom button
    UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
    doneButton.frame = CGRectMake(0, 107, 106, 53);
    [doneButton setTitle:@"Done" forState:UIControlStateNormal];
    [doneButton addTarget:self  action:@selector(doneButton:)forControlEvents:UIControlEventTouchUpInside];
 
   // save the reference to the button in order to use it in keyboardWillHide method
   self.donekeyBoardBtn = doneButton;

   // to my mind no need to search for subviews
   UIWindow *windowContainigKeyboard = [[[UIApplication sharedApplication] windows]  lastObject];
   [windowContainigKeyboard addSubview:self.donekeyBoardBtn];
   self.donekeyBoardBtn.frame = CGRectMake(0., CGRectGetHeight(w.frame) -  CGRectGetHeight(self.donekeyBoardBtn.frame), CGRectGetWidth(self.donekeyBoardBtn.frame), CGRectGetHeight(self.donekeyBoardBtn.frame));
}

- (void)keyboardWillHide:(NSNotification *)notification {

    [self.donekeyBoardBtn removeFromSuperview];
}

4. 实现完成按钮操作

- (void)doneButton:(id)sender {
    // add needed implementation
    [self.view endEditing:YES]; 
}

Answer 7

随便用

yourTextField.inputAccessoryView

希望你能帮忙

Answer 8

您确实需要检测您使用的是手机还是 iPad，因为 iPad 在“数字”键盘上实现了返回键

Answer 9

键盘视图可以找到hasPrefix:@"UIKeyboard"，按钮不能作为子视图添加。这是我的解决方案：enter link description here