Question

我正在尝试向UIKeyboadnumpad添加“完成”按钮，但没有成功。我的代码有什么问题？

键盘没有完成按钮

@implementation DemoViewController

- (void)loadView {
    self.view = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
    self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];

    textField = [[UITextField alloc] initWithFrame:CGRectMake(10, 200, 300, 26)];
    textField.borderStyle = UITextBorderStyleRoundedRect;
    textField.keyboardType = UIKeyboardTypeNumberPad;
    textField.returnKeyType = UIReturnKeyDone;
    textField.textAlignment = UITextAlignmentLeft;
    textField.text = @"12345";
    [self.view addSubview:textField];

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

- (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:@"DoneUp.png"] forState:UIControlStateNormal];
    [doneButton setImage:[UIImage imageNamed:@"DoneDown.png"] forState:UIControlStateHighlighted];
    [doneButton addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];

    // locate keyboard view
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:0];
    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 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2) {
            if([[keyboard description] hasPrefix:@"<UIPeripheralHost"] == YES)
                [keyboard addSubview:doneButton];
        } else {
            if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)
                [keyboard addSubview:doneButton];
        }

    }
}

- (void)doneButton:(id)sender {
    NSLog(@"Input: %@", textField.text);
    [textField resignFirstResponder];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [textField release];
    [super dealloc];
}


@end

Answer 1

另一种解决方案。如果屏幕上还有其他非数字键盘文本字段，则表示完美。

inputAccessoryView

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIToolbar* numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    numberToolbar.barStyle = UIBarStyleBlackTranslucent;
    numberToolbar.items = [NSArray arrayWithObjects:
                         [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelNumberPad)],
                         [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                         [[UIBarButtonItem alloc]initWithTitle:@"Apply" style:UIBarButtonItemStyleDone target:self action:@selector(doneWithNumberPad)],
                     nil];
    [numberToolbar sizeToFit];
    numberTextField.inputAccessoryView = numberToolbar;
}

-(void)cancelNumberPad{
    [numberTextField resignFirstResponder];
    numberTextField.text = @"";
}

-(void)doneWithNumberPad{
    NSString *numberFromTheKeyboard = numberTextField.text;
    [numberTextField resignFirstResponder];
}

我需要手机垫（带+ *＃）而不是数字键盘，我甚至没有角落里的空按钮。

Answer 2

编写添加按钮的代码 - (void)keyboardDidShow:(NSNotification *)note

而不是

- (void)keyboardWillShow:(NSNotification *)note

对于此工具UIKeyboardDidShowNotification通知，例如：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) 
                                                     name:UIKeyboardDidShowNotification object:nil];

我认为UIView* keyboard;没有得到键盘的视图，因为键盘还没有显示，它会显示!!!

Answer 3

有些教程不完整或者年龄较大。本教程从IOS 4.3开始工作，我检查了它。保存两个图像图形，并粘贴代码。几乎无法改变。这是链接。

PS。我与本文没有任何关联，但发现它是完整的。

http://www.neoos.ch/blog/37-uikeyboardtypenumberpad-and-the-missing-return-key

Answer 4

简化：截取屏幕截图，剪切整个退格键，水平翻转，在Photoshop中清除其退格符号，并在返回键上叠加我们想要的文字。我们选择将其标记为完成现在我们有自定义按钮的UIControlStateNormal的图像重复整个过程（在截取屏幕截图时使用触摸的退格键）为我们的按钮UIControlStateHighlighted获取第二个图像。

结果如下：＆lt; 缺少图片＆gt;

现在回到编码：
首先，我们需要知道数字键盘何时在屏幕上向上滑动，以便我们可以在此之前插入自定义按钮。
幸运的是，有一个关于这个目的的通知，并注册它就像：

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

完成整件事后，不要忘记在适当的地方从通知中心删除观察员：

[[NSNotificationCenter defaultCenter] removeObserver:self];

现在我们已经了解它的核心。我们在keyboardWillShow方法中所要做的就是找到键盘视图并添加我们的按钮键盘视图是我们应用程序的第二个UIWindow的一部分，正如其他人已经想到的那样（参见此主题）所以我们引用那个窗口（在大多数情况下它将是第二个窗口，所以下面代码中的objectAtIndex:1很好），遍历它的视图层次结构，直到找到键盘并在左下方添加按钮：

- (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:@"DoneUp.png"]
                forState:UIControlStateNormal];
    [doneButton setImage:[UIImage imageNamed:@"DoneDown.png"]
                forState:UIControlStateHighlighted];
    [doneButton addTarget:self action:@selector(doneButton:)
         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];
    }
}

Voilà，就是这样！我们按钮的空白区域从坐标（0,163）开始，并具有尺寸（106,53）当然，必须编写doneButton方法，但这不再困难。只需确保在正在编辑的文本字段上调用resignFirstResponder以使键盘向下滑动。

我们“完成了”。

尝试将完成按钮添加到数字键盘

4 个答案: