如何隐藏数字小键盘？

Question

我有一个文本字段，我需要用户只键入数值。我正在使用数字键盘类型。在这个键盘上没有完成按钮。我看到一篇文章here 这让我可以在键盘上添加一个完成按钮。

但是，我无法掩饰这一点。这是我的代码

- (void)addButtonToKeyboard {
    // create custom button
    UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
    doneButton.frame = CGRectMake(0, 163, 106, 53);
    doneButton.adjustsImageWhenHighlighted = NO;
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.0) {
        [doneButton setImage:[UIImage imageNamed:@"DoneUp3.png"] forState:UIControlStateNormal];
        [doneButton setImage:[UIImage imageNamed:@"DoneDown3.png"] forState:UIControlStateHighlighted];
    } else {        
        [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 found, add the button
        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)keyboardWillShow:(NSNotification *)note {
    // if clause is just an additional precaution, you could also dismiss it
    if ([[[UIDevice currentDevice] systemVersion] floatValue] < 3.2) {
        [self addButtonToKeyboard];
    }
}

- (void)keyboardDidShow:(NSNotification *)note {
    // if clause is just an additional precaution, you could also dismiss it
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2) {
        [self addButtonToKeyboard];
    }
}
    - (void)doneButton:(id)sender {
        NSLog(@"doneButton");
       [anualIncome setText:@"hai"];
        NSLog(@"Input: %@", anualIncome.text);
        [anualIncome resignFirstResponder];

    }

请指导我在哪里做错了。当我按下完成按钮时，我可以看到这样的控制台输出

Hello World[2542:f803] doneButton
Hello World[2542:f803] Input: (null)

我只是将我的收入添加到我的veiwconroller中。是否应该添加其他任何操作？这是我的出口

@property(nonatomic, retain) IBOutlet UITextField *anualIncome;

Answer 1

您可以使用inputAccessoryView实例的UITextField属性设置UIToolbar上的任何按钮。 （实际上它可以是任何UIView子类）当您在任何Web表单中填充一些文本时，生成的视图将与Safari中的一样。这更容易。如果苹果改变他们的实施，也没有机会打破观点...

快乐的编码......

Answer 2

不使用完成按钮，您可以这样隐藏键盘：

在viewContoller类中实现touches begin方法，如下所示：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [anualIncome resignFirstResponder];
}