iphone - 删除 iPhone 普通键盘中的完成按钮

Question

我有两个编辑文本，一个编辑文本输入应该只接受数字，以便我显示数字键盘。数字键盘上没有完成按钮。所以现在我添加完成按钮 using this link现在“完成”按钮工作正常。我的问题是我的另一个编辑文本是普通键盘，键盘也将显示“完成”按钮。我想避免在该特定编辑文本中使用“完成”按钮。 请指导我如何删除普通键盘中的该按钮..

Answer 1

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2)
{
      [[NSNotificationCenter defaultCenter] addObserver:self    
                                               selector:@selector(keyboardDidShow:)
                                                   name:UIKeyboardDidShowNotification 
                                                 object:nil];
}
else
{
      [[NSNotificationCenter defaultCenter] addObserver:self 
                                               selector:@selector(keyboardWillShow:) 
                                                   name:UIKeyboardWillShowNotification 
                                                 object:nil];
}

- (void)addButtonToKeyboard
{
    // create custom button

    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:@"Btn-DoneDown-2.png"] forState:UIControlStateNormal];
        [doneButton setImage:[UIImage imageNamed:@"Btn-DoneUp-2.png"] forState:UIControlStateHighlighted];
    } 
    else
    {        
        [doneButton setImage:[UIImage imageNamed:@"Btn-DoneDown-1.png"] forState:UIControlStateNormal];
        [doneButton setImage:[UIImage imageNamed:@"Btn-DoneUp-1.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 ([[[UIDevice currentDevice] systemVersion] floatValue] < 3.2) 
    {
        [self addButtonToKeyboard];
    }
}

- (void)keyboardDidShow:(NSNotification *)note 
{
    if(doneButton)
    {
        [doneButton removeFromSuperview];
        doneButton = nil;
    }
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2) 
    {
        [self addButtonToKeyboard];
    }
}

- (void)doneButton:(id)sender 
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [doneButton removeFromSuperview];
    doneButton = nil;
}