删除 iphone 普通键盘中的完成按钮答案

【问题标题】：removing done button in normal keypad in iphone删除 iphone 普通键盘中的完成按钮
【发布时间】：2012-01-03 10:18:37
【问题描述】：

我有两个编辑文本一个编辑文本输入应该只接受数字，以便我有显示数字键盘。在数字键盘中没有完成按钮。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，键盘也会显示完成按钮。我想避免在那个特定的编辑文本中完成按钮。@987654322 @ 请指导我如何删除普通键盘中的那个按钮..

【问题讨论】：

标签： iphone objective-c xcode

【解决方案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;
}

【讨论】：

最后只有我在搜索 [[NSNotificationCenter defaultCenter] removeObserver:self];非常感谢prem

【解决方案2】：

您可以使用以下代码将其删除：

注意：您必须将tag 分配给按钮。这里是300

//for remove done button from keyboard
- (void)removeButtonFromKeyboard
{  
        // 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, remove the button
            if([[keyboard description] hasPrefix:@"<UIPeripheralHost"] == YES) 
            {
                [[keyboard viewWithTag:300] removeFromSuperview];
            }
            else
            {
                if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)
                    [[keyboard viewWithTag:300] removeFromSuperview];
            }       
        }
        isButtonAdded = NO ;
    }

编辑

在- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField 中，您可以通过文本字段的标签检查您是否想要完成按钮。喜欢：

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
   if (textField.tag == 1001)
   {
       // add button
       // take a Boolean and make it true in your create button function  
       if(!doneButtonAdded)// if button is not added
      {
         // then add button
      }
   }
   else if (textFiled.tag == 1002) // your normal key board
   {
      if(doneButtonAdded)// if button is added
      {
          // remove button
          // in remove button function make doneButtonAdded to false
      }
   }
}

希望对你有帮助。

【讨论】：