没有完成按钮的 UIKeyboardTypeNumberPad

Question

我们如何实现 UIKeyboardTypeNumberPad 以便它有一个“完成”按钮？默认情况下它没有。

Answer 1

如果我没记错的话，那么您想询问如何为 UIKeyboardTypeNumberPad 的键盘添加自定义“完成”按钮。在这种情况下，这可能会有所帮助。在.h中声明一个 UIButton *doneButton 并将以下代码添加到.m文件中

- (void)addButtonToKeyboard {
    // create custom button
    if (doneButton == nil) {
        doneButton  = [[UIButton alloc] initWithFrame:CGRectMake(0, 163, 106, 53)];
    }
    else {
        [doneButton setHidden:NO];
    }

    [doneButton addTarget:self action:@selector(doneButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
    // locate keyboard view
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
    UIView* keyboard = nil;
    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)doneButtonClicked:(id)Sender {
//Write your code whatever you want to do on done button tap
//Removing keyboard or something else
}

我在我的应用程序中使用相同的代码，因此调整了按钮的框架，因此，每当您需要显示完成按钮时，您都可以调用 [self addButtonToKeyboard ]在键盘上。否则，UIKeyboardTypeNumberPad 没有“完成”按钮。

Answer 2

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


//Call this method 

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


   UIButton *doneButton  = [[UIButton alloc] initWithFrame:CGRectMake(0, 163, 106, 53)];
    doneButton.adjustsImageWhenHighlighted = NO;
    [doneButton setImage:[UIImage imageNamed:@"Done.png"] forState:UIControlStateNormal];
   [doneButton addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
    UIView* keyboard;
    for(int i=0; i<[tempWindow.subviews count]; i++) {
        keyboard = [tempWindow.subviews objectAtIndex:i];

        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];
        }
    }

}

Answer 3

iOS 5 问题已解决。谢谢一百万。

我在显示“完成”按钮时遇到问题。

替换：

 if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)
     [keyboard addSubview:doneButton];

在 iOS 5 中不显示完成按钮...

替换为：

 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];
 }

工作得很好。你是一个明星。谢谢，尼古拉;-)

Answer 4

如果有人遇到这样的问题：当您尝试在同一应用程序中加载其他类型的键盘时，“完成”按钮不断弹出，我知道很多应用程序都存在此问题。
不管怎样，我是这样解决这个问题的：
在您的 ViewController（您添加“完成”按钮的同一视图控制器）中添加此代码（按原样），它应该可以解决“完成”按钮不断重新出现的问题。
希望它对一些人有帮助。

- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2) {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardDidShowNotification object:nil];   
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardDidHideNotification object:nil];

} else {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];  
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

}