如何在iOS中向numpad键盘添加“完成”按钮

问题描述

所以，数字键盘默认没有完成或下一步按钮，所以我想添加一个。在iOS 6及以下版本中，有一些技巧可以在键盘上添加一个按钮，但它们似乎在iOS 7中不起作用。

So, the numpad keyboard doesn't come with a 'Done' or 'Next' button by default so I'd like to add one. In iOS 6 and below there were some tricks to add a button to the keyboard but they don't seem to be working in iOS 7.

首先我订阅了键盘显示通知

First I subscribe to the keyboard showing notification

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

然后我尝试在键盘显示时添加一个按钮：

Then I try to add a button when the keyboard shows up:

- (void)keyboardWillShow:(NSNotification *)note
{
    // create custom button
    UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeSystem];
    doneButton.frame = CGRectMake(0, 50, 106, 53);
    doneButton.adjustsImageWhenHighlighted = NO;
    [doneButton setTitle:@"Done" forState:UIControlStateNormal];
    [doneButton addTarget:self action:@selector(dismissKeyboard) 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];
    }
}

但是for循环不会运行，找不到任何子视图。有什么建议么？我找不到任何解决方案iOS7，所以有一个不同的方式，我应该这样做？

But the for loop doesn't run because it doesn't find any subviews. Any suggestions? I couldn't find any solutions for iOS7 so is there a different way I'm supposed to be doing this?

编辑：感谢所有的建议工具栏家伙，但

Thanks for all the suggestions for toolbars guys but I'd rather not go down that route as I'm quite space poor (and it is kind of ugly).

推荐答案

我不想走这条路线，因为我的空间很差这是一种在iOS7 num-keypad中投影完成按钮的简单方法。在下面的UITextField的委托方法中，添加一个通知键盘显示。

This is a simple way of projecting a done button in iOS7 num-keypad. In the below delegate method of UITextField, add a notification for keyboard show.

-(void)textFieldDidBeginEditing:(UITextField *)textField {

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

现在实现方法 keyboardWillShow 如下。这里我们需要对iOS7格外小心。

Now implement the method keyboardWillShow as below. Here we need to take extra care for iOS7.

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

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
    dispatch_async(dispatch_get_main_queue(), ^{
        UIView *keyboardView = [[[[[UIApplication sharedApplication] windows] lastObject] subviews] firstObject];
        [doneButton setFrame:CGRectMake(0, keyboardView.frame.size.height - 53, 106, 53)];
        [keyboardView addSubview:doneButton];
        [keyboardView bringSubviewToFront:doneButton];

        [UIView animateWithDuration:[[note.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue]-.02
                              delay:.0
                            options:[[note.userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue]
                         animations:^{
                             self.view.frame = CGRectOffset(self.view.frame, 0, 0);
                         } completion:nil];
    });
}else {
    // locate keyboard view
    dispatch_async(dispatch_get_main_queue(), ^{
        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];
        }
    });
  }
}

现在将此宏添加到合适的标题以检测SYSTEM_VERSION

Now add this macro to suitable header to detect the SYSTEM_VERSION

#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO（v）（[[[UIDevice currentDevice] systemVersion] compare：v options：NSNumericSearch]！= NSOrderedAscending）

这篇关于如何在iOS中向numpad键盘添加“完成”按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！