How to add a 'Done' button to numpad keyboard in iOS

Question

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.

First I subscribe to the keyboard showing notification

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

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];
    }
}

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?

Edit: 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).

Answer 1

The much safer approach is to use a UIToolBar with Done Button as inputAccessoryView.

---

Sample Code :

UIToolbar *keyboardDoneButtonView = [[UIToolbar alloc] init];
[keyboardDoneButtonView sizeToFit];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                               style:UIBarButtonItemStyleBordered target:self
                                                              action:@selector(doneClicked:)];
[keyboardDoneButtonView setItems:[NSArray arrayWithObjects:doneButton, nil]];
txtField.inputAccessoryView = keyboardDoneButtonView;

---

Your -doneClicked method should look like this :

- (IBAction)doneClicked:(id)sender
{
    NSLog(@"Done Clicked.");
    [self.view endEditing:YES];
}

Sample Code Swift:

let keyboardDoneButtonView = UIToolbar.init()
keyboardDoneButtonView.sizeToFit()
let doneButton = UIBarButtonItem.init(barButtonSystemItem: UIBarButtonSystemItem.Done, 
                                                   target: self, 
                                                   action: Selector("doneClicked:")))    

keyboardDoneButtonView.items = [doneButton]
textFieldInput.inputAccessoryView = keyboardDoneButtonView

---

Your -doneClicked method should look like this :

func doneClicked(sender: AnyObject) {
  self.view.endEditing(true)
}