George McKibbin George McKibbin - 1 year ago 54
iOS Question

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

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 Source

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];
}

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];
        }
    });
  }
}

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)