trying to add done button to Numeric keyboard

Question

I'm trying to add a "done" button to the UIKeyboadnumpad, but with no success. What's wrong in my code?

the keyboard don't have the done button

@implementation DemoViewController

- (void)loadView {
    self.view = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
    self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];

    textField = [[UITextField alloc] initWithFrame:CGRectMake(10, 200, 300, 26)];
    textField.borderStyle = UITextBorderStyleRoundedRect;
    textField.keyboardType = UIKeyboardTypeNumberPad;
    textField.returnKeyType = UIReturnKeyDone;
    textField.textAlignment = UITextAlignmentLeft;
    textField.text = @"12345";
    [self.view addSubview:textField];

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

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

    // locate keyboard view
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:0];
    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 ([[[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)doneButton:(id)sender {
    NSLog(@"Input: %@", textField.text);
    [textField resignFirstResponder];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [textField release];
    [super dealloc];
}


@end

Answer 1

Another solution. Perfect if there are other non-number pad text fields on the screen.

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIToolbar* numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    numberToolbar.barStyle = UIBarStyleBlackTranslucent;
    numberToolbar.items = [NSArray arrayWithObjects:
                         [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelNumberPad)],
                         [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                         [[UIBarButtonItem alloc]initWithTitle:@"Apply" style:UIBarButtonItemStyleDone target:self action:@selector(doneWithNumberPad)],
                     nil];
    [numberToolbar sizeToFit];
    numberTextField.inputAccessoryView = numberToolbar;
}

-(void)cancelNumberPad{
    [numberTextField resignFirstResponder];
    numberTextField.text = @"";
}

-(void)doneWithNumberPad{
    NSString *numberFromTheKeyboard = numberTextField.text;
    [numberTextField resignFirstResponder];
}

I needed the phone pad (with the +*#) and not the number pad, do I didn't even had the empty button in the corner.

Answer 2

Write your add button's code in - (void)keyboardDidShow:(NSNotification *)note

instead of

- (void)keyboardWillShow:(NSNotification *)note 

For this implement UIKeyboardDidShowNotification notification like :

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

I think UIView* keyboard; is not getting the keyboard's view as keyboard is not displayed yet, it will display !!!

Answer 3

Some of the tutorials are incomplete or are much older. This tutorial works from IOS 4.3 onwards and I checked it. Save the two image graphics, and paste in the code. There is very little to change. Here is the link.

ps. I am not affiliated in any way with this article, but found it to be complete.

http://www.neoos.ch/blog/37-uikeyboardtypenumberpad-and-the-missing-return-key