Is it possible to change UITextInputTraits while a UIKeyboard is in view?

Question

I want to change the UITextInputTraits of a keyboard while it is in use....

My ideal code would look something like this:

- (IBAction)nameTextDidChange:(UITextField *)sender {
    if ([sender.text isEqualToString:@""]) {
        sender.returnKeyType = UIReturnKeyDone;
    } else {
        sender.returnKeyType = UIReturnKeySearch;
    }
}

So... I have a different 'Return' button for an empty string as I do a string with some text in. The code I posted above doesn't work, the keyboard retains it's original text input traits.

Any ideas anyone, or is this never going to work no-matter how hard I try?

Cheers!

Nick.

Thanks to Deepak, this is the code I actually used:

if ([sender.text isEqualToString:@""]) {
    sender.returnKeyType = UIReturnKeyDone;

    [sender resignFirstResponder];
    [sender becomeFirstResponder];
} else if (sender.returnKeyType == UIReturnKeyDone) {

    NSString *cachedLetter = sender.text;

    sender.returnKeyType = UIReturnKeySearch;

    [sender resignFirstResponder];
    [sender becomeFirstResponder];

    sender.text = cachedLetter;
}

Answer 1

You can make this work by adding the following lines at the end of the method.

if ([textField.text isEqualToString:@""]) {
    textField.returnKeyType = UIReturnKeyDone;

    [textField resignFirstResponder];
    [textField becomeFirstResponder];
} else if (textField.returnKeyType == UIReturnKeyDone) {
    textField.returnKeyType = UIReturnKeySearch;

    [textField resignFirstResponder];
    [textField becomeFirstResponder];
}

This should work.

You basically flip it on and off so that the text input changes. The second if is to make sure you flip only if needed.