iPhone Force Textbox Input to Upper Case

Question

How do I force characters input into a textbox on the iPhone to upper case?

Answer 1

To Automatically input uppercase in textfield:

Case 1: Add UITextDelegate protocol and implement the following method

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    textField.text = [textField.text stringByReplacingCharactersInRange:range withString:[string capitalizedString]];

    return NO;
}

Case 2:Set the following parameter in the ViewDidLoad() method in your view controller. Although in this case the user can turnoff the caps button on the keyboard.

urTextFieldName.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters;