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

The simplest way would be to , implement the editing changed method of the text field and set the textfield's text value to upper case representation of the entered text

- (IBAction)TextFieldEditingChanged:(id)sender
{
    _yourTextField.text = [_yourTextField.text uppercaseString];
}