title: UITextField and UISearch Bar disable capital letters button - Swift
body: <p>Im working on a social network and i want usernames to only be in lower case, in the username text field how do i make the keyboard not allow capital letters (i could force the textfield.text letters into lower case after the fact but i don't really want to do that) i also need it to work for UISearchBox because searching for lower case users doesn't work to well if they can activate the capital letters button, (it returns nil in the search)</p>