Simple 4 Digit Passcode View for iPhone and iPad to mimic lock screen
Create a PasscodeView and wire up a delegate. Then respond to the callbacks, the only one that is required is
- (BOOL) passcodeView:(PasscodeView*)passcodeView didEnterPasscode:(NSString*)passcode;
The delegate must return YES or NO to provide a pass/fail status to the view
http://www.opensource.org/licenses/mit-license.php