- (void)keyInputField:(NJKeyInputField *)keyInput
didChangeKey:(CGKeyCode)keyCode;
- (void)keyInputFieldDidClear:(NJKeyInputField *)keyInput;
- (void)keyInputField:(NJKeyInputField *)keyInput
didChangeKey:(CGKeyCode)keyCode;
- (void)keyInputFieldDidClear:(NJKeyInputField *)keyInput;