almorak

 Version: react-native-cli: 2.0.1 react-native: 0.53.0 How happened 1 install this library. 2 just add import QRCode from 'react-native-qrcode'; to one of screens. 3 refresh the simulator...

"react-native-flip-toggle-button": "^1.0.8", toValue is not defined. solved: 1. constructor(props) { ... let toValue = 0;