async componentWillMount() {
        await Expo.Font.loadAsync({
            Roboto: require('native-base/Fonts/Roboto.ttf'), // eslint-disable-line global-require
            Roboto_medium: require('native-base/Fonts/Roboto_medium.ttf'), // eslint-disable-line global-require
            Ionicons: require('@expo/vector-icons/fonts/Ionicons.ttf'), // eslint-disable-line global-require