Loading font native-base error

Question

I'm getting the error: You started loading 'Roboto_medium', but used it before it finished loading when using native base.

I've followed the instructions in the official page.

To create react native app I'm using create-react-native-app.

App.js

export default class App extends React.Component {

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

 render() {
   return (
    <Container>
      <StatusBar hidden={true} />

    <Button>
      <Text>
        Button
      </Text>
    </Button>

    <ListaItens />
    </Container>
  );
}
} 

Answer 1

you need to wait till the fonts get loaded. You can do something like this

import React from "react";
import { StatusBar } from "react-native";
import { Container, Button, text, ListItem, Text } from "native-base";
import Expo from "expo";

export default class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = { loading: true };
  }

  async componentWillMount() {
    await Expo.Font.loadAsync({
      Roboto: require("native-base/Fonts/Roboto.ttf"),
      Roboto_medium: require("native-base/Fonts/Roboto_medium.ttf"),
      Ionicons: require("@expo/vector-icons/fonts/Ionicons.ttf"),
    });
    this.setState({ loading: false });
  }

  render() {
    if (this.state.loading) {
      return <Expo.AppLoading />;
    }
    return (
      <Container>
        <StatusBar hidden={true} />

        <Button>
          <Text>Button</Text>
        </Button>

        <ListItem />
      </Container>
    );
  }
}