requiring image in react-native 0.14.2

Question

Doing this my code works fine

<Image
source={require('../../assets/images/music_star.png')}
style={styles.musicStar}
/>

But doing this gives me an error

let imgSource = '../../assets/images/music_star.png';
<Image
source={require(imgSource)}
style={styles.musicStar}
/>

I get an error:

Requiring unknown module "../../assets/images/music_star.png"

What am I doing wrong? How to require images stored in a variable in react-native 0.14.2?

Answer 1

You can read more in the docs but basically, in order for this to work, the image name in require has to be known statically:

// GOOD
<Image source={require('./my-icon.png')} />

// BAD
var icon = this.props.active ? 'my-icon-active' : 'my-icon-inactive';
<Image source={require('./' + icon + '.png')} />

// GOOD
var icon = this.props.active ? require('./my-icon-active.png') : require('./my-icon-inactive.png');

To pass an image from parent to child, you should require it in the parent:

/**
 * The entry point for the iOS app.
 */
import React, {
  AppRegistry,
  Component,
  Image,
  View,
} from 'react-native';

class Child extends Component {
  render() {
    return (
      <Image source={this.props.image} />
    )
  }
}

export default class Parent extends Component {
  render() {
    return (
      <View>
        <Child image={require('./test.png')} />
      </View>
    );
  }
}

AppRegistry.registerComponent('App', () => Parent);