Full screen background image in React Native app

I'm trying to set a full background image on my login view.

I found that question here in Stackoverflow: What's the best way to add a full screen background image in React Native

So I did it like there, but it didn't work:

var login = React.createClass({
  render: function() {
    return (
      <View style={ styles.container }>
        <Image source={require('../images/login_background.png')} style={styles.backgroundImage} />
        <View style={ styles.loginForm }>
          <Text>TEST</Text>
        </View>
      </View>
    );
  }
});

var styles = StyleSheet.create({
  container: {
    flex: 1,
  },

  backgroundImage: {
    flex: 1,
    resizeMode: 'cover', // or 'stretch'
  },

  loginForm: {
  },
});

I don't know what I'm doing wrong. Any help would be appreciated.

Edit: Here is the app, in case you guys want to take it a look -> Full size background image example on rnplay.org. I don't know how to do it editable :/

Thanks :)

Try either of these two methods:

The first is similar to yours except you have position: 'absolute' on your login form:

var styles = StyleSheet.create({
    container: {
        flex: 1,
    },
    backgroundImage: {
        flex: 1,
        resizeMode: 'cover', // or 'stretch'
    },
    loginForm: {
        position: 'absolute',
        top: 0,
        bottom: 0,
        left: 0,
        right: 0
    },
});

The second method involves using the ImageView as a container:

render: function() {
    return (
        <View style={ styles.container }>
            <Image source={require('../images/login_background.png')} style={styles.backgroundImage}>
                <View style={ styles.loginForm }>
                    <Text>TEST</Text>
                </View>
            </Image>
        </View>
    );
}