loading.js

render() {
    if (this.state.loading) {
      return (
        <View style={{flex: 1, justifyContent: 'center', alignItems: 'center'}}>
          <ActivityIndicator style={{marginTop: -60}} size="large"/>
        </View>
      )
    }
    return (
      <View style={styles.container}>
        <ListView
          enableEmptySections={true}
          renderRow={this.renderRow.bind(this)}
          dataSource={this.state.dataSource} />
        <YouTubeWebView ref={r => this.youtubePlayer = r}/>
      </View>
    )
  }