react-native-refreshable-listview下拉刷新组件

react-native-refreshable-listview 是下拉刷新 ListView，当数据重载的时候显示加载提示。

代码示例：

var React = require('react-native')
var {Text, View, ListView} = React
var ArticleStore = require('../stores/ArticleStore')
var StoreWatchMixin = require('./StoreWatchMixin')
var ArticleView = require('./ArticleView')
var RefreshableListView = require('./RefreshableListView')
var ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1.id !== r2.id})
var ArticlesScreen = React.createClass({
  mixins: [StoreWatchMixin],
  getInitialState() {
    return {dataSource: ds.cloneWithRows(ArticleStore.all())}
  },
  getStoreWatches() {
    this.watchStore(ArticleStore, () => {
      this.setState({dataSource: ds.cloneWithRows(ArticleStore.all())})
    })
  },
  reloadArticles() {
    return ArticleStore.reload() // returns a promise of reload completion
  },
  renderArticle(article) {
    return <ArticleView article={article} />
  },
  render() {
    return (
      <RefreshableListView
        dataSource={this.state.dataSource}
        renderRow={this.renderArticle}
        loadData={this.reloadArticles}
        refreshDescription="Refreshing articles"
      />
    )
  }
})