title: How to call the method by this(React Native)?
body: <pre><code>renderTopicList(){
      // console.log(this.props);
      //console.log(this.state.dataSource);
      return (
          &lt;ListView
          style={Style.listView}
          ref="listview"
          pageSize={15}
          dataSource={this.state.dataSource}
          renderFooter={this.renderFooter}
          renderRow={this.renderTopicListCell}
         // onEndReached={this.onEndReached}
          automaticallyAdjustContentInsets={false}
          showsVerticalScrollIndicator={false} 
          /&gt;
      );
  }
  
  renderTopicListCell(data){
      return (
          &lt;TopicListCell
              onSelect = { () =&gt; this.selectTopic(data) }
              data={data} /&gt;
      );
  }
  selectTopic(data){
  
      this.props.navigator.push({
          title: '详细' + (data.replies_count ? '（' + data.replies_count.toString() + '条回复）' : ''),
          component: TopicView,
          passProps: {
              data: data
          }
      });
  }
  </code></pre>
  
  <p>call onSelect in cell : <code>&lt;TouchableHighlight onPress={this.props.onSelect}/&gt;</code></p>
  
  <p>when I hit the cell，it gives me the following error: _this3.selectTopic is not a function.(In '_this3.selectTopic(data)','_this3.selectTopic' is undefined)</p>