react-native – 如何将组件引用传递给onPress回调？

我已经意识到onPress处理程序是无用的,因为我无法获得按下的种族参考.我得到ref没有定义错误.

var races = Engine.possibleRaces;

function racePressed(ref) {
    console.log("REF: " + ref); // is never called
}

var races = Engine.possibleRaces;
var rowViews = [];
for (var i = 0; i < races.length; i++) {
  rowViews.push(
    <Text
      ref={i}
      onPress={() => racePressed(ref)} // ref is not defined
      style={styles.raceText}>{races[i].text}
    </Text>

  );
}

<View style={{width: Screen.width,flexDirection:'row',flexWrap: 'wrap',alignItems: "center"}}>
       {rowViews}
</View>

我也尝试将i作为参数传递.它不起作用,因为它在迭代结束后具有值.基本上它有races.length值.

onPress={() => racePressed(i)} // Same as races.length

编辑：

我确实将问题隔离到以下程序.

'use strict';
import React,{
  AppRegistry,Component,StyleSheet,Text,View
} from 'react-native';

let texts = [{text: "Click wrapper text1"},{text: "Click wrapper text2"}];

class sandbox extends Component {

  rowPressed(ref,i) {
    console.log("rowPressed: " + ref + " " + i)
  }

  render() {

    var rows = [];

    for (var i = 0; i < texts.length; i++) {
      rows.push(
        <Text
          ref={i}
          onPress={() => this.rowPressed.bind(this,i)}
          style={styles.raceText}>{texts[i].text}
        </Text>
      );
    }

    return (
      <View style={styles.container}>

        <View>
          {rows}
        </View>

      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,justifyContent: 'center',alignItems: 'center'
  }
});

AppRegistry.registerComponent('sandbox',() => sandbox);

除非跟随警告,否则不会调用回调并且不会抛出任何错误

[tid:com.facebook.React.JavaScript] Warning: Each child in an array or iterator should have a unique "key" prop. Check the render method of `sandbox`. See https://fb.me/react-warning-keys for more information.