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【已解决】ReactNative中如何实现(xxx)=>yyy中yyy中添加js代码

JavaScript crifan 14浏览 0评论

RN中,之前已经实现了:

                      renderRow={(rowData) =>
                          <View style={styles.customerRow}>
                            <Image style={styles.intentionLevel} source={require(‘./img/customerLevel_H.png’)} />
                            <Text style={styles.customerName}>{rowData.customerName}</Text>
                            <Text style={styles.intentionCar}>{rowData.intentionCar}</Text>
                            <Text style={styles.updateTime}>{rowData.updateTime}</Text>
                          </View>
                      }

此处想要对于:

<Image style={styles.intentionLevel} source={require(‘./img/customerLevel_H.png’)} />

改为:

<Image style={styles.intentionLevel} source={require(‘./img/customerLevel_’ + rowData.intentionLevel + ‘.png’)} />

其中,有想要去优化为:

var levelIconName = ‘./img/customerLevel_’ + rowData.intentionLevel + ‘.png’;
var levelIcon = require(levelIconName);
<Image style={styles.intentionLevel} source={levelIcon} />

但是很明显,代码就是不对的,语法上是错误的:

然后想要放到View外面,好像也不对:

想要搞清楚,对于:

{(xxx) => yyy }

其中,yyy中,此处原先是模块定义,比如Image,Text

想要在其中添加js代码,去计算点东西,如何写,语法是啥。

参考:

CameraRoll – React Native | A framework for building native apps using React

好像是:

(xxx) => {
    代码段;
    return (yyy);
}

去试试:

则确定是语法正确的了:

注:不过由于代码逻辑出错,所以重新优化了下:

                      renderRow={(rowData) => {
                          //var levelIconName = ‘./img/customerLevel_’ + rowData.intentionLevel + ‘.png’;
                          //var levelIconName = ‘./img/customerLevel_B.png’;
                          var levelIcon = require(‘./img/customerLevel_B.png’);
                          return (
                              <View style={styles.customerRow}>
                                <Image style={styles.intentionLevel} source={levelIcon} />
                                <Text style={styles.customerName}>{rowData.customerName}</Text>
                                <Text style={styles.intentionCar}>{rowData.intentionCar}</Text>
                                <Text style={styles.updateTime}>{rowData.updateTime}</Text>
                              </View>
                              );
                          }
                      }

【总结】

之前的:

{(xxx) => yyy }

其中yyy是模块的定义

其中想要在yyy中添加js代码段,则可以写成:

(xxx) => {
    代码段;
    return (yyy);
}

比如:

  renderRow={(rowData) => {
      var levelIcon = require(‘./img/customerLevel_B.png’);
      return (
          <View style={styles.customerRow}>
            <Image style={styles.intentionLevel} source={levelIcon} />
          </View>
          );
      }
  }

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