滚动反应原生后如何检查元素是否可见?(跟踪展示次数和点击次数) [英] How to Check if element is visible after scrolling for react-native? (tracking impressions and clicks)

问题描述

如何在滚动 react-native 后检查元素是否可见?看到了一些反应的例子，但我专门寻找反应原生.想要跟踪展示次数和点击次数

解决方案

最终实现了一个库

How do I Check if element is visible after scrolling for react-native? saw some examples for react, but am looking specifically for react-native. Would like to track impressions and clicks

解决方案

ended up implementing a lib

https://www.npmjs.com/package/react-native-component-inview

import InView from 'react-native-component-inview'

const [isInView, setIsInView] = useState(false)

const checkVisible = (isVisible:boolean) => {
    if (isVisible){
      setIsInView(isVisible)
    } else {
      setIsInView(isVisible)
    }
  }

<ScrollView>
  <InView onChange={(isVisible) => this.checkVisible(isVisible)}>
    <View style={[styles.item, {backgroundColor: isInView ? 'yellow' : '#f9c2ff'}]}>
      <Text>yay</Text>
    </View>
  </InView>
</ScrollView>

References:

https://medium.com/@sanishkr/react-components-tracking-impressions-and-clicks-2fc9af1cc2c

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