任务在 reactnative 中因请求而成为orphaned 这是什么意思

我正在try 为带有按钮和其他动作的瓷砖构建一个网格系统.我try 了react-native playground 网格图像源，你可以找到here个.将zIndex添加到单个图片时，会产生以下"stacktrace"和错误.图像永远不会被描绘出来.

如果您感兴趣，这正是我正在使用的组件:

export default class GridLayout extends Component {
  constructor () {
    super()
    const { width, height } = Dimensions.get('window')
    this.state = {
      currentScreenWidth: width,
      currentScreenHeight: height
    }
  }

  handleRotation (event) {
    var layout = event.nativeEvent.layout
    this.setState({ currentScreenWidth: layout.width, currentScreenHeight: layout.height })
  }

  calculatedSize () {
    var size = this.state.currentScreenWidth / IMAGES_PER_ROW
    return { width: size, height: size }
  }

  renderRow (images) {
    return images.map((uri, i) => {
      return (
        <Image key={i} style={[styles.image, this.calculatedSize()]} source={{uri: uri}} />
      )
    })
  }

  renderImagesInGroupsOf (count) {
    return _.chunk(IMAGE_URLS, IMAGES_PER_ROW).map((imagesForRow) => {
      console.log('row being painted')
      return (
        <View key={uuid.v4()} style={styles.row}>
          {this.renderRow(imagesForRow)}
        </View>
      )
    })
  }

  render () {
    return (
      <ScrollView style={styles.grid} onLayout={(ev) => this.handleRotation(ev)} contentContainerStyle={styles.scrollView}>
        {this.renderImagesInGroupsOf(IMAGES_PER_ROW)}
      </ScrollView>
    )
  }
}

var styles = StyleSheet.create({

  grid: {
    flex: 1,
    backgroundColor: 'blue'
  },

  row: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'flex-start',
    backgroundColor: 'magenta'
  },

  image: {
    zIndex: 2000
  }
})