问React Native - FlatList在刷新时不调用renderItem的生命周期方法

EN

<FlatList data={this.state.dataSource}
          renderItem={({item}) => <ListItem imageHref={item.imageHref} />}
          keyExtractor={(item, index) => index.toString()}
          refreshing={this.state.refreshing}
          onRefresh={/* Fetching data from JSON and updating dataSource[] */} />

render() {
    return <Image source={this.state.imageSource} />
}

componentDidMount() {
    fetch(this.props.imageHref)
        .then(response => {
            if(response.status !== 200)
                this.setState({imageSource: require('../assets/default-image.png')
            else
                this.setState({imageSource: {uri: this.props.imageHref}});
            }
        });
}