Reactnative ScrollView 内的 FlatList 不滚动

我在ScrollView里有4个FlatList，maxHeight设置为200.

<ScrollView>
  <FlatList/>
  <FlatList/>
  <FlatList/>
  <FlatList/>
</ScrollView>

当我try 滚动FlatList时，它不会滚动，而是滚动ScrollView.如何解决此问题？

Full Source Code

import { Component, default as React } from 'react';
import { FlatList, ScrollView, Text } from 'react-native';

export  class LabScreen extends Component<{}> {
  render() {
    return (
      <ScrollView>
        {this.renderFlatList('red')}
        {this.renderFlatList('green')}
        {this.renderFlatList('purple')}
        {this.renderFlatList('pink')}
      </ScrollView>
    );
  }

  getRandomData = () => {
    return new Array(100).fill('').map((item, index) => {
      return { title: 'Title ' + (index + 1) };
    });
  };

  renderFlatList(color: string) {
    return (
      <FlatList
        data={this.getRandomData()}
        backgroundColor={color}
        maxHeight={200}
        marginBottom={50}
        keyExtractor={(item, index) => index.toString()}
        renderItem={({ item }) => <Text>{item.title}</Text>}
      />
    );
  }
}

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