React Native-如何从父视图调用子视图的函数？

class ParentComponent extends React.Component {
  constructor(props) {
    super(props);
    this.callChildFunction = this.callChildFunction.bind(this);
  }

  callChildFunction() {
    // 在这里调用子组件的函数
    this.childComponent.childFunction();
  }

  render() {
    return (
      <View>
        <ChildComponent ref={(ref) => { this.childComponent = ref; }} />
        <Button onPress={this.callChildFunction} title="调用子组件函数" />
      </View>
    );
  }
}

class ChildComponent extends React.Component {
  childFunction() {
    // 子组件的函数逻辑
    console.log("子组件函数被调用");
  }

  render() {
    return (
      <View>
        {/* 子组件的其他内容 */}
      </View>
    );
  }
}