更新父组件状态时，React子组件未重新呈现

class ChildComponent extends React.Component {
  shouldComponentUpdate(nextProps) {
    return nextProps.someProp !== this.props.someProp;
  }

  render() {
    // 子组件的渲染逻辑
  }
}

const ChildComponent = React.memo(function ChildComponent(props) {
  // 子组件的渲染逻辑
});

class ParentComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      key: 0
    };
  }

  updateParentState() {
    this.setState(prevState => ({
      key: prevState.key + 1
    }));
  }

  render() {
    return (
      <div>
        <ChildComponent key={this.state.key} />
        <button onClick={this.updateParentState.bind(this)}>更新父组件状态</button>
      </div>
    );
  }
}