静态组件不会重新渲染 setState



我有这个静态内容组件,它不会重新渲染

  static Content = ({ children, tabId, activeTab }) => {
    return tabId === activeTab ? children : ''
  }

tabId 和 activeTab 使用 React.cloneElement 公开。

render() {
    return React.Children.map(this.props.children, child =>
      React.cloneElement(child, {
        handleTabClick: this.handleTabClick,
        tabId: this.props.id,
        activeTab: this.state.activeTab
      })
    );
  }

但是我不知道为什么当我单击选项卡 1 标题时选项卡 2 内容没有隐藏。

这是演示 https://codesandbox.io/s/w2mxm3zjq5

由于您的 Tab 组件存储该状态,因此当仅单击它时,该特定强制状态会更新,因此另一个状态不会更改,因此您需要将状态提升到 tabs 组件,它将起作用。

class Tab extends Component {
  static Title = ({ children, handleTabClick, tabId }) => {
    return <div onClick={() => handleTabClick(tabId)}>{children}</div>;
  };
  static Content = ({ children, tabId, activeTab }) => {
    console.log(tabId, "a", activeTab);
    return tabId === activeTab ? children : "";
  };
  render() {
    return React.Children.map(this.props.children, child =>
      React.cloneElement(child, {
        handleTabClick: this.props.handleTabClick,
        tabId: this.props.id,
        activeTab: this.props.activeTab
      })
    );
  }
}
class Tabs extends React.Component {
  state = {
    activeTab: this.props.activeTab
  };
  handleTabClick = id => {
    this.setState({
      activeTab: id
    });
  };
  render() {
    const { children, activeTab } = this.props;
    return React.Children.map(children, child =>
      React.cloneElement(child, {
        activeTab: this.state.activeTab,
        handleTabClick: this.handleTabClick
      })
    );
  }
}
const App = () => {
  return (
    <Tabs activeTab={1}>
      <Tab id={1}>
        <Tab.Title>Tab 1</Tab.Title>
        <Tab.Content>Tab 1 content goes here</Tab.Content>
      </Tab>
      <Tab id={2}>
        <Tab.Title>Tab 2</Tab.Title>
        <Tab.Content>Tab 2 content goes here</Tab.Content>
      </Tab>
    </Tabs>
  );
};

工作代码笔

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