使用react的hooks改写下面的代码：class APP extends React.Component{ constructor(props){ super(props); this.player = null; } componentDidMount(){ var accessToken = 'weujnXECBDACMLSKD'; this.player = new EZUIKit.EZUIKitPlayer({ id:'cftvgybh', accessToken:accessToken, width:600 }); window.player = this.player } play=()=>{ var playPromise = this.player.play(); playPromise.then((data) => { console.log('11111',data) } } return ( <div> <button onClick={()=>play()}>开始</button> </div> ) } export default APP;

使用React的Hooks改写上述代码，首先需要引入`useEffect`和`useState`这两个Hooks。然后将原来的类组件转换为函数组件。最后，将`componentDidMount`中的逻辑放在`useEffect`中，将`player`变量保存在`useState`中，并修改`play`方法的写法。

import React, { useEffect, useState } from 'react';

function App() {
  const [player, setPlayer] = useState(null);

  useEffect(() => {
    const accessToken = 'weujnXECBDACMLSKD';
    const newPlayer = new EZUIKit.EZUIKitPlayer({
      id: 'cftvgybh',
      accessToken,
      width: 600
    });
    setPlayer(newPlayer);
    window.player = newPlayer;
  }, []);

  const play = () => {
    const playPromise = player.play();
    playPromise.then((data) => {
      console.log('11111', data);
    });
  };

  return (
    <div>
      <button onClick={play}>开始</button>
    </div>
  );
}

export default App;

请注意，上述代码中的 `EZUIKit.EZUIKitPlayer` 和 `window.player` 是原有代码中的依赖，需要确保这些依赖在 React 组件中可用。