使用react的hooks怎么改写这段代码:class APP extends React.Component { constructor(props) { super(props); this.player = null } componentDidMount(){ var asse = '1', window.player = this.player; } fullScreent=()=>{ this.player.fullScreent(); } render(){ return ( <div> <button onClick={()=> this.fullScreent()}>开始</button> <div> ) } } export default APP;
时间: 2024-04-13 07:30:04 浏览: 108
使用React的Hooks,你可以将上面的代码改写为函数组件。下面是改写后的代码:
```jsx
import React, { useEffect, useRef } from 'react';
function APP() {
const playerRef = useRef(null);
useEffect(() => {
window.player = playerRef.current;
}, []);
const fullScreent = () => {
playerRef.current.fullScreent();
};
return (
<div>
<button onClick={fullScreent}>开始</button>
<div></div>
</div>
);
}
export default APP;
```
在函数组件中,我们使用了`useRef`来创建一个引用`playerRef`,它将被用于保存`player`实例的引用。在`useEffect`钩子中,我们将`playerRef.current`赋值给全局变量`window.player`。`fullScreent`函数仍然用于触发全屏播放,只是现在我们使用了`playerRef.current`来调用它。另外,按钮的点击事件直接绑定到`fullScreent`函数上。
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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。
```jsx
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。
使用react的hooks怎么改写下面这段代码:class APP extends React.Component { constructor(props) { super(props); this.player = null } componentDidMount(){ var asse = '1', player=new EZUIKit.EZUIKitPlayer({width:600}) window.player = this.player; } fullScreent=()=>{ this.player.fullScreent(); } render(){ return ( <div> <button onClick={()=> this.fullScreent()}>开始</button> <div> ) } } export default APP;
使用React的Hooks,你可以将上面的代码改写为函数组件。下面是改写后的代码:
```jsx
import React, { useEffect, useRef } from 'react';
import EZUIKit from 'ezuikit-js';
function APP() {
const playerRef = useRef(null);
useEffect(() => {
const player = new EZUIKit.EZUIKitPlayer({ width: 600 });
playerRef.current = player;
window.player = playerRef.current;
}, []);
const fullScreent = () => {
playerRef.current.fullScreent();
};
return (
<div>
<button onClick={fullScreent}>开始</button>
<div></div>
</div>
);
}
export default APP;
```
在函数组件中,我们使用了`useRef`来创建一个引用`playerRef`,它将被用于保存`player`实例的引用。在`useEffect`钩子中,我们创建了一个名为player的EZUIKitPlayer实例,并将其赋值给playerRef.current和window.player。`fullScreent`函数用于触发全屏播放,我们仍然使用`playerRef.current`来调用它。按钮的点击事件直接绑定到`fullScreent`函数上。
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