Javascript Can';当从外部触发时,t更新反应组件状态
我对反应还比较陌生,还没有在网上找到解决方案。 我的代码:Javascript Can';当从外部触发时,t更新反应组件状态,javascript,reactjs,socket.io,react-hooks,react-component,Javascript,Reactjs,Socket.io,React Hooks,React Component,我对反应还比较陌生,还没有在网上找到解决方案。 我的代码: const socketPlay=()=>{ socket.emit(“播放”,true); } 常数socketStop=()=>{ socket.emit(“播放”,假); } 类应用程序扩展组件{ 状态={ 玩:错, url:'XXXX', } handlePlay=()=>{ this.setState({playing:true}); socketPlay(); } handlePause=()=>{ this.setStat
const socketPlay=()=>{
socket.emit(“播放”,true);
}
常数socketStop=()=>{
socket.emit(“播放”,假);
}
类应用程序扩展组件{
状态={
玩:错,
url:'XXXX',
}
handlePlay=()=>{
this.setState({playing:true});
socketPlay();
}
handlePause=()=>{
this.setState({playing:false})
socketStop();
}
ref=玩家=>{
this.player=player
}
render(){
const{url,playing,controls,light,volume,muted,loop,played,loaded,duration,playbackRate,pip}=this.state
常量分隔符=“·”
返回(
)
}
}
导出默认应用程序;
const app=新app();
socket.on(“toClient”,(args)=>{
log(“来自服务器:+args”);
开关(args){
大小写正确:
app.handlePlay();
打破
案例错误:
app.handlePause();
打破
违约:
打破
}
});
当我通过浏览器handlePlay()与组件交互时,会正确设置状态“播放:true”。如果通过app.handlePlay()在组件外部调用它,则状态仍为“playing:false”
app.handlePlay()正确执行。只有这个.setState不起作用。浏览器控制台抛出“警告:无法对尚未安装的组件调用setState”
非常感谢你的帮助。
提前感谢,,
Jan查看您的代码,在我看来,将
套接字添加到应用程序的类中(“toClient”上,
侦听器与componentDidMount
class App extends Component {
state = {
playing: false,
url: 'XXXX',
}
componentDidMount(){
socket.on("toClient", (args) => {
console.log("from server: " + args);
switch (args) {
case true:
this.handlePlay();
break;
case false:
this.handlePause();
break;
default:
break;
}
});
}
handlePlay = () => {
this.setState({ playing: true });
socketPlay();
}
handlePause = () => {
this.setState({ playing: false })
socketStop();
}
ref = player => {
this.player = player
}
render() {
const { url, playing, controls, light, volume, muted, loop, played, loaded, duration, playbackRate, pip } = this.state
const SEPARATOR = ' · '
return (
<ReactPlayer
ref={this.ref}
className='react-player'
width='40%'
playing={playing}
onPlay={this.handlePlay}
onPause={this.handlePause}
/>
)
}
}
export default App;
类应用程序扩展组件{
状态={
玩:错,
url:'XXXX',
}
componentDidMount(){
socket.on(“toClient”,(args)=>{
log(“来自服务器:+args”);
开关(args){
大小写正确:
这个;
打破
案例错误:
这个。handlePause();
打破
违约:
打破
}
});
}
handlePlay=()=>{
this.setState({playing:true});
socketPlay();
}
handlePause=()=>{
this.setState({playing:false})
socketStop();
}
ref=玩家=>{
this.player=player
}
render(){
const{url,playing,controls,light,volume,muted,loop,played,loaded,duration,playbackRate,pip}=this.state
常量分隔符=“·”
返回(
)
}
}
导出默认应用程序;
谢谢,非常好用!
class App extends Component {
state = {
playing: false,
url: 'XXXX',
}
componentDidMount(){
socket.on("toClient", (args) => {
console.log("from server: " + args);
switch (args) {
case true:
this.handlePlay();
break;
case false:
this.handlePause();
break;
default:
break;
}
});
}
handlePlay = () => {
this.setState({ playing: true });
socketPlay();
}
handlePause = () => {
this.setState({ playing: false })
socketStop();
}
ref = player => {
this.player = player
}
render() {
const { url, playing, controls, light, volume, muted, loop, played, loaded, duration, playbackRate, pip } = this.state
const SEPARATOR = ' · '
return (
<ReactPlayer
ref={this.ref}
className='react-player'
width='40%'
playing={playing}
onPlay={this.handlePlay}
onPause={this.handlePause}
/>
)
}
}
export default App;