react 计时器如何实现定时任务来从数据库去数据并放在state中

Question

我现在有赢组件，是从数据库中取得数据，并通过state状态存放

callGetMvnDataPackageLogFn(orderCodeData).then((res) => {      this.setState({ data: res.data });
    });

我现在想要给这个添加一个计时器去定时请求数据，我自己使用的是：

const intervals = stInterval(function(){
  callGetMvnDataPackageLogFn(orderCodeData).then((res) => {
    this.setState({ data: res.data });
  });},200)

但是这并不行，请问该如何写？

Answer 1

React官网首页的定时器例子,自己琢磨下！class Timer extends React.Component {&nbsp; constructor(props) {&nbsp; &nbsp; super(props);&nbsp; &nbsp; this.state = {secondsElapsed: 0};&nbsp; }&nbsp; tick() {&nbsp; &nbsp; this.setState((prevState) => ({&nbsp; &nbsp; &nbsp; secondsElapsed: prevState.secondsElapsed + 1&nbsp; &nbsp; }));&nbsp; }&nbsp; componentDidMount() {&nbsp; &nbsp; this.interval = setInterval(() => this.tick(), 1000);&nbsp; }&nbsp; componentWillUnmount() {&nbsp; &nbsp; clearInterval(this.interval);&nbsp; }&nbsp; render() {&nbsp; &nbsp; return (&nbsp; &nbsp; &nbsp; <div>Seconds Elapsed: {this.state.secondsElapsed}</div>&nbsp; &nbsp; );&nbsp; }}ReactDOM.render(<Timer />, mountNode);