当滚动到达结尾时，我正在使用此库https://www.npmjs.com/package/react-infinite-scroller来加载更多内容。
我的代码如下所示：
import React from 'react';
import {Route, Link} from 'react-router-dom';
import FourthView from '../fourthview/fourthview.component';
import {Bootstrap, Grid, Row, Col, Button, Image, Modal, Popover} from 'react-bootstrap';
import traineeship from './traineeship.api';
import Header from '../header/header.component';
import InfiniteScroll from 'react-infinite-scroller';
require('./traineeship.style.scss');
class Traineeship extends React.Component {
constructor(props) {
super(props);
this.state = {
companies: [],
page: 0,
resetResult: false,
};
}
componentDidMount() {
this.fetchCompanies(this.state.page);
}
fetchCompanies = page => {
traineeship.getAll(page).then(response => {
if (response.data) {
const companies = Array.from(this.state.companies);
this.setState({companies: companies.concat(response.data._embedded.companies)});
} else {
console.log(response);
}
});
};
render() {
return (
<div className={"wrapperDiv"}>
{JSON.stringify(this.props.rootState)}
<div className={"flexDivCol"}>
<div id="header">
<Header/>
</div>
<div id="result">
<div className={"search"}>
<h2>Harjoittelupaikkoja</h2>
<p className={"secondaryColor"}>{this.state.companies.length} paikkaa löydetty</p>
</div>
<div className={"filters"}>
<h5 style={{marginTop: '30px', marginBottom: '10px'}} className={"primaryColor"}>
Hakukriteerit</h5>
<div className={"filter"}>Ravintola- ja cateringala</div>
<div className={"filter"}>Tarjoilija</div>
<div className={"filter"}>Kaikki</div>
</div>
<div className={"searchResults"}>
<h5 style={{marginTop: '30px', marginBottom: '10px'}} className={"primaryColor"}>
Hakutulokset</h5>
<InfiniteScroll
pageStart={0}
loadMore={ this.fetchCompanies }
hasMore={true || false}
loader={<div className="loader" key={0}>Loading ...</div>}
useWindow={false}
>
{
this.state.companies.map((traineeship, key) => (
<div id={"item"} key={key}>
<div className={"companyInfo"}>
<div className={"heading"}>
<div id={"companyDiv"}>
<p style={{
fontSize: '18px',
lineHeight: '18px'
}}>{traineeship.name}</p>
</div>
{
traineeship.video == null
? ''
:
<div id={"videoDiv"}>
<div className={"youtubeBox center"}>
<div id={"youtubeIcon"}>
<a className={"primaryColor"}
href={traineeship.mediaUrl}>
<span style={{marginRight: '3px'}}><Image
src="http://www.stickpng.com/assets/images/580b57fcd9996e24bc43c545.png"
style={{
width: '24px',
height: '17px'
}}/></span>
<span> <p style={{
fontSize: '13px',
lineHeight: '18px',
margin: 0,
display: 'inline-block'
}}>Esittely</p></span>
</a>
</div>
<div id={"txtVideo"}>
</div>
</div>
</div>
}
</div>
<div className={"location"}>
<div id={"locationIcon"}>
<Image src="assets/img/icLocation.png"
style={{marginTop: '-7px'}}/>
</div>
<div id={"address"}>
<a href={"https://www.google.com/maps/search/?api=1&query=" + encodeURI("Fredrikinkatu 4, Helsinki")}>
<p className={"primaryColor"}
style={{fontSize: '13px'}}>{traineeship.city}(show in
map)</p>
</a>
</div>
</div>
<div className={"companyDescription"}>
<p className={"secondaryColor"} style={{
fontSize: '14px',
lineHeight: '20px'
}}>{traineeship.description}</p>
</div>
<div className={"companyContacts"} style={{marginTop: '20px'}}>
<p className={"contactInfo"}>URL: {traineeship.website}</p>
<p className={"contactInfo"}>Email: {traineeship.email}</p>
<p className={"contactInfo"}>Puh: {traineeship.phonenumber}</p>
<p className={"contactInfo"}>Contact: {traineeship.contact}</p>
</div>
</div>
</div>
))
}
</InfiniteScroll>
</div>
</div>
</div>
</div>
);
}
}
export default Traineeship;
问题在于它一直在永久地调用fetchCompanies。有没有解决这个问题？
在文档中没有关于loadmore函数应该如何的示例。
答案 0 :(得分：0)
问题，渲染方法中的调用函数
loadMore={ this.fetchCompanies }
在componentDidMount中调用函数并在模板中使用this.state打印后设置状态
答案 1 :(得分：0)
“ hasMore”在您的情况下始终为true，在没有下一个URL时将其设置为false。