我正在尝试从父组件状态更新子组件的照片。对于所有其他路由,在安装应用程序后已经调用了适当的功能。渲染猫,狗或计算机的组件是PhotoList.js
但是现在,我希望能够在搜索后输入一个参数(例如/ search /:id)并在Container.js中运行一个名为getImages的函数,以从Flickr API中搜索任何类型的图片。
我尝试使用componentDidMount并调用其中带有match参数的getImages函数,但是它似乎并没有改变放入其中的数据道具。有人对我该如何做有什么建议吗?
这是Container.js
import React, {Component} from 'react';
import Photo from './Photo';
class Container extends Component {
componentDidMount() {
this.props.getImages(this.props.match.id)
}
render() {
return (
<div className="photo-container">
<h2>Results</h2>
<ul>
{this.props.data.map((photo,index)=>
<Photo
farm={photo.farm}
server={photo.server}
id={photo.id}
secret={photo.secret}
key={index}
/>
)}
</ul>
</div>
);
}
}
export default Container
这是PhotoList.js
import React, {Component} from 'react';
import Photo from './Photo';
import NoResults from './NoResults';
class PhotoList extends Component {
render() {
return (
<div className="photo-container">
<h2>Results</h2>
<ul>
{this.props.data.map((photo,index)=>
<Photo
farm={photo.farm}
server={photo.server}
id={photo.id}
secret={photo.secret}
key={index}
/>
)}
</ul>
</div>
);
}
}
export default PhotoList;
这是App.js
import React, {Component} from 'react';
import {
BrowserRouter,
Route,
Switch,
Redirect
} from 'react-router-dom';
import Search from './Search';
import Nav from './Nav';
import '../index.css';
import axios from 'axios';
import apiKey from './Config';
import NotFound from './NotFound';
import PhotoList from './PhotoList';
import NoResults from './NoResults';
import Container from './Container';
class App extends Component {
state= {
cats: [],
dogs: [],
computers: [],
searchResult: [],
loading: true
}
componentDidMount() {
this.getCats()
this.getDogs()
this.getComputers()
}
getCats=(query='cats')=> {
axios.get(`https://www.flickr.com/services/rest/?method=flickr.photos.search&api_key=${apiKey}&tags=${query}&per_page=24&page=1&format=json&nojsoncallback=1`)
.then(res=> {
const cats=res.data.photos.photo
this.setState({cats})
}).catch((error)=> {
console.log("There was an error parsing your data", error);
})
}
getDogs=(query='dogs')=> {
axios.get(`https://www.flickr.com/services/rest/?method=flickr.photos.search&api_key=${apiKey}&tags=${query}&per_page=24&page=1&format=json&nojsoncallback=1`)
.then(res=> {
const dogs=res.data.photos.photo
this.setState({dogs})
}).catch((error)=> {
console.log("There was an error parsing your data", error);
})
}
getComputers=(query='computers')=> {
axios.get(`https://www.flickr.com/services/rest/?method=flickr.photos.search&api_key=${apiKey}&tags=${query}&per_page=24&page=1&format=json&nojsoncallback=1`)
.then(res=> {
const computers=res.data.photos.photo
this.setState({computers});
}).catch((error)=> {
console.log("There was an error parsing your data", error);
})
}
getImages=(query)=> {
axios.get(`https://www.flickr.com/services/rest/?method=flickr.photos.search&api_key=${apiKey}&tags=${query}&per_page=24&page=1&format=json&nojsoncallback=1`)
.then (res=> {
const searchResult=res.data.photos.photo
this.setState({searchResult});
}).catch((error)=> {
console.log("There was an error parsing your data", error);
})
}
render() {
return (
<div className="container">
<Search getImages={this.getImages}/>
<Nav />
<Switch>
<Route exact path="/" render={()=> <Redirect to={'/cats'} />} />
<Route path='/cats' render={()=> <PhotoList data={this.state.cats}/>} />
<Route path='/dogs' render={()=> <PhotoList data={this.state.dogs} />} />
<Route exact path='/computers' render={()=> <PhotoList data={this.state.computers} />} />
<Route path='/search/:id' render={(props)=> <Container {...props} getImages={this.getImages} data={this.state.searchResult} />} />
<Route component={NotFound}/>
</Switch>
</div>
)
}
}
export default App;
答案 0 :(得分:0)
假设您使用的是react-router-dom 4及更高版本。
尝试
import React, { Component } from "react";
import { withRouter } from "react-router-dom"; //<-- import this
import Photo from "./Photo";
class Container extends Component {
componentDidMount() {
// Your this.props.match.id is likely undefined
this.props.getImages(this.props.match.params.id); // <-- Change here
}
...
}
export default withRouter(Container); // <-- Change this