Javascript 反应选定对象，无法显示所需内容

我希望在react组件中采用json格式的字符串

一个路径字符串，用于调用我的图像并将其放在我的webapp上

问题是，当我调用这个img时，它会调用我的所有数组。不仅是选定的一个

我该怎么办

这是我的密码：

    import React, { Component } from 'react';
import './poiList.css';

// Composant react affichant la liste des points d'intérêts
// C'est ce composant qui communique avec l'extension POI
class PoiList extends Component {
    constructor(props) {
        super(props);
        this.state = {
            poi: [],
            selectedPoi: undefined,
            settings: {
                defaultPointColor: [61, 183, 255],
                selectedPointColor: [37, 27, 255],
                defaultPointTransparancy: 0.4,
                spriteScaleFactor: 0.8,
                //altitude par défaut
                spriteAltitude: 15.0
            }
        }; 
    }

    componentDidMount() {                
        fetch('/settings')
            .then(response => {
                if (!response.ok) {
                    console.log(`status ${response.status}`);
                    throw new Error(`status ${response.status}`);
                }
                return response.json();
            })
            .then(json => {
                this.setState({
                    settings: json
                });               

            })
            .catch(e => {
                console.log(`Settings call failed: ${e}`);
                this.setState({
                    message: `Settings call failed: ${e}`
                });
            })
        fetch('/poi')
            .then(response => {
                if (!response.ok) {
                    console.log(`status ${response.status}`);
                    throw new Error(`status ${response.status}`);
                }
                return response.json();
            })
            .then(json => {
                this.setState({
                    poi: json.poi
                });               

            })
            .catch(e => {
                console.log(`POI call failed: ${e}`);
                this.setState({
                    message: `POI call failed: ${e}`
                });
            });
    }

    render() {
        if(this.props.poiExtension !== undefined) {
            this.props.poiExtension.clearAllPOI();
            this.props.poiExtension.setSettings(this.state.settings);
        }
        let self = this;
        let poiList = [];
        let poiPath = [];
        let index = 0;
        this.state.poi.map((poi) => {
            if(this.props.poiExtension !== undefined) {
                this.props.poiExtension.createPOI(poi, this.state.selectedPoi === poi);
            }
            let colorState = index % 2 === 1 ? "white" : "";
            colorState = this.state.selectedPoi === poi ? "selected" : colorState;
            let classC = "poiEntry " + colorState;
            let poiItem = (
                <div className={classC} key={index} onClick={() => {
                    self.setState({
                        selectedPoi: poi,
                    });



                   ****** *******console.log(poi.path);*************



                }}>
                    {poi.type} ({poi.x}, {poi.y}, {poi.z}) 
                </div>
            );
            index++;
            let poiItem2 = (
                <div className={classC} key={index} onClick={() => {
                    self.setState({
                        selectedPoi: poi,
                    });
                    console.log(poi.path);
                }}>
                    {poi.path} 
                </div>
            );



            poiList.push(poiItem);
            poiPath.push(poiItem2);




        })

        return(
            <div className="fullscreen">
                <div className="poiTitle">BATIMENT E17</div>
                <div className="poiList">
                    { poiList } 
                </div>
                <img className="poiDesc"
                    src={ poiPath } >
                </img>


            </div>

        );
    }
}

export default PoiList;

正如我所说，我可以一次调用所有图片，但我不知道如何获取所选图片。脚本中的console.log显示了我想要获取的内容，但我无法将其放入变量中

---

poiDesc类包含所有数组。

您的代码按预期工作，因为您正在将所有路径对象推送到img标记：

let poiPath = [];
...
poiPath.push(poiItem2);
...
<img className="poiDesc"
                    src={ poiPath } >
                </img>

您应该使用state获取/设置要与所选内容同步的图像路径：

<div className={classC} key={index} onClick={() => {
                    self.setState({
                        selectedPoi: poi,
                        selectedPath: poi.path
                    });
...
<img className="poiDesc"
                    src={ this.state.selectedPath } >
                </img>

<div className={classC} key={index} onClick={() => {
                    self.setState({
                        selectedPoi: poi,
                        selectedPath: poi.path
                    });
...
<img className="poiDesc"
                    src={ this.state.selectedPath } >
                </img>