Javascript api中的React图像标题错误可能与正确的索引有关
下稿自: 我的应用程序正在为lightbox使用react图像,并为旋转木马使用react旋转木马图像。我的api有一个标题和图像。我的问题是页脚标题中的标题总是随着选定的图像出现,而在lightbox旋转木马中不会更改。我认为这与所选图像的索引有关?到目前为止,我的代码是: 问题示例: slider.jsJavascript api中的React图像标题错误可能与正确的索引有关,javascript,reactjs,react-image,react-multi-carousel,Javascript,Reactjs,React Image,React Multi Carousel,下稿自: 我的应用程序正在为lightbox使用react图像,并为旋转木马使用react旋转木马图像。我的api有一个标题和图像。我的问题是页脚标题中的标题总是随着选定的图像出现,而在lightbox旋转木马中不会更改。我认为这与所选图像的索引有关?到目前为止,我的代码是: 问题示例: slider.js import React, { Component } from "react"; // import "../slider/slider.css"; import "./slider.c
import React, { Component } from "react";
// import "../slider/slider.css";
import "./slider.css";
import Carousel from "react-multi-carousel";
import "react-multi-carousel/lib/styles.css";
import LightBox, { Modal, ModalGateway } from "react-images";
const responsive = {
superLargeDesktop: {
breakpoint: { max: 4000, min: 3000 },
items: 1
},
desktop: {
breakpoint: { max: 3000, min: 1024 },
items: 1
},
tablet: {
breakpoint: { max: 1024, min: 464 },
items: 1
},
mobile: {
breakpoint: { max: 464, min: 0 },
items: 1
}
};
class Slider extends Component {
_isMounted = false;
state = {
awsApiData: [],
loading: false,
//selectedIndex: 0,
selectedImage: {},
lightboxIsOpen: false
};
componentDidMount() {
this._isMounted = true;
console.log("app mounted");
this.setState({ loading: true });
/*global fetch */
fetch("https://onelbip0e6.execute-api.eu-west-2.amazonaws.com/livestage/imgApi")
.then(data => data.json())
.then(data =>
// this.setState({ awsApiData: data[0], loading: false }, () =>
this.setState(
{
// awsApiData: data.map(item => ({source: item.download_url })),
awsApiData: data.map(item => ({
...item,
source: item.image
})),
loading: false
},
() => console.log(data)
)
);
}
componentWillUnmount() {
this._isMounted = false;
}
toggleLightbox = (post, selectedIndex) => {
// this.setState(state => ({
// lightboxIsOpen: !state.lightboxIsOpen,
// selectedIndex
// }));
this.setState(state => ({
lightboxIsOpen: !state.lightboxIsOpen,
selectedImage: { title: post.title, index: selectedIndex }
}));
};
render() {
return (
<div>
{this.state.loading ? (
<div className="text-center">Loading...</div>
) : (
<div>
<Carousel
additionalTransfrom={0}
showDots={false}
arrows={true}
autoPlaySpeed={3000}
autoPlay={true}
centerMode={false}
className="slider"
containerClass="container-with-dots"
dotListClass="dots"
draggable
focusOnSelect={false}
infinite
itemClass="carousel-top"
keyBoardControl
minimumTouchDrag={80}
renderButtonGroupOutside={false}
renderDotsOutside
responsive={responsive}
>
{Object.values(this.state.awsApiData).map((post, indx) => {
return (
<div
className="mt-5"
key={indx}
//onClick={() => this.toggleLightbox(indx)}
onClick={() => this.toggleLightbox(post, indx)}
>
<img
className="media-img card-img-top card-img-hero"
src={post.source}
alt="Alt text"
style={{ cursor: "pointer" }}
/>
</div>
);
})}
</Carousel>
<ModalGateway>
{this.state.lightboxIsOpen ? (
<Modal onClose={this.toggleLightbox}>
<LightBox
components={{
FooterCaption: () => <div>{this.state.selectedImage.title}</div>
}}
//currentIndex={this.state.selectedIndex}
currentIndex={this.state.selectedImage.index}
// formatters={{ getAltText }}
frameProps={{ autoSize: "height" }}
views={this.state.awsApiData}
/>
</Modal>
) : null}
</ModalGateway>
</div>
)}
</div>
);
}
}
export default Slider;
import React,{Component}来自“React”;
//导入“./slider/slider.css”;
导入“/slider.css”;
从“react multi Carousel”导入转盘;
导入“react multi carousel/lib/styles.css”;
从“react images”导入LightBox,{Modal,ModalGateway};
常数响应={
超大桌面:{
断点:{max:4000,min:3000},
项目:1
},
桌面:{
断点:{max:3000,min:1024},
项目:1
},
平板电脑:{
断点:{max:1024,min:464},
项目:1
},
流动电话:{
断点:{max:464,min:0},
项目:1
}
};
类滑块扩展组件{
_isMounted=错误;
状态={
awsApiData:[],
加载:false,
//已选择索引:0,
选择图像:{},
lightboxIsOpen:错误
};
componentDidMount(){
这个。_isMounted=true;
控制台日志(“安装的应用程序”);
this.setState({loading:true});
/*全局提取*/
取回(“https://onelbip0e6.execute-api.eu-west-2.amazonaws.com/livestage/imgApi")
.then(data=>data.json())
。然后(数据=>
//this.setState({awsApiData:data[0],loading:false},()=>
这是我的国家(
{
//awsApiData:data.map(item=>({source:item.download_url})),
awsApiData:data.map(项=>({
…项目,
来源:item.image
})),
加载:错误
},
()=>console.log(数据)
)
);
}
组件将卸载(){
这个。_isMounted=false;
}
toggleLightbox=(post,selectedIndex)=>{
//this.setState(state=>({
//lightboxIsOpen:!state.lightboxIsOpen,
//选定索引
// }));
this.setState(state=>({
lightboxIsOpen:!state.lightboxIsOpen,
selectedImage:{title:post.title,索引:selectedIndex}
}));
};
render(){
返回(
{this.state.loading(
加载。。。
) : (
{Object.values(this.state.awsApiData).map((post,indx)=>{
返回(
this.toggleLightbox(indx)}
onClick={()=>this.toggleLightbox(post,indx)}
>
);
})}
{this.state.lightboxIsOpen(
{this.state.selectedImage.title}
}}
//currentIndex={this.state.selectedIndex}
currentIndex={this.state.selectedImage.index}
//格式化程序={{getAltText}}
frameProps={{autoSize:“height”}
视图={this.state.awsApiData}
/>
):null}
)}
);
}
}
导出默认滑块;
您的标题设置为此.state。选择了图像.title
,但当您的灯箱视图更改时,您从不更新状态(即调用setState()
)
您需要将onViewChange
处理程序添加到LightBox
组件:
<LightBox onViewChange={handleLightBoxViewChange} .../>
如果不希望更新状态,则页脚组件将接收当前视图,以便您可以按如下方式进行更新:
<LightBox
components={{
FooterCaption: ({currentView}) => <div>{currentView.title}</div>
}}
//...
/>
{currentView.title}
}}
//...
/>
谢谢这两个选项中的任何一个。有没有更好的方法可以做到这一点,即更新状态还是通过视图来完成?@Sole我不认为有更好的方法,你只需要决定哪一种最适合你的需要。更新页脚字幕
是最简单的方法,通常是一个好方法。
<LightBox
components={{
FooterCaption: ({currentView}) => <div>{currentView.title}</div>
}}
//...
/>