Javascript 如何解决Redux表单图像上传和裁剪问题?
我在分页时在页面上呈现了一个用户列表。单击“编辑”按钮可以更改每个用户配置文件。模式有一个图像选择和上传,然后裁剪选项。图像选择、裁剪和上传工作正常,但问题是如果我选择了一个图像,然后关闭模式,然后转到下一个用户,它会显示相同的图像进行裁剪,而无需按下选择按钮。第二个问题与第一个有关,上传后的图像。选择任何要编辑的用户都会显示相同的图片 页面:UserUpdateModal.js:Javascript 如何解决Redux表单图像上传和裁剪问题?,javascript,reactjs,redux,redux-form,Javascript,Reactjs,Redux,Redux Form,我在分页时在页面上呈现了一个用户列表。单击“编辑”按钮可以更改每个用户配置文件。模式有一个图像选择和上传,然后裁剪选项。图像选择、裁剪和上传工作正常,但问题是如果我选择了一个图像,然后关闭模式,然后转到下一个用户,它会显示相同的图像进行裁剪,而无需按下选择按钮。第二个问题与第一个有关,上传后的图像。选择任何要编辑的用户都会显示相同的图片 页面:UserUpdateModal.js: <AccountProfileForm submitCb={this.updateProfi
<AccountProfileForm
submitCb={this.updateProfile}
errors={errors}
options={this.options}
initialValues ={this.props.initialValues}
randomId={this.randomId()}
/>
页面AccountProfileForm.js
<Field
name="first_name"
type="text"
label='First Name'
className='form-control'
component={BwmInput}
validate={[required,text,minLength2, maxLength32]}
/>
<Field
name="image_link"
id={id}
type="file"
label='Image'
className='form-control'
component={BwmFileUpload}
/>
以下是要上载的主要类:
BwmFileUpload.js
import React from 'react';
import ReactCrop, { makeAspectCrop } from 'react-image-crop';
import { toast } from 'react-toastify';
import * as actions from '../../../actions';
import { v4 as uuidv4 } from 'uuid';
export class BwmFileUpload extends React.Component {
constructor() {
super();
this.state = {
src: null,
selectedFile: undefined,
imageBase64: '',
initialImageBase64: '',
croppedImageUrl: {},
blob:{},
pending: false,
status: 'INIT',
crop: {
unit: '%',
width: 50,
aspect: 3 / 4,
}
}
}
imageId=() =>{
let id = Math.floor(Math.random() * 100) + 1;
return id;
}
resetToDefaultState(status) {
this.setState({
pending: false,
status,
selectedFile: undefined,
croppedImage: {},
crop: {},
initialImageBase64: '',
imageBase64: ''
});
}
onSelectFile = e => {
const selectedFile = e.target.files[0];
if (e.target.files && e.target.files.length > 0) {
const reader = new FileReader();
reader.addEventListener('load', () =>
this.setState({ src: reader.result,selectedFile })
);
reader.readAsDataURL(selectedFile);
}
};
onCropChange=(crop) =>{
this.setState({ crop });
}
onImageLoaded = image => {
this.imageRef = image;
if (image.naturalWidth > 1920 && image.naturalHeight > 1080) {
this.resetToDefaultState('INIT');
toast.error('Max width of an image is 1920px and height 1080px');
return;
}
}
onCropComplete = crop => {
this.makeClientCrop(crop);
};
async makeClientCrop(crop) {
const { selectedFile } = this.state;
if (this.imageRef && crop.width && crop.height) {
const croppedImageUrl = await this.getCroppedImg(this.imageRef, crop, selectedFile.name);
this.setState({ croppedImageUrl });
}
}
getCroppedImg(image, crop, fileName) {
const canvas = document.createElement('canvas');
const scaleX = image.naturalWidth / image.width;
const scaleY = image.naturalHeight / image.height;
canvas.width = crop.width;
canvas.height = crop.height;
const ctx = canvas.getContext('2d');
ctx.drawImage(
image,
crop.x * scaleX,
crop.y * scaleY,
crop.width * scaleX,
crop.height * scaleY,
0,
0,
crop.width,
crop.height
);
return new Promise((resolve, reject) => {
canvas.toBlob(blob => {
if (!blob) {
//reject(new Error('Canvas is empty'));
toast.error('Canvas is empty');
return;
}
blob.name = fileName;
this.setState({blob});
window.URL.revokeObjectURL(this.fileUrl);
this.fileUrl = window.URL.createObjectURL(blob);
resolve(this.fileUrl);
}, 'image/jpeg');
});
}
onError=(error)=> {
this.setState({pending: false, status: 'FAIL'});
}
onSuccess = (uploadedImage) => {
const {onChange} = this.props.input || this.props;
this.resetToDefaultState('INIT');
onChange(uploadedImage);
this.setState({src: null,selectedFile:undefined});
}
uploadImage=()=> {
const { blob } = this.state;
if (blob) {
this.setState({pending: true, status: 'INIT'});
actions.uploadImage(blob, 'users').then(
(uploadedImage) => { this.onSuccess(uploadedImage) },
(error) => { this.onError(error)})
}
}
renderSpinningCircle() {
const { pending } = this.state;
if (pending) {
return (
<div className='img-loading-overlay'>
<div className='img-spinning-circle'>
</div>
</div>
)
}
}
renderImageStatus() {
const { status } = this.state;
if (status === 'OK') {
return <div className='alert alert-success'> Image Uploaded Succesfuly! </div>
}
if (status === 'FAIL') {
return <div className='alert alert-danger'> Image Upload Failed! </div>
}
}
render() {
const {crop,croppedImageUrl, src } = this.state;
return (
<div className='img-upload-container' id={this.imageId()}>
<label className='img-upload btn btn-bwm'>
<span className='upload-text'> Select an image </span>
<input type='file' id={this.imageId()}
accept='.jpg, .png, .jpeg'
onChange={this.onSelectFile}/>
</label>
{ src &&
<button className='btn btn-success btn-upload'
type='button' id={this.imageId()}
disabled={!src}
onClick={() => this.uploadImage()}>
Upload Image
</button>
}
{ src &&
<ReactCrop src={src}
crop={crop}
ruleOfThirds
onImageLoaded={this.onImageLoaded}
onComplete={this.onCropComplete}
onChange={this.onCropChange} />
}
{ croppedImageUrl &&
<div className='img-preview-container' id={this.imageId()}>
<div className='img-preview' id={this.imageId()}
style={{'backgroundImage': 'url(' + croppedImageUrl + ')'}}>
</div>
{this.renderSpinningCircle()}
</div>
}
{this.renderImageStatus()}
</div>
)
}
}
从“React”导入React;
从“react image crop”导入ReactCrop,{makeAspectCrop};
从'react toastify'导入{toast};
从“../../../actions”导入*作为操作;
从“uuid”导入{v4作为uuidv4};
导出类BwmFileUpload扩展了React.Component{
构造函数(){
超级();
此.state={
src:null,
selectedFile:未定义,
imageBase64:“”,
initialImageBase64:“”,
croppedImageUrl:{},
水滴:{},
待定:错误,
状态:“INIT”,
作物:{
单位:‘’,
宽度:50,
相位:3/4,
}
}
}
imageId=()=>{
设id=Math.floor(Math.random()*100)+1;
返回id;
}
重置默认状态(状态){
这是我的国家({
待定:错误,
地位
selectedFile:未定义,
裁剪图像:{},
作物:{},
initialImageBase64:“”,
imageBase64:“”
});
}
onSelectFile=e=>{
const selectedFile=e.target.files[0];
如果(e.target.files&&e.target.files.length>0){
const reader=new FileReader();
reader.addEventListener('load',()=>
this.setState({src:reader.result,selectedFile})
);
reader.readAsDataURL(selectedFile);
}
};
onCropChange=(裁剪)=>{
这个.setState({crop});
}
onImageLoaded=图像=>{
this.imageRef=图像;
if(image.naturalWidth>1920&&image.naturalHeight>1080){
resetToDefaultState('INIT');
toast.error('图像的最大宽度为1920px,高度为1080px');
返回;
}
}
onCropComplete=裁剪=>{
这个.makeClientCrop(crop);
};
异步makeClientCrop(裁剪){
const{selectedFile}=this.state;
if(this.imageRef&&crop.width&&crop.height){
const cropedimagerurl=wait this.getcropedimg(this.imageRef,crop,selectedFile.name);
this.setState({cropedimageurl});
}
}
getCroppedImg(图像、裁剪、文件名){
const canvas=document.createElement('canvas');
const scaleX=image.naturalWidth/image.width;
const scaleY=image.naturalHeight/image.height;
canvas.width=crop.width;
canvas.height=crop.height;
const ctx=canvas.getContext('2d');
ctx.drawImage(
形象,,
crop.x*scaleX,
crop.y*scaleY,
crop.width*scaleX,
crop.height*scaleY,
0,
0,
裁剪宽度,
作物高度
);
返回新承诺((解决、拒绝)=>{
canvas.toBlob(blob=>{
如果(!blob){
//拒绝(新错误(“画布为空”);
toast.error('Canvas为空');
返回;
}
blob.name=文件名;
this.setState({blob});
window.URL.revokeObjectURL(this.fileUrl);
this.fileUrl=window.URL.createObjectURL(blob);
解析(this.fileUrl);
}“图像/jpeg”);
});
}
onError=(错误)=>{
this.setState({pending:false,status:'FAIL'});
}
onSuccess=(上传图像)=>{
const{onChange}=this.props.input | | this.props;
resetToDefaultState('INIT');
onChange(上传图像);
this.setState({src:null,selectedFile:undefined});
}
上传图像=()=>{
const{blob}=this.state;
如果(blob){
this.setState({pending:true,status:'INIT'});
uploadImage(blob,'users')。然后(
(UploadeImage)=>{this.onSuccess(UploadeImage)},
(错误)=>{this.onError(错误)})
}
}
RenderSpiningCircle(){
const{pending}=this.state;
如果(待定){
返回(
)
}
}
renderImageStatus(){
const{status}=this.state;
如果(状态=='OK'){
返回图片上传成功!
}
如果(状态==‘失败’){
返回图像上传失败!
}
}
render(){
const{crop,cropeImage URL,src}=this.state;
返回(
选择一个图像
{src&&
this.uploadImage()}>
上传图像
}
{src&&
}
{裁剪图像URL&&
{this.renderSpiningCircle()}
}
{this.renderImageStatus()}
)
}
}