<template>
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<text :data="flag" :props="config" :change:data="fileManager.watchData" :change:props="fileManager.watchProps"></text>
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</template>
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<script>
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/**
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* 文件选择 - APP端
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* @author sonve
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* @version 1.0.0
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* @date 2024-12-04
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*/
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export default {
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props: {
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/**
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* 配置项
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* @tutorial https://developer.mozilla.org/zh-CN/docs/Web/HTML/Element/input/file
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*/
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config: {
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type: Object,
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default: () => {
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return {
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accept: `.doc,.docx,.xls,.xlsx,.pdf,.zip,.rar,
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application/msword,
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application/vnd.openxmlformats-officedocument.wordprocessingml.document,
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application/vnd.ms-excel,
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application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,
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application/pdf,
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application/zip,
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application/x-rar-compressed`,
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multiple: false
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}
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}
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}
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},
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data() {
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return {
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flag: 0 // 监听标志
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}
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},
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methods: {
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chooseFile() {
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this.flag++ // 修改监听标志
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},
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rawFile(file) {
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this.$emit('confirm', file)
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}
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}
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}
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</script>
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<script module="fileManager" lang="renderjs">
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import { base64ToPath } from '../common/file-handler.js';
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export default {
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data() {
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return {
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configCopy: {}, // 跟随vue中props的配置
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}
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},
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methods: {
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watchData(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.openFileManager()
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}
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},
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watchProps(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.configCopy = newValue
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}
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},
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openFileManager() {
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try {
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const { accept, multiple } = this.configCopy
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// 创建文件选择器input
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let fileInput = document.createElement('input')
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fileInput.setAttribute('type', 'file')
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fileInput.setAttribute('accept', accept)
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// 注：是否多选不要直接赋值multiple，应当是为false时不添加multiple属性
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if(multiple) fileInput.setAttribute('multiple', multiple)
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fileInput.click()
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// 封装为Promise的FileReader读取文件
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const readFileAsDataURL = (file) => {
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return new Promise((resolve, reject) => {
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let reader = new FileReader();
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reader.readAsDataURL(file);
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reader.onload = async (event) => {
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const base64 = event.target.result
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const path = await base64ToPath(base64)
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resolve({
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name: file.name,
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type: file.type,
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size: file.size,
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base64,
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path
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});
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};
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reader.onerror = (error) => {
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reject(error);
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};
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});
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}
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fileInput.addEventListener('change', async (e) => {
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let files = e.target.files // 注：此处为FileList对象，并非常规数组
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let results = await Promise.all(
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// Array.from 方法可以将类数组对象转换为真正的数组
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Array.from(files).map(item => readFileAsDataURL(item))
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);
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// callMethod不支持流数据，无法直接传递文件流对象
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this.$ownerInstance.callMethod('rawFile', results)
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})
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} catch (err) {
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console.warn('==== openFileManager catch error :', err);
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}
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}
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}
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}
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</script>
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