背景:vue/element.ui
1..html:
单个图片上传大小限制:10M
图片数限制:1张至6张
注意
- input标签的accept属性,设置上传图片的格式
input标签的multiple="multiple",设置可否多选
2.css:
.img-list { padding: 0; overflow: hidden; li { position: relative; list-style: none; float: left; margin: 10px; .del-btn { position: absolute; top: 0; right: 0; color: transparent; } img { border-radius: 3px; } &:hover .del-btn { color: #000; } } } .little-tip { color: #c7c9d1; } .upload-video { position: relative; display: inline-block; border: 1px solid #cacdd4; padding: 0 15px; border-radius: 3px; background-color: #3f9dff; color: #fff; .videofile { position: absolute; width: 100%; height: 100%; right: 0; top: 0; opacity: 0; } } 3.upload.js
function upload(config) { this.config = config; }
upload.prototype.ajaxUp = function (fileId, callback) { for (var i = 0; i < $('#' + fileId)[0].files.length; i++) { var formData = new FormData(); formData.append('file_list', $('#' + fileId)[0].files[i].name); ajax({ url: '验签url,如果不需要省略该ajax', type: 'POST', data: formData, async: false, dataType: 'json', index: i, success: function (data, cur_i) { if (0 === data.code) { var signs = data.data.signs; var policy = signs.Policy; var kss = signs.KSSAccessKeyId; var key = signs.key; var acl = signs.acl; var signature = signs.Signature; var name = signs.file_name; var formDataUp = new FormData(); formDataUp.append('KSSAccessKeyId', kss); formDataUp.append('acl', acl); formDataUp.append('key', key); formDataUp.append('Policy', policy); formDataUp.append('Signature', signature); formDataUp.append('file', $('#' + fileId)[0].files[cur_i]); var fileObj = $('#' + fileId)[0].files[cur_i]; ajax({ url: '上传服务器url', type: 'POST', data: formDataUp, async: false, success: function () { callback(key, name, fileObj); window.console.log('upload class success'); }, error: function () { window.console.log('与提交服务器通信发生错误'); } }); } }, error: function () { window.console.log('与获取服务器通信发生错误'); } }); } }; 4.js的使用
import Uploader from '@/libs/upload'
let uploader = new Uploader() uploader.ajaxUp(containerId, (key, name, fileObj) => { let host = '上传服务器url' let url = host + key _this.process = '上传完成' _this.isDelAction = false obj.resourceUrl = url _this.recordForm.item.push(obj) })
注意:
@change事件,上传时,如果连续上传同一张图片,则第二次不会再触发change事件
解决方法:同时给该input绑定click事件,清除该事件源e.target的value值,即e.target.value=''
原理:
- 当input捕获到焦点后,系统储存当前值
- 当input焦点离开后,判断当前值与之前存储的值是否不等,如果为true则触发onchange事件