vue完整上传图片(阿里云OSS)
时间：2022-11-16 17:30:00
1.布局简单(样式去除)，图片浏览在左边，图片浏览在右边。input和一个span，当然span可自行设计，input它是隐藏的，点击外层div来触发它的onclick事件
<!--这里展示大图--> <div class="full_image" v-if="full_image"> <img :src="full_image" style="border-radius:3px"> <span style="position:absolute;right:10px;top:8px;font-size:16px;font-weight:400;cursor:pointer;user-select:none" @click="full_image=''">X</span> </div> <!--上传图片--> <div > <!--缩略图--> <div v-if="images"> <img :src="image.url" v-for="(image,index) in images" :key="index" @click="showImage" :data-url="image.url ''" style="cursor:pointer;"> </div> <!--上传图片--> <div @click="uploadImage"> <div style="width:80px;height:80px"> <input type="file" ref="image_input" accept=".png,.jpg,.jpeg" @change="imageSelect" hidden> <span>
+
<
/span
>
<span
>上传图片
<
/span
>
<span
>
(
{
{
images
.length
}
}
/
6
)
<
/span
>
<
/div
>
<
/div
>
<
/div
>
<button @click
=
"submit"
>提交
<
/button
>
2.images是一个数组存放已选择的图片文件base64编码，full_image点击缩略图时将base64放进去以显示大图，files用户选择的文件都放进去，image_urls是上传后返回的url；注意base64编码是为了不上传图片到服务器也能在页面预览
// 这里使用阿里的oss上传图片，导入oss
import {
ossTempAuth } from '@/api/oss'
import OSS from 'ali-oss';
data() {
return {
images: [],
full_image: '', // 当前放大图片base64码
files: [], // 图片File实例
image_urls: [], // 图片上传后返回url
};
},
3.这里是事件方法
// 点击图片div时触发input:click
uploadImage() {
this.$refs.image_input.dispatchEvent(new MouseEvent('click'));
},
// 点击缩略图时展示图片
showImage(event) {
this.full_image = event.target.dataset.url;
},
// uploadImage函数触发input的onclick事件，选择文件
imageSelect(event) {
// 判定文件列表
let file = event.target.files[0];
for (let i = 0; i < this.images.length; i++)
if (file.name == this.images[i].name) return;
// 新建文件实例
let ofReader = new FileReader();
// 读取文件流
ofReader.readAsDataURL(file);
// 转为base64码
ofReader.onload = evo => {
let base64 = evo.target.result;
// 将图片base64码放进去数组，以便能够实时预览
this.$set(this.images, this.images.length, {
name: file.name, url: base64 });
this.files.push(file);
}
},
4.上传
//按钮点击
submit(){
this.uploadFiles();
},
//准备上传
async uploadFiles() {
var self = this;
// 获取已经选择的文件流
var files = this.files;
var video = this.video_file;
// 获取秘钥信息
let authConfig = await ossTempAuth();
let back = authConfig.data;
// 实例化OSS
const client = await new OSS({
region: back.region,
accessKeyId: back.AccessKeyId,
accessKeySecret: back.AccessKeySecret,
bucket: back.bucket,
stsToken: back.SecurityToken,
});
// 上传图片
async function uploadImage() {
try {
for (let i = 0; i < files.length; i++) {
let name = files[i].name;
let index = name.lastIndexOf(".");
let ext = name.substr(index + 1);
const result = await client.put(
'hummingbird_v2/returns/pic/' + new Date().getTime() + self.uuid(10, 16) + i + '.' + ext,
files[i],
{
'Content-Encoding': 'UTF-8',
'Expires': 'Wed, 08 Jul 2030 16:57:01 GMT',
}
);
self.image_urls[i] = result.url;
}
} catch (e) {
this.model_upload = false;
console.log("上传图片失败", e);
}
}
// 调用上传
if (files.length > 0) uploadImage();
},
