首先，我们需要创建一个子组件el-upload.vue，并在其中添加以下代码：
<template>
<div class="component-upload-image">
<el-upload
multiple
:action="uploadImgUrl"
list-type="picture-card"
:on-success="handleUploadSuccess"
:before-upload="handleBeforeUpload"
:limit="limit"
:on-error="handleUploadError"
:on-exceed="handleExceed"
ref="imageUpload"
:on-remove="handleDelete"
:show-file-list="true"
:headers="headers"
:file-list="fileList"
:on-preview="handlePictureCardPreview"
:class="{ hide: this.fileList.length >= this.limit }"
REFERRER="NO-REFERRER"
>
<i class="el-icon-plus"></i>
</el-upload>
<!-- 上传提示 -->
<div class="el-upload__tip" slot="tip" v-if="showTip">
请上传
<template v-if="fileSize">
大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
</template>
<template v-if="fileType">
格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
</template>
的文件
</div>
<el-dialog
:visible.sync="dialogVisible"
title="预览"
width="800"
append-to-body
>
<img
:src="dialogImageUrl"
style="display: block; max-width: 100%; margin: 0 auto"
/>
</el-dialog>
</div>
</template>
<script>
import { getToken } from "@/utils/auth";
import { downloadImg } from "@/api/login";
export default {
props: {
value: [String, Object, Array],
// 图片数量限制
limit: {
type: Number,
default: 5,
},
// 大小限制(MB)
fileSize: {
type: Number,
default: 200,
},
// 文件类型, 例如['png', 'jpg', 'jpeg']
fileType: {
type: Array,
default: () => ["png", "jpg", "jpeg","mp4","111"],
},
// 是否显示提示
isShowTip: {
type: Boolean,
default: true,
},
},
data() {
return {
number: 0,
uploadList: [],
newUploadList:[],
dialogImageUrl: "",
dialogVisible: false,
hideUpload: false,
uploadImgUrl: process.env.VUE_APP_BASE_API + "/file/upload", // 上传的图片服务器地址
headers: {
Authorization: "Bearer " + getToken(),
},
fileList: [],
logoId: "",
initValue: this.value,
};
},
async created() {
this.$emit("input", this.listToString(this.fileList));
this.$emit("success", {
url: this.listToString(this.fileList),
logoId: this.listParamsToString(this.newUploadList,",","logoId"),
// logoId: this.initValue,
});
},
watch: {
value: {
handler(val) {
if (val) {
// 首先将值转为数组
const list = Array.isArray(val) ? val : this.value.split(",");
// 然后将数组转为对象数组
this.fileList = list.map((item) => {
if (typeof item === "string") {
item = { name: item, url: item };
}
return item;
});
} else {
this.fileList = [];
return [];
}
},
deep: true,
immediate: true,
},
},
computed: {
// 是否显示提示
showTip() {
return this.isShowTip && (this.fileType || this.fileSize);
},
},
methods: {
// 上传前loading加载
handleBeforeUpload(file) {
let isImg = false;
if (this.fileType.length) {
let fileExtension = "";
if (file.name.lastIndexOf(".") > -1) {
fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
}
isImg = this.fileType.some((type) => {
if (file.type.indexOf(type) > -1) return true;
if (fileExtension && fileExtension.indexOf(type) > -1) return true;
return false;
});
} else {
isImg = file.type.indexOf("image") > -1;
}
if (!isImg) {
this.$modal.msgError(
`文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`
);
return false;
}
if (this.fileSize) {
const isLt = file.size / 1024 / 1024 < this.fileSize;
if (!isLt) {
this.$modal.msgError(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
return false;
}
}
this.$modal.loading("正在上传图片，请稍候...");
this.number++;
},
// 文件个数超出
handleExceed() {
this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
},
// 上传成功回调
async handleUploadSuccess(res, file,initFiles) {
if (res.code === 200) {
// let resUrl = await downloadImg(res.data.id);
// let fileUrl = URL.createObjectURL(resUrl).toString();
this.logoId = res.data.id;
this.dialogImageUrl = file.url;
// console.log(file.url)
// console.log(URL.createObjectURL(file.url).toString())
// this.uploadList.push({ name: res.data.name, url: file.url,logoId:res.data.id});
this.$emit('update:fileList', initFiles);
this.$modal.closeLoading();
// URL.revokeObjectURL(fileUrl);
// this.uploadedSuccessfully();
} else {
this.number--;
this.$modal.closeLoading();
this.$modal.msgError(res.msg);
this.$refs.imageUpload.handleRemove(file);
// this.uploadedSuccessfully();
}
},
// 删除图片
handleDelete(file, initFiles) {
// const findex = this.fileList.map((f) => f.name).indexOf(file.name);
// if (findex > -1) {
// this.fileList.splice(findex, 1);
// this.newUploadList.splice(findex, 1);
// this.$emit("input", this.listToString(this.fileList));
// this.$emit("success", {
// url: this.listToString(this.fileList),
// logoId: this.listParamsToString(this.newUploadList,",","logoId"),
// tempFile:this.listParamsToString(this.newUploadList,",","tempFile")
// // logoId: this.logoId,
// });
// }
this.$emit("update:fileList", initFiles);
},
// 上传失败
handleUploadError() {
this.$modal.msgError("上传图片失败，请重试");
this.$modal.closeLoading();
},
// 上传结束处理
// uploadedSuccessfully() {
// if (this.number > 0 && this.uploadList.length === this.number) {
// this.fileList = this.fileList.concat(this.uploadList);
// this.newUploadList = this.newUploadList.concat(this.uploadList);
// this.uploadList = [];
// this.number = 0;
// // console.log(this.fileList);
// // console.log(this.listParamsToString(this.newUploadList,",","logoId"));
// // return
// this.$emit("input", this.listToString(this.fileList));
// this.$emit("success", {
// url: this.listToString(this.fileList),
// logoId: this.listParamsToString(this.newUploadList,",","logoId"),
// // logoId: this.logoId,
// });
// this.$modal.closeLoading();
// }
// },
// 预览
handlePictureCardPreview(file) {
this.dialogImageUrl = file.url;
this.dialogVisible = true;
},
// 对象转成指定字符串分隔
listToString(list, separator) {
let strs = "";
separator = separator || ",";
for (let i in list) {
if (list[i].url) {
strs += list[i].url.replace(this.baseUrl, "") + separator;
}
}
return strs != "" ? strs.substr(0, strs.length - 1) : "";
},
// 对象属性转成指定字符串分隔
listParamsToString(list, separator,params) {
let strs = "";
separator = separator || ",";
for (let i in list) {
if (list[i][params]) {
strs += list[i][params] + separator;
}
}
return strs != "" ? strs.substr(0, strs.length - 1) : "";
},
},
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
transition: all 0s;
}
::v-deep .el-list-enter,
.el-list-leave-active {
opacity: 0;
transform: translateY(0);
}
</style>
接下来，在父组件中引入并使用这个子组件，同时传递文件数组：
<template>
<div>
<child-component :fileList="fileList" @update:fileList="updateFileList"></child-component>
</div>
</template>
<script>
import ChildComponent from './el-upload.vue';
export default {
components: {
ChildComponent,
},
data() {
return {
fileList: [], // 这里可以初始化一个文件数组，也可以从其他地方获取
};
},
methods: {
updateFileList(newFileList) {
this.fileList = newFileList;
},
},
};
</script>
