本文实例讲述了Vue开发之封装上传文件组件与用法。分享给大家供大家参考，具体如下：
使用elementui的 el-upload插件实现图片上传组件
每个项目存在一定的特殊性，所以数据的处理会不同
pictureupload.vue:
<template>
<div class="pictureupload">
<el-upload
:action="baseUrl + '/api/public/image'"
list-type="picture-card"
:on-preview="handlePictureCardPreview"
:on-remove="handleRemove"
:file-list="fileList"
:on-exceed="handleExceed"
:before-remove="beforeRemove"
name="img"
:on-success="upLoadSuccess"
:data="upLoadData"
:headers="headers"
:limit="limit">
<i class="el-icon-plus"></i>
</el-upload>
<el-dialog :visible.sync="dialogVisible">
<img width="100%" :src="dialogImageUrl" alt="">
</el-dialog>
</div>
</template>
<script>
import { getToken } from "@/utils/auth";
import store from "@/store";
export default {
props: {
imgList: {
type: Array,
default: []
}, // 父组件传递的图片列表
limit: "" // 图片数量限制
},
data() {
return {
fileList: [],
upLoadData: {
img: ""
},
baseUrl: process.env.BASE_API,
dialogVisible: false,
dialogImageUrl: "",
headers: {
Authorization: store.getters.token_type + " " + store.getters.token
} // 接口调用token
};
},
watch: {
// 监听imgList的变化： fileList要求的格式为[{url: img}],所以监听imgList变化后将其进行处理，赋值给fileList
imgList: {
handler(newValue, oldValue) {
if(newValue.length === 0) {
this.fileList = [];
return;
}
for (let i = 0; i < newValue.length; i++) {
if (oldValue[i] != newValue[i]) {
this.fileList = [];
newValue.forEach(el => {
this.fileList.push({url: el})
})
return;
}
}
},
deep: true
}
},
methods: {
// 图片移除时处理数据
handleRemove(file, fileList) {
let item = [];
fileList.forEach(el => {
item.push(el.url);
});
this.$emit("removeimg", item);
},
handlePictureCardPreview(file) {
this.dialogImageUrl = file.url;
this.dialogVisible = true;
},
// 判断图片数量
handleExceed(files, fileList) {
this.$message.warning(`当前限制选择 ${this.limit} 个文件，本次选择了 ${files.length} 个文件，共选择了 ${files.length + fileList.length} 个文件`);
},
beforeRemove(file, fileList) {},
// 上传图片成功事件
upLoadSuccess(response) {
this.$emit("uploadimg", response.message);
this.$message("上传成功",);
}
},
mounted() {
if (this.imgList.length != 0) {
this.imgList.forEach(el => {
this.fileList.push({ url: el });
});
}
}
};
</script>
使用上传图片组件：
<pictureupload @uploadimg="uploadimg" :imgList="ruleForm.img" :limit="3" @removeimg="removeimg"></pictureupload>
removeimg(item) {
this.ruleForm.img = item;
},
uploadimg(item) {
this.ruleForm.img.push(item);
},
希望本文所述对大家vue.js程序设计有所帮助。
