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:
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<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。
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