vue+element 上传图片控件

<template>
    <div>
        <el-upload
            action="#"
            :style="fileList.length===0?'margin:10px;':'margin-top: 10px;'"
            list-type="picture-card"
            :on-change="uploadChange"
            :limit="1"
            :on-exceed="handleExceed"
            :file-list="fileList"
            :auto-upload="false">
            <i slot="default" class="el-icon-plus"></i>
            <div slot="file" slot-scope="{file}">
                <img
                    class="el-upload-list__item-thumbnail"
                    :src="file.url" alt="">
                <span class="el-upload-list__item-actions">
                                            <span
                                                class="el-upload-list__item-preview"
                                                @click="handlePictureCardPreview(file)">
                                              <i class="el-icon-zoom-in"></i>
                                            </span>
                                            <span
                                                v-if="!disabled"
                                                class="el-upload-list__item-delete"
                                                @click="handleRemove(file)">
                                              <i class="el-icon-delete"></i>
                                            </span>
                                        </span>
            </div>
        </el-upload>

        <el-dialog :visible.sync="dialogVisible" :append-to-body="true">
            <img width="100%" :src="dialogImageUrl" alt="">
        </el-dialog>
    </div>
</template>

<script>
    import {addGoodsInfo} from "@/api/request";

    export default {
        name: "upload-template",
        data() {
            return {
                fileList: [],
                imageFileData: '',
                dialogImageUrl: '',
                dialogVisible: false,
                disabled: false
            }
        },
        mounted() {
            if (this.fileList.length > 0) {
                document.getElementsByClassName("el-upload el-upload--picture-card")[0].style.display = "none";
            }
        },
        methods: {
            uploadChange(file) {
                this.imageFileData = file.raw;
                this.fileList.push({name: file.name, url: file.url});
                if (this.fileList.length > 0) {
                    document.getElementsByClassName("el-upload el-upload--picture-card")[0].style.display = "none";
                }
            },
            handleExceed() {
                this.$message.warning("只能上传一个图片");
            },
            handlePictureCardPreview(file) {
                this.dialogImageUrl = file.url;
                this.dialogVisible = true;
            },
            handleRemove(file) {
                this.fileList.forEach((v, index) => {
                    if (file.name === v.name && file.url === v.url) {
                        this.fileList.splice(index, 1);
                    }
                });
                if (this.fileList.length === 0) {
                    document.getElementsByClassName("el-upload el-upload--picture-card")[0].style.display = "";
                }
            },
            save() {
                let param = new FormData();  // 创建form对象
                param.append('file', this.imageFileData);  // 通过append向form对象添加数据
                param.append('goodsInfo', JSON.stringify(this.goodsInfo)); // 添加form表单中其他数据
                addGoodsInfo(param).then(res => {
                    if (res === 'success') {
                        this.clearForm();
                        this.closeForm();
                    }
                })
            }
        }
    }
</script>

<style scoped>

</style>