使用iview Upload进行多文件上传，编辑页初始已上传的图片失败的问题

Posted 2021-02-28 ouyangxiaoyao

以下是组件代码，重点部分在watch中，

<!--
  传参 ：mutileUploadData={
    defaultList:Array,初始图片
    format:Array,[‘jpg‘,‘jpeg‘,‘png‘],
    actionUrl:// 必填_接口地址
    maxSize:‘1024‘//最大尺寸
    maxNum:2//上传的个数
   }
   事件 @get-upload-Image 返回所有上传图片的url地址list
    -->
<template>
  <div>
    <div class="demo-upload-list" v-for="item in uploadList" :key="item.url">
      <template v-if="item.status === ‘finished‘">
        <img :src="item.url" />
        <div class="demo-upload-list-cover">
          <Icon
            type="ios-eye-outline"
            @click.native="handleView(item.url)"
          ></Icon>
          <Icon
            type="ios-trash-outline"
            @click.native="handleRemove(item)"
          ></Icon>
        </div>
      </template>
      <template v-else>
        <Progress
          v-if="item.showProgress"
          :percent="item.percentage"
          hide-info
        ></Progress>
      </template>
    </div>
    <!--
      :default-file-list="defaultImageList"
      -->
    <Upload
      class="mutile-upload"
      ref="upload"
      :show-upload-list="false"
      :default-file-list="mutileUploadData.defaultList"
      :on-success="handleSuccess"
      :on-error="uploadError"
      :format="mutileUploadData.format"
      :max-size="mutileUploadData.maxSize"
      :on-format-error="handleFormatError"
      :on-exceeded-size="handleMaxSize"
      :before-upload="handleBeforeUpload"
      :data="mutileUploadData.actionParams"
      multiple
      type="drag"
      :action="action"
      style="display:
      inline-block;width:58px;"
    >
      <div class="cameraDefault">
        <Icon type="ios-camera" size="20"></Icon>
      </div>
    </Upload>
    <Modal title="View Image" v-model="visible" footer-hide>
      <img :src="imgName" v-if="visible" style="width: 100%" />
    </Modal>
  </div>
</template>
<script>
export default {
  props: { mutileUploadData: Object },

  data() {
    return {
      imgName: "",
      visible: false,
      uploadList: [],
      baseUrl: process.env.VUE_APP_BASE_API,
    };
  },
  computed: {
    action: function() {
      let url = this.baseUrl + this.mutileUploadData.actionUrl;
      return url;
    },
    fileSize: function() {
      return parseInt(this.mutileUploadData.maxSize / 1024) + "M";
    },
    fileType: function() {
      return this.mutileUploadData.format.join(",");
    },
  },
  methods: {
    handleView(name) {
      this.imgName = name;
      this.visible = true;
    },
    handleRemove(file) {
      this.$Modal.confirm({
        title: "请注意",
        content: "您确定要删除吗？",
        onOk: () => {
          const fileList = this.$refs.upload.fileList;
          this.$refs.upload.fileList.splice(fileList.indexOf(file), 1);
        },
      });
    },
    handleSuccess(res, file) {if (res && res.success) {
        file.url = res.data.Path;
        file.name = res.data.FileName;

          this.uploadList.push({

         　　 name: file.name,

         　　 url: file.url,

         　　 showProgress: false,

          　　status: "finished",

        });

      } else {
        this.$Message.info(res.message);
      }
    },
    uploadError() {
      this.$Modal.error({
        title: "操作失败",
        content: "网络请求失败",
        onOk() {},
      });
    },
    handleFormatError(file) {
      this.$Modal.warning({
        title: "格式错误",
        content:
          "文件 " +
          file.name +
          " 格式不正确，只支持" +
          this.fileType +
          "格式的文件。",
        onOk() {
          this.$nextTick(() => {});
        },
      });
    },
    handleMaxSize(file) {
      this.$Modal.warning({
        title: "文件过大",
        content: "文件 " + file.name + " 太大，不能超过" + this.fileSize + "。",
        onOk() {},
      });
    },
    handleBeforeUpload() {
      const check = this.uploadList.length < this.mutileUploadData.maxNum;
      if (!check) {
        this.$Notice.warning({
          title: "最多上传" + this.mutileUploadData.maxNum + "张",
        });
      }
      return check;
    },
  },
  mounted() {
    this.uploadList = this.$refs.upload.fileList;
  },
  watch: {
    uploadList: {
      handler(val) {
        let tempList = [];
        val.forEach((element) => {
          tempList.push(element.url);
        });
        this.$emit("get-upload-Image", tempList);
      },
      deep: true,
    },
    "mutileUploadData.defaultList": {
      handler(val) {
        this.uploadList.splice(0, this.uploadList.length); //清空数组
        val.forEach((element) => {
          this.uploadList.push({
            name: element.name,
            url: element.url,
            showProgress: false,
            status: "finished",
          });
        });
      },
      deep: true,
    }
  },
};
</script>
<style>
.demo-upload-list {
  display: inline-block;
  width: 60px;
  height: 60px;
  text-align: center;
  line-height: 60px;
  border: 1px solid transparent;
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
  position: relative;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
  margin-right: 4px;
}
.demo-upload-list img {
  width: 100%;
  height: 100%;
}
.demo-upload-list-cover {
  display: none;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.6);
}
.demo-upload-list:hover .demo-upload-list-cover {
  display: block;
}
.demo-upload-list-cover i {
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  margin: 0 2px;
}
.mutile-upload {
  display: inline-block !important;
}
.cameraDefault {
  width: 58px;
  height: 58px;
  line-height: 58px;
}
</style>

实现效果