使用iView Upload 组件实现手动上传图片的示例代码

<template>  <div class="demo-upload-list" v-for="item in uploadList">    <template v-if="item.status === 'finished'">      ![](item.url)      <div class="demo-upload-list-cover">        <Icon type="ios-eye-outline" @click.native="handleView(item.name)"></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>  <Upload    ref="upload"    :show-upload-list="false"    :default-file-list="defaultList"    :on-success="handleSuccess"    :format="['jpg','jpeg','png']"    :max-size="2048"    :on-format-error="handleFormatError"    :on-exceeded-size="handleMaxSize"    :before-upload="handleBeforeUpload"    multiple    type="drag"    action="//jsonplaceholder.typicode.com/posts/"    style="display: inline-block;width:58px;">    <div style="width: 58px;height:58px;line-height: 58px;">      <Icon type="camera" size="20"></Icon>    </div>  </Upload>  <Modal title="查看图片" v-model="visible">    ![]('https://o5wwk8baw.qnssl.com/' + imgName + '/large')  </Modal></template><script>  export default {    data () {      return {        defaultList: [          {            'name': 'a42bdcc1178e62b4694c830f028db5c0',            'url': 'https://o5wwk8baw.qnssl.com/a42bdcc1178e62b4694c830f028db5c0/avatar'          },          {            'name': 'bc7521e033abdd1e92222d733590f104',            'url': 'https://o5wwk8baw.qnssl.com/bc7521e033abdd1e92222d733590f104/avatar'          }        ],        imgName: '',        visible: false,        uploadList: []      }    },    methods: {      handleView (name) {        this.imgName = name;        this.visible = true;      },      handleRemove (file) {        // 从 upload 实例删除数据        const fileList = this.$refs.upload.fileList;        this.$refs.upload.fileList.splice(fileList.indexOf(file), 1);      },      handleSuccess (res, file) {        // 因为上传过程为实例，这里模拟添加 url        file.url = 'https://o5wwk8baw.qnssl.com/7eb99afb9d5f317c912f08b5212fd69a/avatar';        file.name = '7eb99afb9d5f317c912f08b5212fd69a';      },      handleFormatError (file) {        this.$Notice.warning({          title: '文件格式不正确',          desc: '文件 ' + file.name + ' 格式不正确，请上传 jpg 或 png 格式的图片。'        });      },      handleMaxSize (file) {        this.$Notice.warning({          title: '超出文件大小限制',          desc: '文件 ' + file.name + ' 太大，不能超过 2M。'        });      },      handleBeforeUpload () {        const check = this.uploadList.length < 5;        if (!check) {          this.$Notice.warning({            title: '最多只能上传 5 张图片。'          });        }        return check;      }    },    mounted () {      this.uploadList = this.$refs.upload.fileList;    }  }</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,.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,.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;  }</style>

<template>  <div>    <div class="demo-upload-list" v-for="item in uploadList">      ![](item.url)      <div class="demo-upload-list-cover">        <Icon type="ios-trash-outline" @click.native="handleRemove(item)"></Icon>      </div>    </div>    <Upload ref="upload" :show-upload-list="false" :format="['jpg','jpeg','png']" :max-size="2048" :before-upload="handleBeforeUpload" :on-format-error="handleFormatError" :on-exceeded-size="handleMaxSize" type="drag" action="//jsonplaceholder.typicode.com/posts/" style="display: inline-block;width:58px;">      <div style="width: 58px;height:58px;line-height: 58px;">        <Icon type="camera" size="20"></Icon>      </div>    </Upload>  </div></template><script>export default { methods: {  data(){    return {      uploadList: []    }  },  handleBeforeUpload(file) {    // 创建一个 FileReader 对象    let reader = new FileReader()    // readAsDataURL 方法用于读取指定 Blob 或 File 的内容    // 当读操作完成，readyState 变为 DONE，loadend 被触发，此时 result 属性包含数据：URL（以 base64 编码的字符串表示文件的数据）    // 读取文件作为 URL 可访问地址    reader.readAsDataURL(file)    const _this = this    reader.onloadend = function (e) {      file.url = reader.result      _this.uploadList.push(file)    }  },  handleRemove(file) {    this.uploadList.splice(this.uploadList.indexOf(file), 1)  },  handleFormatError(file) {   this.$Notice.warning({    title: '文件格式不正确',    desc: '文件 ' + file.name + ' 格式不正确，请上传 jpg 或 png 格式的图片。'   })  },  handleMaxSize(file) {   this.$Notice.warning({    title: '超出文件大小限制',    desc: '文件 ' + file.name + ' 太大，不能超过 2M。'   })  } }}</script><style scoped>.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, .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, .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;}.ivu-icon {  line-height: 58px;}</style>