h5下载调用接口，文件流，但是嵌套在ios里面可以下载，安卓不能

接口方式

export const downloadApi = (filePath,announceId) => {
  return http.get('xxxxxxx后台接口地址',{filePath,announceId},{responseType: 'blob'})
}

下载的方法
html

<div class="append" v-if="contentDetail.announceAppendixList!=null">
   <div class="append_title">
     <div class="uploadName">附件:</div>
     <div class="append_detail_box">
       <div class="append_detail yto-font-primary-color" v-for="(append,index) in contentDetail.announceAppendixList.announceAppendixList" :key="index" @click="downLoad(append)">
         {{append.appendixName}}
       </div>
     </div>
   </div>
 </div>

下载的方法

downLoad(append) {
      downloadApi(append.appendixPath,this.announceId).then(res => 
        this.downloadFile(res.data,append.appendixName)
      }) 
    },
    downloadFile(content, fileName) {
      (fileName && fileName.indexOf('.') !== -1) && (fileName = fileName.slice(0, fileName.indexOf('.')));
      const blob = new Blob([content], {
        type: content.type
      })
      const url = window.URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.style.display = 'none';
      a.href = url;
      a.download = fileName;
      document.body.appendChild(a);
      a.click();
      setTimeout(() => {
        window.URL.revokeObjectURL(url);
        document.body.removeChild(a);
      }, 10);
    },