menduner-uniapp/utils/preview.js

// 允许打开的文件类型
const typeList = ['doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx', 'pdf']

// 文件预览
export function preview (url) {
  uni.showLoading({
    title: '文件加载中...'
  })
  wx.downloadFile({
    url,
    success: function (res) {
      const filePath = res.tempFilePath
      const arr = res.tempFilePath.split('.')
      const fileType = arr[1]
      if (!typeList.includes(fileType)) {
        uni.showToast({
          icon: "none",
          title: '暂未支持此类型的文件查看',
          duration: 2000,
        })
        return
      } 
      wx.openDocument({
        filePath: filePath,
        fileType,
        showMenu: true, //显示右上角菜单
        success: function (res) {
          console.log(res, "openDocument")
          console.log("打开文档成功")
        },
        fail: res => {
          uni.showToast({
            icon: 'none',
            title: res.errMsg,
            duration: 5000
          })
        }
      })
    },
    fail: (res) => {
      uni.showToast({
        icon: 'none',
        title: res.errMsg,
        duration: 5000
      })
    },
    complete: res => {
      uni.hideLoading()
    }
  })
}