查看PDF

 wx.downloadFile({
        url: path,
        success(res) {
          const downloadPath = res.tempFilePath
          console.log('downloadPath =>', downloadPath)
          wx.openDocument({
            filePath: downloadPath,
            fileType: 'pdf',
            success(res) {
              console.log('打开文档成功 =>', res)
            },
            fail (err) {
              console.log('打开失败 =>', err)
            }
          })
        }
      })