请问是需要小程序上线或者非个人小程序，还是代码有问题？

    const currentQr = this.data.qrCodes[this.data.currentQrIndex]
    if (currentQr) {
      // 生成临时图片
      const base64Data = currentQr.inviteCode
      const fsm = wx.getFileSystemManager()
      const times = new Date().getTime();
      const FILE_PATH = `${wx.env.USER_DATA_PATH}/${times}.png`
      const that = this;
      fsm.writeFile({
        filePath: FILE_PATH,
        data:base64Data,
        encoding: 'base64',
        success:(res) => {
          console.log(FILE_PATH)
          console.log(res)
        }
      })
      wx.downloadFile({
        url: FILE_PATH,
        success:(res) => {
          wx.showShareImageMenu({
            path: res.tempFilePath,
          })
        }
      })