const app = getApp()

const file = '../image/1234.png'

Page({

  data: {

​

  },

  onLoad: function () {

    const fs = wx.getFileSystemManager()

    fs.mkdir({

      dirPath:`${wx.env.USER_DATA_PATH}/test`,

      recursive: true,

      success: res => {

        console.log(res);

      }

    });

    fs.writeFileSync(`${wx.env.USER_DATA_PATH}/test/1234.txt`, "test", "utf-8");

    try {

      let content = fs.readFileSync(`${wx.env.USER_DATA_PATH}/test/1234.txt`)

      console.log(content)

    } catch( err) {

      console.log(err)

    }

  },

})