小程序码.js

const generateQR = data => new Promise((resolve, reject) => {
  wx.downloadFile({
    url: `https://XXXX/wxacodeunlimit?data=${encodeURI(JSON.stringify(data))}`,
    success: res => {
      console.log(res)
      resolve(res.tempFilePath)
    },
    fail: () => {
      reject()
    },
  })
})