https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=ACCESS_TOKEN 

<button open-type="getPhoneNumber" bindgetphonenumber="getPhoneNumber"></button>
Page({
  getPhoneNumber (e) {
    console.log(e.detail.code)
  }
})

这个detail里面根本就获取不到code呢 只有encryptedData、errMsg、iv这三个属性