【微信小程序】如何获取用户绑定手机号

用户调用wx.login()方法，获取登录用户凭证code

wx.login({
 success: function(res) {
  console.log('loginCode', res.code)
 }
});

code传给后台，凭证code获取session_key和openid

https://api.weixin.qq.com/sns/jscode2session?appid=APPID&secret=SECRET&js_code=JSCODE&grant_type=authorization_code

后台会获的用户的openid和session_key
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getPhoneNumber组件
拿到encryptedData和iv

<button open-type="getPhoneNumber" bindgetphonenumber="getPhoneNumber"></button>

Page({
 getPhoneNumber: function(e) {
  console.log(e.detail.errMsg)
  console.log(e.detail.iv)
  console.log(e.detail.encryptedData)
 }
})

将encryptedData和iv传给后台

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