


Brief introduction: Implement the authorized login function of the mini program
本篇文章给大家带来了关于微信小程序的相关知识,其中主要介绍了怎么实现小程序授权登录功能的相关内容,下面一起来看一下,希望对大家有帮助。
【相关学习推荐:小程序学习教程】
在我们平时工作、学习、生活中,微信小程序已成为我们密不可分的一部分,我们仔细留意下,每当我们使用一个新的小程序时,总会遇到如下页面:
这便是微信小程序授权登录功能了,授权登录后,我们就可以正常使用小程序,而小程序也会获取到我们的用户权益,手机号等个人信息
授权登录功能剖析
微信小程序的授权登录具体步骤如下所示
具体实现主要有以下三个步骤:
调用wx.login() 微信api获取临时登录凭证code,并回传到开发者服务器
调用auth.code2Session 微信api接口,获取用户唯一标识OpenID、 用户在微信开放平台帐号下的唯一标识UnionID和会话密钥session_key
通过步骤2获取的参数进行解密操作,获取用户手机号,头像等特性,并把需要的数据保存到缓存中
步骤实现代码如下:
一、获取临时登录凭证code
由于微信官方修改了getUserInfo接口,现在无法实现一进入微信小程序就会自动弹出授权窗口,所以我们只能通过button按钮让用户手动触发
我们先写一个简单的弹框,用isShow变量控制,isShow取决于步骤3中的缓存信息,当所有步骤都走通,会正确缓存用户信息,此时弹框隐藏,否则弹框都为显示状态
<view> <view> <text>需要先授权获取个人信息</text> <button>微信账号快速授权</button> </view> </view>
点击按钮时,调用getUserInfo方法,isShow设置为false,同时使用wx.login获取到登录凭证code
getUserInfo:e=>{ this.setData({ isShow:false }) wx.login({ success: function (res) { let code = res.code // 登录凭证code } }) }
二、根据登录凭证code,获取用户登录信息
拿到登录凭证code后,调用auth.code2Session 微信api接口(此处为服务端操作,后端大佬搞定,我们直接调用他给的接口就好)
wx.request({ url: 获取用户信息的auth.code2Session微信api接口, method: 'POST', data:{ code:code//登录凭证code }, header: { 'content-type': 'application/json;charset=UTF-8' }, success: function (res) { var userphone= res.data.data //解密手机号 var msg = e.detail.errMsg; var sessionKey = userphone.session_key;//会话密钥 var encryptedData=e.detail.encryptedData; //签名 var unionid = userphone.unionid//唯一标识 var iv= e.detail.iv; //授权成功 if (msg == 'getPhoneNumber:ok') { wx.checkSession({ success:function(){ //进行请求服务端解密手机号 this.deciyption(sessionKey,encryptedData,iv,unionid); } }) } } }) } })
此时大多数用户信息我们已经获取了,但用户手机号,用户头像等信息还处于加密状态,我们需要去解密获取这些参数
三、根据用户信息,解密获取用户手机号
deciyption(sessionKey,encryptedData,iv,unionid){ var that = this; wx.request({ url: 解密接口, method: 'POST', data: { sessionKey: sessionKey, encryptedData:encryptedData, iv: iv }, header: { 'content-type': 'application/json;charset=UTF-8' }, success: function(res) { let data = res.data if (data.resultCode == 'success') { wx.setStorageSync('userTel', data.data.phoneNumber);//存储解密后的用户手机号 }else{ wx.showToast({ title: '获取信息失败请重新授权', icon: 'none' }) that.setData({ isShow:true }) } }, fail:function(res) { wx.showToast({ title: '获取失败请重新授权', icon: 'none' }) that.setData({ isShow:true }) } }) },
此时授权登录功能已完成
【相关学习推荐:小程序学习教程】
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