微信小程序的授权实现过程解析

<view class='modal-mask' wx:if='{{show}}' bindtap='clickMask'>
 <view class='modal-content'>
  <scroll-view scroll-y class='main-content'>
   <slot></slot>
  </scroll-view>
 </view>
</view>

n: fixed;
 left: 0;
 right: 0;
 top: 0;
 bottom: 0;
 background-color: rgba(0,0,0,0.5);
 z-index: 999;
}
/*遮罩内容*/
.modal-content{
 display: flex;
 flex-direction: column;
 width: 65%;
 background-color: #fff;
 border-radius: 10rpx;
 padding: 20rpx;
 text-align: center;
}
/*中间内容*/
.main-content{
 flex: 1;
 height: 100%;
 overflow-y: hidden; 
 max-height: 80vh; /* 内容高度最高80vh 以免内容太多溢出*/
}
.bottom {
  border-radius: 80rpx;
  margin: 70rpx 50rpx;
  font-size: 35rpx;
}

Component({
 /**
  * 组件的属性列表
  */
 properties: {
  //是否显示modal弹窗
  show: {
   type: Boolean,
   value: false
  },
  //控制底部是一个按钮还是两个按钮，默认两个
  single: {
   type: Boolean,
   value: false
  }
 },

 /**
  * 组件的初始数据
  */
 data: {

 },

 /**
  * 组件的方法列表
  */
 methods: {
  // 点击modal的回调函数
  clickMask() {
   // 点击modal背景关闭遮罩层，如果不需要注释掉即可
   this.setData({ show: false })
  },
  // 点击取消按钮的回调函数
  cancel() {
   this.setData({ show: false })
   this.triggerEvent('cancel') //triggerEvent触发事件
  },
  // 点击确定按钮的回调函数
  confirm() {
   this.setData({ show: false })
   this.triggerEvent('confirm')
  }
 }
})

{
 "component": true,
 "usingComponents": {}
}

<!-- modal弹窗-->
 <modalView show="{{showModal}}" bindcancel="modalCancel" bindconfirm='modalConfirm' single='{{single}}'>
  <view class='modal-content'>
   <scroll-view scroll-y class='main-content'>
  <view wx:if="{{canIUse}}" >
  <view class='header'>
      <text>提示</text>
    </view>
    <view class='content'>
     <image src="/images/goods_img2.png"></image>
     <text>是否登录并继续使用该程序</text>
    </view>
    <view class="header_title">
     <text class="dian">•</text>
     <text>登录程序需进行微信授权</text>
    </view>
    <view class="modal_footer">
    <view class="bottom">
     <button class='bottom_a'>
      拒绝
     </button>
     <button class='bottom_b' open-type="getUserInfo" lang="zh_CN" bindgetuserinfo="bindGetUserInfo">
       去登录
     </button>
    </view>
    </view>
</view>
   </scroll-view>
  </view>
 </modalView>

.header {
  text-align: start;
  height: 100rpx;
  line-height: 100rpx;
}
 
.header image {
  width: 200rpx;
  height: 200rpx;
}
 
.content {
 display: flex;
 margin-left: 50rpx;
 height: 100rpx;
 line-height: 100rpx;
}

.content image{
 width: 100rpx;
 height: 100rpx;
}
 
.content text {
 font-size: 24rpx;
 margin-left: 20rpx;
}
 
.header_title{
 margin-left: 50rpx;
 text-align: start;
 font-size: 24rpx;
 color: #ccc;
 line-height: 100rpx;
 display: flex;
}

.dian{
 margin-right: 6rpx;
 font-size: 36rpx;
}

.modal_footer{
  display: flex;
  justify-content: flex-end;
}
.bottom {
 display: flex;
  color: #ccc;
 font-size: 24rpx;
 width: 280rpx;
}

button::after {
 border: none;
}

.bottom button{
 background-color: #fff;
 height: 50rpx;
 line-height: 50rpx;
}

.bottom_a{
 font-size: 24rpx;
}
.bottom_b{
 font-size: 28rpx;
 color: #0db95a;
}

//home.js
//获取应用实例
const app = getApp()

Page({
 data: {
  canIUse: wx.canIUse('button.open-type.getUserInfo'),
  showModal: true, 
  single: false
 },
 onLoad:function(){
  var that = this;
  // 查看是否授权
  wx.getSetting({
   success: function (res) {
    if (res.authSetting['scope.userInfo']) {
     wx.getUserInfo({
      success: function (res) {
       wx.login({
        success: res => {
         console.log("用户的code:" + res.code);
        }
       });
      }
     });
    } else {
     that.setData({
      showModal: true
     });
    }
   }
  });
 },
 bindGetUserInfo: function (e) {
  if (e.detail.userInfo) {
   //用户按了允许授权按钮
   var that = this;
   // 获取到用户的信息了，打印到控制台上看下
   console.log("用户的信息如下：");
   console.log(e.detail.userInfo);
   //授权成功后,通过改变 showModal的值，让实现页面显示出来，把授权页面隐藏起来
   that.setData({
    showModal: false
   });
  } else {
   var that = this;
   //用户按了拒绝按钮
   wx.showModal({
    title: '警告',
    content: '您点击了拒绝授权，将无法获取你的信息!!!',
    showCancel: false,
    confirmText: '返回授权',
    success: function (res) {
     // 用户没有授权成功，不需要改变 isHide 的值
     if (res.confirm) {
      that.setData({
       showModal: true
      });
     }
    }
   });
  }
 }
})

{
 "usingComponents": {
  "modalView": "../../components/modal/modal"
 }
}