<!-- 當已經(jīng)授權的時候 -->
<view wx:if="{{result == 'ok'}}" class="result">
 <view class="headimg">
  <image src="{{avatarUrl}}"></image>
 </view>
 <view class="nickname">{{nickName}}</view>
</view>
<!-- 當未授權的時候 -->
<view wx:else class="result">
<view>未授權</view>
<button wx:if="{{canIUse}}" open-type="getUserInfo" bindgetuserinfo="bindGetUserInfo">授權登錄</button>
</view>

Page({
 data: {
  canIUse: wx.canIUse('button.open-type.getUserInfo')
 },
 onLoad: function() {
  var that = this;
  // 查看是否授權
  wx.getSetting({
   success (res){
    if (res.authSetting['scope.userInfo']) {
     // 已經(jīng)授權，可以直接調(diào)用 getUserInfo 獲取頭像昵稱
     wx.getUserInfo({
      success: function(res) {
       console.log(res.userInfo)
       that.setData({
        result:'ok',// 結果
        nickName:res.userInfo.nickName,// 微信昵稱
        avatarUrl:res.userInfo.avatarUrl,// 微信頭像
       })
      }
     })
    }else{
     // 未授權，結果返回null
     that.setData({
      result:'null',// 結果
     })
    }
   }
  })
 },
 // 請求API授權，獲得用戶頭像和昵稱
 bindGetUserInfo (e) {
  console.log(e.detail.userInfo.nickName)
  var that = this;
  that.setData({
   result:'ok',// 結果
   nickName:e.detail.userInfo.nickName,// 微信昵稱
   avatarUrl:e.detail.userInfo.avatarUrl,// 微信頭像
  })
 }
})

button{
 margin:30px auto 0;
}
.result{
 width:200px;
 margin:20px auto;
 text-align: center;
}
.result .headimg{
 width:200px;
 height: 200px;
 border-radius: 100px;
 margin-bottom: 20px;
}
.result .headimg image{
 width:200px;
 height: 200px;
 border-radius: 100px;
}