初始化

pages/index/index.js

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+//index.js
+//获取应用实例
+const app = getApp()
+
+Page({
+  data: {
+    motto: 'Hello World',
+    userInfo: {},
+    hasUserInfo: false,
+    canIUse: wx.canIUse('button.open-type.getUserInfo')
+  },
+  //事件处理函数
+  bindViewTap: function() {
+    wx.navigateTo({
+      url: '../logs/logs'
+    })
+  },
+  onLoad: function () {
+    if (app.globalData.userInfo) {
+      this.setData({
+        userInfo: app.globalData.userInfo,
+        hasUserInfo: true
+      })
+    } else if (this.data.canIUse){
+      // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回
+      // 所以此处加入 callback 以防止这种情况
+      app.userInfoReadyCallback = res => {
+        this.setData({
+          userInfo: res.userInfo,
+          hasUserInfo: true
+        })
+      }
+    } else {
+      // 在没有 open-type=getUserInfo 版本的兼容处理
+      wx.getUserInfo({
+        success: res => {
+          app.globalData.userInfo = res.userInfo
+          this.setData({
+            userInfo: res.userInfo,
+            hasUserInfo: true
+          })
+        }
+      })
+    }
+  },
+  getUserInfo: function(e) {
+    console.log(e)
+    app.globalData.userInfo = e.detail.userInfo
+    this.setData({
+      userInfo: e.detail.userInfo,
+      hasUserInfo: true
+    })
+  }
+})

pages/index/index.json

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+{
+  "usingComponents": {}
+}

pages/index/index.wxml

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+<!--index.wxml-->
+<view class="container">
+  <view class="userinfo">
+    <button wx:if="{{!hasUserInfo && canIUse}}" open-type="getUserInfo" bindgetuserinfo="getUserInfo"> 获取头像昵称 </button>
+    <block wx:else>
+      <image bindtap="bindViewTap" class="userinfo-avatar" src="{{userInfo.avatarUrl}}" mode="cover"></image>
+      <text class="userinfo-nickname">{{userInfo.nickName}}</text>
+    </block>
+  </view>
+  <view class="usermotto">
+    <text class="user-motto">{{motto}}</text>
+  </view>
+</view>

pages/index/index.wxss

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+/**index.wxss**/
+.userinfo {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.userinfo-avatar {
+  width: 128rpx;
+  height: 128rpx;
+  margin: 20rpx;
+  border-radius: 50%;
+}
+
+.userinfo-nickname {
+  color: #aaa;
+}
+
+.usermotto {
+  margin-top: 200px;
+}