微信小程序 宠物论坛1[通俗易懂]

//index.js
//获取应用实例
const app = getApp()
const db = wx.cloud.database()
Page({
data: {
motto: '欢迎来到宠物论坛',
userInfo: {},
nickname:"",
heads:"",
hasUserInfo: false,
canIUse: wx.canIUse('button.open-type.getUserInfo')
},
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,
heads:res.userInfo.avatarUrl,
nickname:res.userInfo.nickName,
hasUserInfo: true
})
//  console.log(this.data.heads)
//  console.log(this.data.nickname)
}
} 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,
heads: res.userInfo.avatarUrl,
hasUserInfo: true
})
}
})
}
// 获取用户openid
wx.cloud.callFunction({
name: "getopenid",
success: res => {
console.log(res.result.openid)
//  this.setData({
//    openid: res.result.openid
//  })
console.log(res.result.openid)
this.setData({
openid1: res.result.openid
})
console.log("openid1的值为："+this.data.openid1)
},
fail(res) {
console.log("获取openid失败")
}
})
// 获取用户的openid，然后对比数据库，如果是老用户直接跳转
const db = wx.cloud.database();
db.collection('user').
where({
_openid: this.data.openid1
})
.get({
success: function (res) {
console.log("查询成功")
console.log(res.data)
if(res.data!=''){
wx.reLaunch({
url: '../mine/mine?id=openid1'
})
}
console.log("openid2的值为："+res.data[0]._openid)
this.setData({
openid2:res.data[0]._openid
})
}
})
// if (this.data.openid1 == this.data.openid2) (
//   wx.reLaunch({
//     url: '../mine/mine?id=openid1'
//   })
// )
},
getUserInfo: function (e) {
console.log(e)
app.globalData.userInfo = e.detail.userInfo
this.setData({
userInfo: e.detail.userInfo,
heads: e.userInfo.avatarUrl,
hasUserInfo: true
})
},
//如果是新用户 点击头像处理函数
bindViewTap: function () {
const heads=this.data.heads
const nickname=this.data.nickname
db.collection('user').add({
data: {
nickname:nickname,
heads:heads
},
success: function (res) {
this.setData({
openid:res._openid
})
}
})
const openid=this.data.openid
wx.reLaunch({
url: '../mine/mine?id=openid'
})
},
})

<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>

/**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;
}