实现微信小程序之授权登录

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<view wx:if="{{canIUse}}">
    <view class='header'>
        <image src='/images/wx_login.png'></image>
    </view>
 
    <view class='content'>
        <view>申请获取以下权限</view>
        <text>获得你的公开信息(昵称，头像等)</text>
    </view>
 
    <button class='bottom' type='primary' open-type="getUserInfo" lang="zh_CN" bindgetuserinfo="bindGetUserInfo">
        授权登录
    </button>
</view>
 
<view wx:else>请升级微信版本</view>

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.header {
    margin: 90rpx 0 90rpx 50rpx;
    border-bottom: 1px solid #ccc;
    text-align: center;
    width: 650rpx;
    height: 300rpx;
    line-height: 450rpx;
}
 
.header image {
    width: 200rpx;
    height: 200rpx;
}
 
.content {
    margin-left: 50rpx;
    margin-bottom: 90rpx;
}
 
.content text {
    display: block;
    color: #9d9d9d;
    margin-top: 40rpx;
}
 
.bottom {
    border-radius: 80rpx;
    margin: 70rpx 50rpx;
    font-size: 35rpx;
}

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{

"navigationBarTitleText": "授权登录"

}

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Page({
    data: {
        //判断小程序的API，回调，参数，组件等是否在当前版本可用。
        canIUse: wx.canIUse('button.open-type.getUserInfo')
    },
    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) {
                            //从数据库获取用户信息
                            that.queryUsreInfo();
                            //用户已经授权过
                            wx.switchTab({
                                url: ''
                            })
                        }
                    });
                }
            }
        })
    },
    bindGetUserInfo: function (e) {
        if (e.detail.userInfo) {
            //用户按了允许授权按钮
            var that = this;
            //插入登录的用户的相关信息到数据库
            wx.request({
                url: getApp().globalData.urlPath + 'hstc_interface/insert_user',
                data: {
                    openid: getApp().globalData.openid,
                    nickName: e.detail.userInfo.nickName,
                    avatarUrl: e.detail.userInfo.avatarUrl,
                    province:e.detail.userInfo.province,
                    city: e.detail.userInfo.city
                },
                header: {
                    'content-type': 'application/json'
                },
                success: function (res) {
                    //从数据库获取用户信息
                    that.queryUsreInfo();
                    console.log("插入小程序登录用户信息成功！");
                }
            });
            //授权成功后，跳转进入小程序首页
            wx.switchTab({
                url: ''  
            })
        } else {
            //用户按了拒绝按钮
            wx.showModal({
                title:'警告',
                content:'您点击了拒绝授权，将无法进入小程序，请授权之后再进入!!!',
                showCancel:false,
                confirmText:'返回授权',
                success:function(res){
                    if (res.confirm) {
                        console.log('用户点击了“返回授权”')
                    } 
                }
            })
        }
    },
    //获取用户信息接口
    queryUsreInfo: function () {
        wx.request({
            url: getApp().globalData.urlPath + 'hstc_interface/queryByOpenid',
            data: {
                openid: getApp().globalData.openid
            },
            header: {
                'content-type': 'application/json'
            },
            success: function (res) {
                console.log(res.data);
                getApp().globalData.userInfo = res.data;
            }
        })；
    },
    
})