import { WxCode , WxLogin } from '@/api/user.js'
        WxCode({
            callback_url: 'http://m.test.com/#/pages/index/wxlogin' //回调地址
        }).then(data => {
            location.href=data;
            // console.log(data);
        })
        import { WxCode , WxLogin } from '@/api/user.js'
    export default {
        data() {
            return {
                code:''
            }
        },
        methods: {
            getUrlParam(name) {
                var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)')
                var r = window.location.search.substr(1).match(reg)
                if (r != null) return unescape(r[2])
                return null
            },
            getRequestParams(name) {
                let url = location.href;
                let requestParams = {};
                if (url.indexOf('?') !== -1) {
                    let str = url.substr(url.indexOf('?') + 1); //截取?后面的内容作为字符串
                    // console.log(str, '?后面的内容');
                    let strs = str.split('&'); //将字符串内容以&分隔为一个数组
                    // console.log(strs, '以&切割的数组');
                    for (let i = 0; i < strs.length; i++) {
                        requestParams[strs[i].split('=')[0]] = decodeURI(strs[i].split('=')[1]);
                        // 将数组元素中'='左边的内容作为对象的属性名，'='右边的内容作为对象对应属性的属性值
                    }
                }
                // console.log(requestParams, '处理后的对象');
                if(name){
                    return requestParams[name];
                }else{
                    return requestParams;
                }
            },
            wxlogin(){
                WxLogin({
                    code: this.code
                }).then(data => {
                    console.log(data);
                    uni.setStorageSync('token', data.userinfo.token)
                    uni.redirectTo({
                        url:'/pages/evaluate/index'
                    });
                })
            }
        },
        created(){
            // this.code=this.getUrlParam('cdoe');
            // console.log(this.code);
        },
        onLoad(options) {
            this.code=this.getUrlParam('code');
            console.log(this.code);
            this.wxlogin();
        }
    }

返回code 链接
getUrlParam：m.test.com/?code=hZVwoVJCy8cIqBFTNEPmUvpG_csDDL7X9gE799M07PY&state=1#/pages/index/wxlogin

getRequestParams:m.test.com/#/?state=1    getRequestParams('state');