小程序解析二维码scene参数

var list = decodeURIComponent(opt.scene)
let Code = this.getQueryValue(list,'Code')

getQueryValue(query, queryName) {
    const reg = new RegExp("(^|&)" + queryName + "=([^&]*)(&|$)", "i");
    const r = query.match(reg);
    if (r !== null){
      return r[2];
    } else {
      return null;
    }
  },