小程序解析二维码带的上级ID

onLaunch: function(options) {
    // 展示本地存储能力
    var that = this;
    var logs = wx.getStorageSync('logs') || []
    var first_leader = 0;
    if (options.query.first_leader != '' && options.query.first_leader != undefined) {
      first_leader = options.query.first_leader;
    }
    // 二维码链接获取参数tid
    if (first_leader == 0) {
      console.log('options');
      console.log(options);
      console.log(options.query.q)
      var qr_url = '';
      if (options.query.q) {
        var qr_url = decodeURIComponent(options.query.q);
        console.log('qr_url:' + qr_url);
        var index = qr_url.lastIndexOf("=");
        console.log('index1:' + index);
        var param = qr_url.substring(index + 1, qr_url.length);
        first_leader = param;
      }
    }
    wx.setStorageSync('first_leader', first_leader)
}