code: function scTouchEvt(e) {
              var $cur = $(e.currentTarget),
                  cs = ['brand', 'msort', 'color', 'size', 'price', 'discount'],
                  curType;
  
              if ($cur.hasClass('active')) {
                  return;
              }
  
              $('#screen-content .c-item').removeClass('active');
              $cur.addClass('active');
  
              curType = _.filter(cs, function(c) {
                  return $cur.hasClass(c);
              });
  
              $('.sub-classify:not(.hide)').addClass('hide');
              $('#sub-' + curType).removeClass('hide');
          }
docs: 筛选分类点击事件句柄