code: function () {
              var _this = this;
  
              /* 滚动拉取图片 */
              domUtils.on($G('imageList'), 'scroll', function(e){
                  var panel = this;
                  if (panel.scrollHeight - (panel.offsetHeight + panel.scrollTop) < 10) {
                      _this.getImageData();
                  }
              });
              /* 选中图片 */
              domUtils.on(this.container, 'click', function (e) {
                  var target = e.target || e.srcElement,
                      li = target.parentNode;
  
                  if (li.tagName.toLowerCase() == 'li') {
                      if (domUtils.hasClass(li, 'selected')) {
                          domUtils.removeClasses(li, 'selected');
                      } else {
                          domUtils.addClass(li, 'selected');
                      }
                  }
              });
          }
docs: /* 初始化滚动事件,滚动到地步自动拉取数据