code: function() {
          if (this.options.draggable) {
              this.draggable.destroy();
          }
          this.$container.off('click.bizDialog');
          this.$container.find('.biz-dialog-bottom button').bizButton('destroy').off();
          this.$mask.remove();
          this.$container.remove();
          this.$main.data(dataKey, null);
      }
docs: 销毁