修正 banner swiper Dom

@@ -173,7 +173,7 @@ function ajaxResource() {
 
     $('.banner-center-swiper').each(function() {
         if ($(this).find('li').length > 1) {
-            new Swiper('.banner-center-swiper', {
+            new Swiper(this, {
                 preloadImages: false,
                 lazyLoading: true,
                 lazyLoadingInPrevNext: true,
@@ -185,8 +185,6 @@ function ajaxResource() {
                 slideElement: 'li',
                 pagination: '.banner-center .pagination-inner',
             });
-        } else {
-            $(this).unbind();
         }
     });