修复轮播图换位置问题

src/pages/home/rotation.vue

@@ -146,11 +146,11 @@ export default {
       let currentItem = item;
       let preCurrentItem = {};
       let nextCurrentItem = {};
-      if(currentItem.sort === 1) {
+      if(index === 0) {
           preCurrentItem = this.dataList[this.dataList.length-1];
           nextCurrentItem = this.dataList.filter(e=>e.sort === this.dataList[index+1].sort)[0];
       }
-      else if(index===4) {
+      else if(index === len-1) {
           preCurrentItem = this.dataList.filter(e=>e.sort === this.dataList[index-1].sort)[0];
           nextCurrentItem = this.dataList[0];
       } else {