上翻页有问题

src/views/IM/search-message/detail.vue

@@ -185,14 +185,16 @@ export default {
 						arr = this.dataconcatHandle(res.data.reverse());
 						this.detailData.unshift(...arr);
 						this.$forceUpdate();
-						if(param == 1) {
 						this.$nextTick( () => {
 							setTimeout(() => {
 								let el = this.getElmByID('scroll-set');
+								if(param == 1) {
 									el.scrollTop = 20000;
+								} else {
+									el.scrollTop = 500;
+								}
 							}, 50);
 						})
-						}
 					}else {
 						this.hasHistoryData = false;
 					}