信息流分页加载，重复数据问题处理

@@ -26,7 +26,7 @@ export function touchUpLoadMore(model: PageModel) {
   }, () => {
   }, () => {
     self.offsetY = 0;
     self.offsetY = 0;
   })
   })
-  if ((self.isCanLoadMore === true) && (self.hasMore === true)) {
+  if ((self.isCanLoadMore === true) && (self.hasMore === true) && (self.isLoading === false)) {
     self.isLoading = true;
     self.isLoading = true;
     setTimeout(() => {
     setTimeout(() => {
       closeLoadMore(model);
       closeLoadMore(model);