添加二级评论多个的时候的逻辑，默认每次点击出现5条

keyBoard/Class/AiTalk/M/KBAICommentModel.m

@@ -64,19 +64,29 @@
     return KBAIReplyFooterStateHidden;
   }
 
-  // 已展开
-  if (self.isRepliesExpanded) {
-    return KBAIReplyFooterStateCollapse;
+  // 未展开（初始状态）
+  if (!self.isRepliesExpanded) {
+    return KBAIReplyFooterStateExpand;
   }
 
-  // 未展开
-  return KBAIReplyFooterStateExpand;
+  // 已展开但还有更多
+  if (self.displayedReplies.count < self.totalReplyCount) {
+    return KBAIReplyFooterStateLoadMore;
+  }
+
+  // 全部展开
+  return KBAIReplyFooterStateCollapse;
 }
 
-- (void)expandAllReplies {
+- (void)loadMoreReplies:(NSInteger)count {
   self.isRepliesExpanded = YES;
-  [self.displayedReplies removeAllObjects];
-  [self.displayedReplies addObjectsFromArray:self.replies];
+  
+  NSInteger currentCount = self.displayedReplies.count;
+  NSInteger endIndex = MIN(currentCount + count, self.replies.count);
+  
+  for (NSInteger i = currentCount; i < endIndex; i++) {
+    [self.displayedReplies addObject:self.replies[i]];
+  }
 }
 
 - (void)collapseReplies {