1

keyBoard/Class/AiTalk/M/KBAIReplyModel.m

@@ -43,29 +43,35 @@
   }
   
   // Cell 布局：
-  // 左边距(68) + 头像(28) + 间距(8) + 内容区域 + 间距(8) + 点赞按钮(40) + 右边距(16)
+  // 左边距(68) + 头像(28) + 间距(8) + 内容区域 + 右边距(50)
-  // 内容区域宽度 = maxWidth - 68 - 28 - 8 - 8 - 40 - 16
+  // 内容区域宽度 = maxWidth - 68 - 28 - 8 - 50
-  CGFloat contentWidth = maxWidth - 68 - 28 - 8 - 8 - 40 - 16;
+  CGFloat contentWidth = maxWidth - 68 - 28 - 8 - 50;
   
-  // 构建富文本计算高度
+  // 用户名高度（可能包含 "回复 @xxx"）
-  NSMutableString *fullText = [NSMutableString stringWithString:self.userName];
+  NSMutableString *userNameText = [NSMutableString stringWithString:self.userName];
   if (self.replyToUserName.length > 0) {
-    [fullText appendFormat:@" 回复 @%@", self.replyToUserName];
+    [userNameText appendFormat:@" 回复 @%@", self.replyToUserName];
   }
-  [fullText appendFormat:@"：%@", self.content];
+  UIFont *userNameFont = [UIFont systemFontOfSize:13 weight:UIFontWeightMedium];
+  CGRect userNameRect = [userNameText boundingRectWithSize:CGSizeMake(contentWidth, CGFLOAT_MAX)
+                                                   options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
+                                                attributes:@{NSFontAttributeName: userNameFont}
+                                                   context:nil];
+  CGFloat userNameHeight = ceil(userNameRect.size.height);
   
+  // 内容高度
   UIFont *contentFont = [UIFont systemFontOfSize:14];
-  CGRect contentRect = [fullText boundingRectWithSize:CGSizeMake(contentWidth, CGFLOAT_MAX)
+  CGRect contentRect = [self.content boundingRectWithSize:CGSizeMake(contentWidth, CGFLOAT_MAX)
-                                              options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
+                                                  options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
-                                           attributes:@{NSFontAttributeName: contentFont}
+                                               attributes:@{NSFontAttributeName: contentFont}
-                                              context:nil];
+                                                  context:nil];
   CGFloat contentHeight = ceil(contentRect.size.height);
   
   // 时间高度（单行）
   CGFloat timeHeight = 14; // 11号字体
   
-  // 总高度 = 上边距(8) + 内容 + 间距(4) + 时间 + 下边距(8)
+  // 总高度 = 上边距(8) + 用户名 + 间距(4) + 内容 + 间距(6) + 时间 + 下边距(8)
-  CGFloat totalHeight = 8 + contentHeight + 4 + timeHeight + 8;
+  CGFloat totalHeight = 8 + userNameHeight + 4 + contentHeight + 6 + timeHeight + 8;
   
   // 最小高度（头像高度 + 上下边距）
   CGFloat minHeight = 8 + 28 + 8;

keyBoard/Class/AiTalk/V/KBAICommentHeaderView.h

@@ -20,6 +20,9 @@ NS_ASSUME_NONNULL_BEGIN
 /// 点赞按钮点击回调
 @property(nonatomic, copy, nullable) void (^onLikeAction)(void);
 
+/// 回复按钮点击回调
+@property(nonatomic, copy, nullable) void (^onReplyAction)(void);
+
 @end
 
 NS_ASSUME_NONNULL_END

keyBoard/Class/AiTalk/V/KBAICommentHeaderView.m

@@ -7,6 +7,7 @@
 
 #import "KBAICommentHeaderView.h"
 #import "KBAICommentModel.h"
+#import "KBTopImageButton.h"
 #import <Masonry/Masonry.h>
 #import <SDWebImage/SDWebImage.h>
 
@@ -14,9 +15,10 @@
 
 @property(nonatomic, strong) UIImageView *avatarImageView;
 @property(nonatomic, strong) UILabel *userNameLabel;
-@property(nonatomic, strong) UILabel *timeLabel;
 @property(nonatomic, strong) UILabel *contentLabel;
-@property(nonatomic, strong) UIButton *likeButton;
+@property(nonatomic, strong) UILabel *timeLabel;
+@property(nonatomic, strong) UIButton *replyButton;
+@property(nonatomic, strong) KBTopImageButton *likeButton;
 
 @end
 
@@ -37,8 +39,9 @@
 
   [self.contentView addSubview:self.avatarImageView];
   [self.contentView addSubview:self.userNameLabel];
-  [self.contentView addSubview:self.timeLabel];
   [self.contentView addSubview:self.contentLabel];
+  [self.contentView addSubview:self.timeLabel];
+  [self.contentView addSubview:self.replyButton];
   [self.contentView addSubview:self.likeButton];
 
   [self.avatarImageView mas_makeConstraints:^(MASConstraintMaker *make) {
@@ -53,24 +56,31 @@
     make.right.lessThanOrEqualTo(self.likeButton.mas_left).offset(-10);
   }];
 
+  
+
   [self.timeLabel mas_makeConstraints:^(MASConstraintMaker *make) {
     make.left.equalTo(self.userNameLabel);
-    make.top.equalTo(self.userNameLabel.mas_bottom).offset(2);
+    make.top.equalTo(self.contentLabel.mas_bottom).offset(8);
+    make.bottom.equalTo(self.contentView).offset(-12).priority(MASLayoutPriorityDefaultHigh);
   }];
 
-  [self.contentLabel mas_makeConstraints:^(MASConstraintMaker *make) {
+  [self.replyButton mas_makeConstraints:^(MASConstraintMaker *make) {
-    make.left.equalTo(self.userNameLabel);
+    make.left.equalTo(self.timeLabel.mas_right).offset(16);
-    make.top.equalTo(self.timeLabel.mas_bottom).offset(8);
+    make.centerY.equalTo(self.timeLabel);
-    make.right.equalTo(self.contentView).offset(-50);
-    make.bottom.equalTo(self.contentView).offset(-12).priority(MASLayoutPriorityDefaultHigh);
   }];
 
   [self.likeButton mas_makeConstraints:^(MASConstraintMaker *make) {
     make.right.equalTo(self.contentView).offset(-16);
     make.top.equalTo(self.contentView).offset(12);
-    make.width.mas_equalTo(50);
+    make.width.mas_equalTo(30);
     make.height.mas_equalTo(40);
   }];
+    
+    [self.contentLabel mas_makeConstraints:^(MASConstraintMaker *make) {
+      make.left.equalTo(self.userNameLabel);
+      make.top.equalTo(self.userNameLabel.mas_bottom).offset(6);
+      make.right.equalTo(self.likeButton.mas_left).offset(-5);
+    }];
 }
 
 #pragma mark - Configuration
@@ -80,19 +90,19 @@
       sd_setImageWithURL:[NSURL URLWithString:comment.avatarUrl]
         placeholderImage:[UIImage imageNamed:@"default_avatar"]];
   self.userNameLabel.text = comment.userName;
-  self.timeLabel.text = [comment formattedTime];
   self.contentLabel.text = comment.content;
+  self.timeLabel.text = [comment formattedTime];
 
   // 点赞按钮
   NSString *likeText =
       comment.likeCount > 0 ? [self formatLikeCount:comment.likeCount] : @"赞";
-  [self.likeButton setTitle:likeText forState:UIControlStateNormal];
+  self.likeButton.textLabel.text = likeText;
 
   UIImage *likeImage = comment.isLiked
                            ? [UIImage systemImageNamed:@"heart.fill"]
                            : [UIImage systemImageNamed:@"heart"];
-  [self.likeButton setImage:likeImage forState:UIControlStateNormal];
+  self.likeButton.iconView.image = likeImage;
-  self.likeButton.tintColor =
+  self.likeButton.iconView.tintColor =
       comment.isLiked ? [UIColor systemRedColor] : [UIColor grayColor];
 }
 
@@ -113,6 +123,12 @@
   }
 }
 
+- (void)replyButtonTapped {
+  if (self.onReplyAction) {
+    self.onReplyAction();
+  }
+}
+
 #pragma mark - Lazy Loading
 
 - (UIImageView *)avatarImageView {
@@ -129,22 +145,12 @@
 - (UILabel *)userNameLabel {
   if (!_userNameLabel) {
     _userNameLabel = [[UILabel alloc] init];
-    _userNameLabel.font = [UIFont systemFontOfSize:14
+    _userNameLabel.font = [UIFont systemFontOfSize:14 weight:UIFontWeightMedium];
-                                            weight:UIFontWeightMedium];
+    _userNameLabel.textColor = [UIColor secondaryLabelColor];
-    _userNameLabel.textColor = [UIColor labelColor];
   }
   return _userNameLabel;
 }
 
-- (UILabel *)timeLabel {
-  if (!_timeLabel) {
-    _timeLabel = [[UILabel alloc] init];
-    _timeLabel.font = [UIFont systemFontOfSize:12];
-    _timeLabel.textColor = [UIColor secondaryLabelColor];
-  }
-  return _timeLabel;
-}
-
 - (UILabel *)contentLabel {
   if (!_contentLabel) {
     _contentLabel = [[UILabel alloc] init];
@@ -155,19 +161,37 @@
   return _contentLabel;
 }
 
-- (UIButton *)likeButton {
+- (UILabel *)timeLabel {
-  if (!_likeButton) {
+  if (!_timeLabel) {
-    _likeButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    _timeLabel = [[UILabel alloc] init];
-    _likeButton.titleLabel.font = [UIFont systemFontOfSize:12];
+    _timeLabel.font = [UIFont systemFontOfSize:12];
-    [_likeButton setTitleColor:[UIColor grayColor]
+    _timeLabel.textColor = [UIColor secondaryLabelColor];
-                      forState:UIControlStateNormal];
+  }
-    [_likeButton setImage:[UIImage systemImageNamed:@"heart"]
+  return _timeLabel;
-                 forState:UIControlStateNormal];
+}
-    _likeButton.tintColor = [UIColor grayColor];
 
-    // 图片在上，文字在下的布局
+- (UIButton *)replyButton {
-    _likeButton.contentHorizontalAlignment =
+  if (!_replyButton) {
-        UIControlContentHorizontalAlignmentCenter;
+    _replyButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    _replyButton.titleLabel.font = [UIFont systemFontOfSize:12];
+    [_replyButton setTitle:@"回复" forState:UIControlStateNormal];
+    [_replyButton setTitleColor:[UIColor secondaryLabelColor] forState:UIControlStateNormal];
+    [_replyButton addTarget:self
+                     action:@selector(replyButtonTapped)
+           forControlEvents:UIControlEventTouchUpInside];
+  }
+  return _replyButton;
+}
+
+- (KBTopImageButton *)likeButton {
+  if (!_likeButton) {
+    _likeButton = [[KBTopImageButton alloc] init];
+    _likeButton.iconSize = CGSizeMake(20, 20);
+    _likeButton.spacing = 2;
+    _likeButton.iconView.image = [UIImage systemImageNamed:@"heart"];
+    _likeButton.iconView.tintColor = [UIColor grayColor];
+    _likeButton.textLabel.font = [UIFont systemFontOfSize:11];
+    _likeButton.textLabel.textColor = [UIColor grayColor];
     [_likeButton addTarget:self
                     action:@selector(likeButtonTapped)
           forControlEvents:UIControlEventTouchUpInside];

keyBoard/Class/AiTalk/V/KBAICommentView.m

@@ -35,6 +35,11 @@ static NSString *const kCommentFooterIdentifier = @"CommentFooter";
 /// 输入框底部约束
 @property(nonatomic, strong) MASConstraint *inputBottomConstraint;
 
+/// 当前回复的目标（一级评论）
+@property(nonatomic, weak) KBAICommentModel *replyToComment;
+/// 当前回复的目标（二级评论）
+@property(nonatomic, weak) KBAIReplyModel *replyToReply;
+
 @end
 
 @implementation KBAICommentView
@@ -245,6 +250,10 @@ static NSString *const kCommentFooterIdentifier = @"CommentFooter";
     [weakSelf.tableView reloadRowsAtIndexPaths:@[ indexPath ]
                               withRowAnimation:UITableViewRowAnimationNone];
   };
+  
+  cell.onReplyAction = ^{
+    [weakSelf setReplyToComment:comment reply:reply];
+  };
 
   return cell;
 }
@@ -267,6 +276,10 @@ static NSString *const kCommentFooterIdentifier = @"CommentFooter";
     [weakSelf.tableView reloadSections:[NSIndexSet indexSetWithIndex:section]
                       withRowAnimation:UITableViewRowAnimationNone];
   };
+  
+  header.onReplyAction = ^{
+    [weakSelf setReplyToComment:comment reply:nil];
+  };
 
   return header;
 }
@@ -481,12 +494,55 @@ static NSInteger const kRepliesLoadCount = 5;
   return _inputView;
 }
 
+#pragma mark - Reply
+
+- (void)setReplyToComment:(KBAICommentModel *)comment reply:(KBAIReplyModel *)reply {
+  self.replyToComment = comment;
+  self.replyToReply = reply;
+  
+  if (reply) {
+    // 回复二级评论
+    self.inputView.placeholder = [NSString stringWithFormat:@"回复 @%@", reply.userName];
+  } else if (comment) {
+    // 回复一级评论
+    self.inputView.placeholder = [NSString stringWithFormat:@"回复 @%@", comment.userName];
+  } else {
+    // 普通评论
+    self.inputView.placeholder = @"说点什么...";
+  }
+}
+
+- (void)clearReplyTarget {
+  self.replyToComment = nil;
+  self.replyToReply = nil;
+  self.inputView.placeholder = @"说点什么...";
+}
+
 #pragma mark - Send Comment
 
 - (void)sendCommentWithText:(NSString *)text {
   if (text.length == 0) return;
   
-  // 创建新评论
+  CGFloat tableWidth = self.tableView.bounds.size.width;
+  if (tableWidth <= 0) {
+    tableWidth = [UIScreen mainScreen].bounds.size.width;
+  }
+  
+  if (self.replyToComment) {
+    // 回复评论（添加二级评论）
+    [self sendReplyWithText:text tableWidth:tableWidth];
+  } else {
+    // 发送一级评论
+    [self sendNewCommentWithText:text tableWidth:tableWidth];
+  }
+  
+  // 清空输入框和回复目标
+  [self.inputView clearText];
+  [self clearReplyTarget];
+}
+
+- (void)sendNewCommentWithText:(NSString *)text tableWidth:(CGFloat)tableWidth {
+  // 创建新一级评论
   KBAICommentModel *newComment = [[KBAICommentModel alloc] init];
   newComment.commentId = [NSUUID UUID].UUIDString;
   newComment.userId = @"current_user";
@@ -499,10 +555,6 @@ static NSInteger const kRepliesLoadCount = 5;
   newComment.replies = @[];
   
   // 计算高度缓存
-  CGFloat tableWidth = self.tableView.bounds.size.width;
-  if (tableWidth <= 0) {
-    tableWidth = [UIScreen mainScreen].bounds.size.width;
-  }
   newComment.cachedHeaderHeight = [newComment calculateHeaderHeightWithMaxWidth:tableWidth];
   
   // 插入到数组第一个
@@ -516,9 +568,69 @@ static NSInteger const kRepliesLoadCount = 5;
   
   // 滚动到顶部
   [self.tableView setContentOffset:CGPointZero animated:YES];
+}
+
+- (void)sendReplyWithText:(NSString *)text tableWidth:(CGFloat)tableWidth {
+  KBAICommentModel *comment = self.replyToComment;
+  if (!comment) return;
   
-  // 清空输入框
+  // 创建新二级评论
-  [self.inputView clearText];
+  KBAIReplyModel *newReply = [[KBAIReplyModel alloc] init];
+  newReply.replyId = [NSUUID UUID].UUIDString;
+  newReply.userId = @"current_user";
+  newReply.userName = @"我";
+  newReply.avatarUrl = @"";
+  newReply.content = text;
+  newReply.likeCount = 0;
+  newReply.isLiked = NO;
+  newReply.createTime = [[NSDate date] timeIntervalSince1970];
+  
+  // 如果是回复二级评论，设置被回复用户
+  if (self.replyToReply) {
+    newReply.replyToUserName = self.replyToReply.userName;
+  }
+  
+  // 计算高度缓存
+  newReply.cachedCellHeight = [newReply calculateCellHeightWithMaxWidth:tableWidth];
+  
+  // 添加到 replies 数组
+  NSMutableArray *newReplies = [NSMutableArray arrayWithArray:comment.replies];
+  [newReplies addObject:newReply];
+  comment.replies = newReplies;
+  comment.totalReplyCount = newReplies.count;
+  
+  // 找到该评论的 section
+  NSInteger section = [self.comments indexOfObject:comment];
+  if (section == NSNotFound) return;
+  
+  // 如果已展开，添加到 displayedReplies 并插入行
+  if (comment.isRepliesExpanded) {
+    NSInteger newRowIndex = comment.displayedReplies.count;
+    [comment.displayedReplies addObject:newReply];
+    
+    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:newRowIndex inSection:section];
+    [self.tableView insertRowsAtIndexPaths:@[indexPath]
+                          withRowAnimation:UITableViewRowAnimationAutomatic];
+    
+    // 刷新 Footer
+    KBAICommentFooterView *footerView =
+        (KBAICommentFooterView *)[self.tableView footerViewForSection:section];
+    if (footerView) {
+      [footerView configureWithComment:comment];
+    }
+    
+    // 滚动到新回复
+    [self.tableView scrollToRowAtIndexPath:indexPath
+                          atScrollPosition:UITableViewScrollPositionBottom
+                                  animated:YES];
+  } else {
+    // 未展开，刷新 Footer 显示新的回复数
+    KBAICommentFooterView *footerView =
+        (KBAICommentFooterView *)[self.tableView footerViewForSection:section];
+    if (footerView) {
+      [footerView configureWithComment:comment];
+    }
+  }
 }
 
 @end

keyBoard/Class/AiTalk/V/KBAIReplyCell.h

@@ -20,6 +20,9 @@ NS_ASSUME_NONNULL_BEGIN
 /// 点赞按钮点击回调
 @property(nonatomic, copy, nullable) void (^onLikeAction)(void);
 
+/// 回复按钮点击回调
+@property(nonatomic, copy, nullable) void (^onReplyAction)(void);
+
 @end
 
 NS_ASSUME_NONNULL_END

keyBoard/Class/AiTalk/V/KBAIReplyCell.m

@@ -7,15 +7,18 @@
 
 #import "KBAIReplyCell.h"
 #import "KBAIReplyModel.h"
+#import "KBTopImageButton.h"
 #import <Masonry/Masonry.h>
 #import <SDWebImage/SDWebImage.h>
 
 @interface KBAIReplyCell ()
 
 @property(nonatomic, strong) UIImageView *avatarImageView;
+@property(nonatomic, strong) UILabel *userNameLabel;
 @property(nonatomic, strong) UILabel *contentLabel;
 @property(nonatomic, strong) UILabel *timeLabel;
-@property(nonatomic, strong) UIButton *likeButton;
+@property(nonatomic, strong) UIButton *replyButton;
+@property(nonatomic, strong) KBTopImageButton *likeButton;
 
 @end
 
@@ -36,36 +39,48 @@
 
 - (void)setupUI {
   [self.contentView addSubview:self.avatarImageView];
+  [self.contentView addSubview:self.userNameLabel];
   [self.contentView addSubview:self.contentLabel];
   [self.contentView addSubview:self.timeLabel];
+  [self.contentView addSubview:self.replyButton];
   [self.contentView addSubview:self.likeButton];
 
-  // 左侧缩进 48pt（对齐一级评论内容）
+  // 左侧缩进（对齐一级评论内容）
   [self.avatarImageView mas_makeConstraints:^(MASConstraintMaker *make) {
     make.left.equalTo(self.contentView).offset(68); // 16 + 40 + 12 = 68
     make.top.equalTo(self.contentView).offset(8);
     make.width.height.mas_equalTo(28);
   }];
 
-  [self.contentLabel mas_makeConstraints:^(MASConstraintMaker *make) {
+  [self.userNameLabel mas_makeConstraints:^(MASConstraintMaker *make) {
     make.left.equalTo(self.avatarImageView.mas_right).offset(8);
     make.top.equalTo(self.avatarImageView);
-    make.right.equalTo(self.likeButton.mas_left).offset(-8);
+    make.right.equalTo(self.contentView).offset(-50);
   }];
 
   [self.timeLabel mas_makeConstraints:^(MASConstraintMaker *make) {
-    make.left.equalTo(self.contentLabel);
+    make.left.equalTo(self.userNameLabel);
-    make.top.equalTo(self.contentLabel.mas_bottom).offset(4);
+    make.top.equalTo(self.contentLabel.mas_bottom).offset(6);
-    // 降低优先级，避免与 TableView 设置的固定高度约束冲突
     make.bottom.equalTo(self.contentView).offset(-8).priority(MASLayoutPriorityDefaultHigh);
   }];
 
+  [self.replyButton mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.left.equalTo(self.timeLabel.mas_right).offset(16);
+    make.centerY.equalTo(self.timeLabel);
+  }];
+
   [self.likeButton mas_makeConstraints:^(MASConstraintMaker *make) {
     make.right.equalTo(self.contentView).offset(-16);
     make.top.equalTo(self.contentView).offset(8);
-    make.width.mas_equalTo(40);
+    make.width.mas_equalTo(30);
     make.height.mas_equalTo(30);
   }];
+    
+    [self.contentLabel mas_makeConstraints:^(MASConstraintMaker *make) {
+      make.left.equalTo(self.userNameLabel);
+      make.top.equalTo(self.userNameLabel.mas_bottom).offset(4);
+      make.right.equalTo(self.likeButton.mas_left).offset(-5);
+    }];
 }
 
 #pragma mark - Configuration
@@ -75,58 +90,54 @@
       sd_setImageWithURL:[NSURL URLWithString:reply.avatarUrl]
         placeholderImage:[UIImage imageNamed:@"default_avatar"]];
 
-  // 构建富文本：用户名（蓝色）+ @回复用户（蓝色）+ 内容
+  // 用户名（如果有回复对象，显示 "用户名 回复 @被回复用户"）
-  NSMutableAttributedString *attrText =
-      [[NSMutableAttributedString alloc] init];
-
-  // 用户名
-  NSDictionary *nameAttrs = @{
-    NSFontAttributeName : [UIFont systemFontOfSize:14
-                                            weight:UIFontWeightMedium],
-    NSForegroundColorAttributeName : [UIColor labelColor]
-  };
-  [attrText appendAttributedString:[[NSAttributedString alloc]
-                                       initWithString:reply.userName
-                                           attributes:nameAttrs]];
-
-  // @回复用户
   if (reply.replyToUserName.length > 0) {
+    NSMutableAttributedString *attrName = [[NSMutableAttributedString alloc] init];
+    
+    NSDictionary *nameAttrs = @{
+      NSFontAttributeName : [UIFont systemFontOfSize:13 weight:UIFontWeightMedium],
+      NSForegroundColorAttributeName : [UIColor secondaryLabelColor]
+    };
+    [attrName appendAttributedString:[[NSAttributedString alloc]
+                                         initWithString:reply.userName
+                                             attributes:nameAttrs]];
+    
     NSDictionary *replyAttrs = @{
-      NSFontAttributeName : [UIFont systemFontOfSize:14],
+      NSFontAttributeName : [UIFont systemFontOfSize:13],
+      NSForegroundColorAttributeName : [UIColor secondaryLabelColor]
+    };
+    [attrName appendAttributedString:[[NSAttributedString alloc]
+                                         initWithString:@" 回复 "
+                                             attributes:replyAttrs]];
+    
+    NSDictionary *toUserAttrs = @{
+      NSFontAttributeName : [UIFont systemFontOfSize:13],
       NSForegroundColorAttributeName : [UIColor systemBlueColor]
     };
-    NSString *replyTo =
+    [attrName appendAttributedString:[[NSAttributedString alloc]
-        [NSString stringWithFormat:@" 回复 @%@", reply.replyToUserName];
+                                         initWithString:[NSString stringWithFormat:@"@%@", reply.replyToUserName]
-    [attrText appendAttributedString:[[NSAttributedString alloc]
+                                             attributes:toUserAttrs]];
-                                         initWithString:replyTo
+    
-                                             attributes:replyAttrs]];
+    self.userNameLabel.attributedText = attrName;
+  } else {
+    self.userNameLabel.attributedText = nil;
+    self.userNameLabel.text = reply.userName;
   }
 
-  // 内容
+  // 评论内容
-  NSDictionary *contentAttrs = @{
+  self.contentLabel.text = reply.content;
-    NSFontAttributeName : [UIFont systemFontOfSize:14],
-    NSForegroundColorAttributeName : [UIColor labelColor]
-  };
-  NSString *content = [NSString stringWithFormat:@"：%@", reply.content];
-  [attrText appendAttributedString:[[NSAttributedString alloc]
-                                       initWithString:content
-                                           attributes:contentAttrs]];
-
-  self.contentLabel.attributedText = attrText;
 
   // 时间
   self.timeLabel.text = [reply formattedTime];
 
   // 点赞
-  NSString *likeText =
+  NSString *likeText = reply.likeCount > 0 ? [self formatLikeCount:reply.likeCount] : @"";
-      reply.likeCount > 0 ? [self formatLikeCount:reply.likeCount] : @"";
+  self.likeButton.textLabel.text = likeText;
-  [self.likeButton setTitle:likeText forState:UIControlStateNormal];
 
   UIImage *likeImage = reply.isLiked ? [UIImage systemImageNamed:@"heart.fill"]
                                      : [UIImage systemImageNamed:@"heart"];
-  [self.likeButton setImage:likeImage forState:UIControlStateNormal];
+  self.likeButton.iconView.image = likeImage;
-  self.likeButton.tintColor =
+  self.likeButton.iconView.tintColor = reply.isLiked ? [UIColor systemRedColor] : [UIColor grayColor];
-      reply.isLiked ? [UIColor systemRedColor] : [UIColor grayColor];
 }
 
 - (NSString *)formatLikeCount:(NSInteger)count {
@@ -146,6 +157,12 @@
   }
 }
 
+- (void)replyButtonTapped {
+  if (self.onReplyAction) {
+    self.onReplyAction();
+  }
+}
+
 #pragma mark - Lazy Loading
 
 - (UIImageView *)avatarImageView {
@@ -159,9 +176,21 @@
   return _avatarImageView;
 }
 
+- (UILabel *)userNameLabel {
+  if (!_userNameLabel) {
+    _userNameLabel = [[UILabel alloc] init];
+    _userNameLabel.font = [UIFont systemFontOfSize:13 weight:UIFontWeightMedium];
+    _userNameLabel.textColor = [UIColor secondaryLabelColor];
+    _userNameLabel.numberOfLines = 0;
+  }
+  return _userNameLabel;
+}
+
 - (UILabel *)contentLabel {
   if (!_contentLabel) {
     _contentLabel = [[UILabel alloc] init];
+    _contentLabel.font = [UIFont systemFontOfSize:14];
+    _contentLabel.textColor = [UIColor labelColor];
     _contentLabel.numberOfLines = 0;
   }
   return _contentLabel;
@@ -176,22 +205,31 @@
   return _timeLabel;
 }
 
-- (UIButton *)likeButton {
+- (UIButton *)replyButton {
+  if (!_replyButton) {
+    _replyButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    _replyButton.titleLabel.font = [UIFont systemFontOfSize:11];
+    [_replyButton setTitle:@"回复" forState:UIControlStateNormal];
+    [_replyButton setTitleColor:[UIColor secondaryLabelColor] forState:UIControlStateNormal];
+    [_replyButton addTarget:self
+                     action:@selector(replyButtonTapped)
+           forControlEvents:UIControlEventTouchUpInside];
+  }
+  return _replyButton;
+}
+
+- (KBTopImageButton *)likeButton {
   if (!_likeButton) {
-    _likeButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    _likeButton = [[KBTopImageButton alloc] init];
-    _likeButton.titleLabel.font = [UIFont systemFontOfSize:11];
+    _likeButton.iconSize = CGSizeMake(16, 16);
-    [_likeButton setTitleColor:[UIColor grayColor]
+    _likeButton.spacing = 2;
-                      forState:UIControlStateNormal];
+    _likeButton.iconView.image = [UIImage systemImageNamed:@"heart"];
-    [_likeButton setImage:[UIImage systemImageNamed:@"heart"]
+    _likeButton.iconView.tintColor = [UIColor grayColor];
-                 forState:UIControlStateNormal];
+    _likeButton.textLabel.font = [UIFont systemFontOfSize:10];
-    _likeButton.tintColor = [UIColor grayColor];
+    _likeButton.textLabel.textColor = [UIColor grayColor];
     [_likeButton addTarget:self
                     action:@selector(likeButtonTapped)
           forControlEvents:UIControlEventTouchUpInside];
-
-    // 设置图片和文字间距
-    _likeButton.imageEdgeInsets = UIEdgeInsetsMake(0, -2, 0, 2);
-    _likeButton.titleEdgeInsets = UIEdgeInsetsMake(0, 2, 0, -2);
   }
   return _likeButton;
 }