处理tabbar

keyBoard.xcodeproj/project.pbxproj

@@ -194,6 +194,7 @@
 		04C6EADD2EAF8CEB0089C901 /* KBToolBar.m in Sources */ = {isa = PBXBuildFile; fileRef = 04C6EADC2EAF8CEB0089C901 /* KBToolBar.m */; };
 		04D1F6B22EDFF10A00B12345 /* KBSkinInstallBridge.m in Sources */ = {isa = PBXBuildFile; fileRef = 04D1F6B12EDFF10A00B12345 /* KBSkinInstallBridge.m */; };
 		04D1F6B32EDFF10A00B12345 /* KBSkinInstallBridge.m in Sources */ = {isa = PBXBuildFile; fileRef = 04D1F6B12EDFF10A00B12345 /* KBSkinInstallBridge.m */; };
+		04E0383E2F1A7C30002CA5A0 /* KBCustomTabBar.m in Sources */ = {isa = PBXBuildFile; fileRef = 04E0383D2F1A7C30002CA5A0 /* KBCustomTabBar.m */; };
 		04E161832F10E6470022C23B /* normal_hei_them.zip in Resources */ = {isa = PBXBuildFile; fileRef = 04E161812F10E6470022C23B /* normal_hei_them.zip */; };
 		04E161842F10E6470022C23B /* normal_them.zip in Resources */ = {isa = PBXBuildFile; fileRef = 04E161822F10E6470022C23B /* normal_them.zip */; };
 		04FC95672EB0546C007BD342 /* KBKey.m in Sources */ = {isa = PBXBuildFile; fileRef = 04FC95652EB0546C007BD342 /* KBKey.m */; };
@@ -605,6 +606,8 @@
 		04C6EAE12EAF940F0089C901 /* KBPermissionViewController.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = KBPermissionViewController.m; sourceTree = "<group>"; };
 		04D1F6B02EDFF10A00B12345 /* KBSkinInstallBridge.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = KBSkinInstallBridge.h; sourceTree = "<group>"; };
 		04D1F6B12EDFF10A00B12345 /* KBSkinInstallBridge.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = KBSkinInstallBridge.m; sourceTree = "<group>"; };
+		04E0383C2F1A7C30002CA5A0 /* KBCustomTabBar.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = KBCustomTabBar.h; sourceTree = "<group>"; };
+		04E0383D2F1A7C30002CA5A0 /* KBCustomTabBar.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = KBCustomTabBar.m; sourceTree = "<group>"; };
 		04E161812F10E6470022C23B /* normal_hei_them.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = normal_hei_them.zip; sourceTree = "<group>"; };
 		04E161822F10E6470022C23B /* normal_them.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = normal_them.zip; sourceTree = "<group>"; };
 		04FC953A2EAFAE56007BD342 /* KeyBoardPrefixHeader.pch */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = KeyBoardPrefixHeader.pch; sourceTree = "<group>"; };
@@ -1637,6 +1640,8 @@
 				04FC95D62EB1EA16007BD342 /* BaseTableView.m */,
 				048908FC2EC0CC2400FABA60 /* UIScrollView+KBEmptyView.h */,
 				048908FD2EC0CC2400FABA60 /* UIScrollView+KBEmptyView.m */,
+				04E0383C2F1A7C30002CA5A0 /* KBCustomTabBar.h */,
+				04E0383D2F1A7C30002CA5A0 /* KBCustomTabBar.m */,
 			);
 			path = V;
 			sourceTree = "<group>";
@@ -2312,6 +2317,7 @@
 				048908F52EC0496400FABA60 /* KBShopItemVC.m in Sources */,
 				04FC95F42EB339C1007BD342 /* AppleSignInManager.m in Sources */,
 				04C6EAC12EAF86530089C901 /* ViewController.m in Sources */,
+				04E0383E2F1A7C30002CA5A0 /* KBCustomTabBar.m in Sources */,
 				A1B2C4002EB4A0A100000004 /* KBAuthManager.m in Sources */,
 				A1B2C4212EB4B7A100000001 /* KBKeyboardPermissionManager.m in Sources */,
 				0498BD682EE01180006CC1D5 /* KBEmailRegistVC.m in Sources */,

keyBoard/Class/AiTalk/VC/KBAiMainVC.h

@@ -10,7 +10,7 @@
 NS_ASSUME_NONNULL_BEGIN
 
 /// AI 语音陪伴聊天主界面
-@interface KBAiMainVC : UIViewController
+@interface KBAiMainVC : BaseViewController
 
 @end
 

keyBoard/Class/AiTalk/VC/KBAiMainVC.m

@@ -46,6 +46,11 @@
   [self setupOrchestrator];
 }
 
+- (void)viewWillAppear:(BOOL)animated {
+  [super viewWillAppear:animated];
+  // TabBar 背景色由 BaseTabBarController 统一管理，这里不需要设置
+}
+
 - (void)viewWillDisappear:(BOOL)animated {
   [super viewWillDisappear:animated];
 
@@ -56,55 +61,16 @@
 - (void)viewDidLayoutSubviews {
   [super viewDidLayoutSubviews];
 
-  // 设置黑色渐变层（从底部到顶部，黑色到透明）
+  // 只更新 mask 的 frame（mask 已在 setupUI 中创建）
-  if (!self.gradientLayer) {
+  if (self.blurEffectView.layer.mask) {
-    self.gradientLayer = [CAGradientLayer layer];
-    self.gradientLayer.startPoint = CGPointMake(0.53, 1); // 底部
-    self.gradientLayer.endPoint = CGPointMake(0.54, 0);   // 顶部
-    // 渐变颜色：从黑色 24% 不透明度到透明
-    self.gradientLayer.colors = @[
-      (__bridge id)[UIColor colorWithRed:0 / 255.0
-                                   green:0 / 255.0
-                                    blue:0 / 255.0
-                                   alpha:0.24]
-          .CGColor,
-      (__bridge id)[UIColor colorWithRed:3 / 255.0
-                                   green:3 / 255.0
-                                    blue:3 / 255.0
-                                   alpha:0]
-          .CGColor
-    ];
-    self.gradientLayer.locations = @[ @(0.7), @(1.0) ];
-    [self.tabbarBackgroundView.layer addSublayer:self.gradientLayer];
-  }
-
-  // 更新黑色渐变层的 frame
-  self.gradientLayer.frame = self.tabbarBackgroundView.bounds;
-
-  // 为 blurEffectView 添加透明度渐变
-  // mask（从底部到中间不透明，从中间到顶部透明）
-  if (!self.blurEffectView.layer.mask) {
-    CAGradientLayer *maskLayer = [CAGradientLayer layer];
-    maskLayer.startPoint = CGPointMake(0.5, 1); // 底部
-    maskLayer.endPoint = CGPointMake(0.5, 0);   // 顶部
-    // 底部到中间保持不透明，从中间到顶部过渡透明
-    maskLayer.colors = @[
-      (__bridge id)[UIColor whiteColor].CGColor, // 底部：完全不透明
-      (__bridge id)[UIColor whiteColor].CGColor, // 中间：完全不透明
-      (__bridge id)[UIColor clearColor].CGColor  // 顶部：完全透明
-    ];
-    maskLayer.locations = @[ @(0.0), @(0.5), @(1.0) ];
-    self.blurEffectView.layer.mask = maskLayer;
-  }
-
-  // 更新 mask 的 frame
     self.blurEffectView.layer.mask.frame = self.blurEffectView.bounds;
   }
+}
 
 #pragma mark - UI Setup
 
 - (void)setupUI {
-  self.view.backgroundColor = [UIColor systemBackgroundColor];
+  self.view.backgroundColor = [UIColor whiteColor];
   self.title = @"AI 助手";
 
   // 安全区域
@@ -131,7 +97,19 @@
   self.blurEffectView.translatesAutoresizingMaskIntoConstraints = NO;
   [self.tabbarBackgroundView addSubview:self.blurEffectView];
 
-  // 渐变层将在 viewDidLayoutSubviews 中设置
+  // 为 blurEffectView 创建透明度渐变
+  // mask（从底部到中间不透明，从中间到顶部透明）
+  CAGradientLayer *maskLayer = [CAGradientLayer layer];
+  maskLayer.startPoint = CGPointMake(0.5, 1); // 底部
+  maskLayer.endPoint = CGPointMake(0.5, 0);   // 顶部
+  // 底部到中间保持不透明，从中间到顶部过渡透明
+  maskLayer.colors = @[
+    (__bridge id)[UIColor whiteColor].CGColor, // 底部：完全不透明
+    (__bridge id)[UIColor whiteColor].CGColor, // 中间：完全不透明
+    (__bridge id)[UIColor clearColor].CGColor  // 顶部：完全透明
+  ];
+  maskLayer.locations = @[ @(0.0), @(0.5), @(1.0) ];
+  self.blurEffectView.layer.mask = maskLayer;
 
   // 状态标签
   self.statusLabel = [[UILabel alloc] init];

keyBoard/Class/Base/V/KBCustomTabBar.h

@@ -0,0 +1,32 @@
+//
+//  KBCustomTabBar.h
+//  keyBoard
+//
+//  Created by Assistant on 2026/01/16.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class KBCustomTabBar;
+
+@protocol KBCustomTabBarDelegate <NSObject>
+
+- (void)customTabBar:(KBCustomTabBar *)tabBar
+    didSelectItemAtIndex:(NSInteger)index;
+
+@end
+
+@interface KBCustomTabBar : UIView
+
+@property(nonatomic, weak) id<KBCustomTabBarDelegate> delegate;
+@property(nonatomic, assign) NSInteger selectedIndex;
+
+- (instancetype)initWithItems:(NSArray<UITabBarItem *> *)items;
+- (void)setSelectedIndex:(NSInteger)selectedIndex animated:(BOOL)animated;
+- (void)setTransparentBackground:(BOOL)transparent;
+
+@end
+
+NS_ASSUME_NONNULL_END

keyBoard/Class/Base/V/KBCustomTabBar.m

@@ -0,0 +1,159 @@
+//
+//  KBCustomTabBar.m
+//  keyBoard
+//
+//  Created by Assistant on 2026/01/16.
+//
+
+#import "KBCustomTabBar.h"
+#import "Masonry.h"
+
+@interface KBCustomTabBar ()
+
+@property(nonatomic, strong) NSArray<UITabBarItem *> *items;
+@property(nonatomic, strong) NSMutableArray<UIButton *> *buttons;
+@property(nonatomic, strong) UIView *backgroundView;
+
+@end
+
+@implementation KBCustomTabBar
+
+- (instancetype)initWithItems:(NSArray<UITabBarItem *> *)items {
+  self = [super initWithFrame:CGRectZero];
+  if (self) {
+    _items = items;
+    _selectedIndex = 0;
+    _buttons = [NSMutableArray array];
+    [self setupUI];
+  }
+  return self;
+}
+
+- (void)setupUI {
+  // 背景视图
+  self.backgroundView = [[UIView alloc] init];
+  self.backgroundView.backgroundColor = [UIColor whiteColor];
+  [self addSubview:self.backgroundView];
+  [self.backgroundView mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.edges.equalTo(self);
+  }];
+
+  // 创建按钮
+  UIStackView *stackView = [[UIStackView alloc] init];
+  stackView.axis = UILayoutConstraintAxisHorizontal;
+  stackView.distribution = UIStackViewDistributionFillEqually;
+  stackView.alignment = UIStackViewAlignmentFill;
+  [self addSubview:stackView];
+  [stackView mas_makeConstraints:^(MASConstraintMaker *make) {
+    make.edges.equalTo(self);
+  }];
+
+  for (NSInteger i = 0; i < self.items.count; i++) {
+    UITabBarItem *item = self.items[i];
+    UIButton *button = [self createButtonWithItem:item index:i];
+    [stackView addArrangedSubview:button];
+    [self.buttons addObject:button];
+  }
+
+  // 设置初始选中状态
+  [self updateButtonStates];
+}
+
+- (UIButton *)createButtonWithItem:(UITabBarItem *)item index:(NSInteger)index {
+  UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
+  button.tag = index;
+
+  // 设置图片
+  [button setImage:item.image forState:UIControlStateNormal];
+  [button setImage:item.selectedImage forState:UIControlStateSelected];
+
+  // 设置标题
+  [button setTitle:item.title forState:UIControlStateNormal];
+  [button setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
+  [button setTitleColor:[UIColor blackColor] forState:UIControlStateSelected];
+  button.titleLabel.font = [UIFont systemFontOfSize:10];
+
+  // 布局：图片在上，文字在下
+  button.imageView.contentMode = UIViewContentModeScaleAspectFit;
+  button.titleLabel.textAlignment = NSTextAlignmentCenter;
+
+  // 调整图片和文字位置
+  CGFloat spacing = 4.0;
+  button.imageEdgeInsets = UIEdgeInsetsMake(-spacing, 0, spacing, 0);
+  button.titleEdgeInsets = UIEdgeInsetsMake(
+      spacing, -button.imageView.frame.size.width, -spacing, 0);
+  button.contentEdgeInsets = UIEdgeInsetsMake(spacing, 0, spacing, 0);
+
+  // 垂直排列
+  [button setContentVerticalAlignment:UIControlContentVerticalAlignmentCenter];
+  [button
+      setContentHorizontalAlignment:UIControlContentHorizontalAlignmentCenter];
+
+  [button addTarget:self
+                action:@selector(buttonTapped:)
+      forControlEvents:UIControlEventTouchUpInside];
+
+  return button;
+}
+
+- (void)buttonTapped:(UIButton *)button {
+  NSInteger index = button.tag;
+  if (index != self.selectedIndex) {
+    self.selectedIndex = index;
+    [self updateButtonStates];
+
+    if ([self.delegate respondsToSelector:@selector(customTabBar:
+                                              didSelectItemAtIndex:)]) {
+      [self.delegate customTabBar:self didSelectItemAtIndex:index];
+    }
+  }
+}
+
+- (void)setSelectedIndex:(NSInteger)selectedIndex animated:(BOOL)animated {
+  if (_selectedIndex != selectedIndex) {
+    _selectedIndex = selectedIndex;
+    [self updateButtonStates];
+  }
+}
+
+- (void)setSelectedIndex:(NSInteger)selectedIndex {
+  [self setSelectedIndex:selectedIndex animated:NO];
+}
+
+- (void)updateButtonStates {
+  for (NSInteger i = 0; i < self.buttons.count; i++) {
+    UIButton *button = self.buttons[i];
+    button.selected = (i == self.selectedIndex);
+  }
+}
+
+- (void)setTransparentBackground:(BOOL)transparent {
+  if (transparent) {
+    self.backgroundView.backgroundColor = [UIColor clearColor];
+  } else {
+    self.backgroundView.backgroundColor = [UIColor whiteColor];
+  }
+}
+
+- (void)layoutSubviews {
+  [super layoutSubviews];
+
+  // 调整按钮的图片和文字布局
+  for (UIButton *button in self.buttons) {
+    CGFloat imageWidth = button.imageView.frame.size.width;
+    CGFloat imageHeight = button.imageView.frame.size.height;
+    CGFloat titleWidth = button.titleLabel.frame.size.width;
+    CGFloat titleHeight = button.titleLabel.frame.size.height;
+
+    CGFloat spacing = 4.0;
+
+    // 图片在上
+    button.imageEdgeInsets =
+        UIEdgeInsetsMake(-(titleHeight + spacing), 0, 0, -titleWidth);
+    // 文字在下
+    button.titleEdgeInsets =
+        UIEdgeInsetsMake(0, -imageWidth, -(imageHeight + spacing), 0);
+  }
+}
+
+@end

keyBoard/Class/Base/VC/BaseNavigationController.m

@@ -24,24 +24,32 @@
   self.navigationBar.tintColor = [UIColor blackColor]; // 箭头/按钮的着色
 
   if (@available(iOS 14.0, *)) {
-        self.navigationBar.topItem.backButtonDisplayMode = UINavigationItemBackButtonDisplayModeMinimal;
+    self.navigationBar.topItem.backButtonDisplayMode =
+        UINavigationItemBackButtonDisplayModeMinimal;
   }
 
-    // 统一开启“边缘右滑返回”（interactivePopGestureRecognizer 在自定义导航栏/隐藏系统导航栏场景下可能失效）
+  // 统一开启“边缘右滑返回”（interactivePopGestureRecognizer
+  // 在自定义导航栏/隐藏系统导航栏场景下可能失效）
   if (self.interactivePopGestureRecognizer) {
     self.interactivePopGestureRecognizer.delegate = self;
     self.interactivePopGestureRecognizer.enabled = YES;
   }
 }
 
-- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
+- (void)pushViewController:(UIViewController *)viewController
+                  animated:(BOOL)animated {
   if (self.viewControllers.count > 0) {
     viewController.hidesBottomBarWhenPushed = true;
     UIViewController *prev = self.topViewController;
     if (@available(iOS 14.0, *)) {
-            prev.navigationItem.backButtonDisplayMode = UINavigationItemBackButtonDisplayModeMinimal;
+      prev.navigationItem.backButtonDisplayMode =
+          UINavigationItemBackButtonDisplayModeMinimal;
     } else {
-            prev.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
+      prev.navigationItem.backBarButtonItem =
+          [[UIBarButtonItem alloc] initWithTitle:@""
+                                           style:UIBarButtonItemStylePlain
+                                          target:nil
+                                          action:nil];
     }
   }
   [super pushViewController:viewController animated:animated];
@@ -57,9 +65,12 @@
 }
 
 /// Push 一个 VC，若栈中已存在相同 class 的 VC，则先移除旧的再 push 新的。
-- (void)kb_pushViewControllerRemovingSameClass:(UIViewController *)viewController
+- (void)kb_pushViewControllerRemovingSameClass:
+            (UIViewController *)viewController
                                       animated:(BOOL)animated {
-    if (!viewController) { return; }
+  if (!viewController) {
+    return;
+  }
 
   NSMutableArray<UIViewController *> *stack = self.viewControllers.mutableCopy;
   // 移除同 class 的旧 VC（通常只有一个，这里按需移除第一个）
@@ -82,9 +93,11 @@
     viewController.hidesBottomBarWhenPushed = YES;
     UIViewController *prev = stack[stack.count - 2];
     if (@available(iOS 14.0, *)) {
-            prev.navigationItem.backButtonDisplayMode = UINavigationItemBackButtonDisplayModeMinimal;
+      prev.navigationItem.backButtonDisplayMode =
+          UINavigationItemBackButtonDisplayModeMinimal;
     } else {
-            prev.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@""
+      prev.navigationItem.backBarButtonItem =
+          [[UIBarButtonItem alloc] initWithTitle:@""
                                            style:UIBarButtonItemStylePlain
                                           target:nil
                                           action:nil];

keyBoard/Class/Base/VC/BaseTabBarController.m

@@ -15,13 +15,12 @@
 
 #import "BaseNavigationController.h"
 #import "KBAuthManager.h"
-@interface BaseTabBarController ()
+#import "KBCustomTabBar.h"
+#import "Masonry.h"
+@interface BaseTabBarController () <KBCustomTabBarDelegate>
 
-/// 原始的 TabBar appearance（用于恢复）
+/// 自定义 TabBar
-@property(nonatomic, strong)
+@property(nonatomic, strong) KBCustomTabBar *customTabBar;
-    UITabBarAppearance *originalAppearance API_AVAILABLE(ios(13.0));
-@property(nonatomic, strong)
-    UITabBarAppearance *transparentAppearance API_AVAILABLE(ios(13.0));
 
 @end
 
@@ -32,8 +31,6 @@
 
   self.delegate = self;
 
-  [self setupTabbarAppearance];
-
   // 组装 4 个 Tab：首页 / 商城 / 社区 / 我的
   // 图标位于 Assets.xcassets/Tabbar 下：tab_home/tab_home_selected 等
 
@@ -70,7 +67,10 @@
                                       image:@"tab_my"
                                 selectedImg:@"tab_my_selected"];
 
-  self.viewControllers = @[ navHome, navShop, aiMainVC, navMy ];
+  self.viewControllers = @[ navHome, navShop, navCommunity, navMy ];
+
+  // 不隐藏系统 TabBar，而是将自定义视图添加到 TabBar 上
+  [self setupCustomTabBarOnNativeTabBar];
 
   // 测试储存Token
   //    [[KBAuthManager shared] saveAccessToken:@"TEST" refreshToken:nil
@@ -79,68 +79,62 @@
   //    [[KBAuthManager shared] signOut];
 }
 
-- (void)setupTabbarAppearance {
+- (void)setupCustomTabBarOnNativeTabBar {
-  // 让 TabBar 不透明，子控制器 view 不再延伸到 TabBar 下
+  // 1. 持续隐藏原生 TabBar 的所有按钮
-  self.tabBar.translucent = NO;
+  [self hideNativeTabBarButtons];
-  if (@available(iOS 15.0, *)) {
-    UITabBarAppearance *a = [UITabBarAppearance new];
-    [a configureWithOpaqueBackground];
-    a.backgroundColor = [UIColor whiteColor];
-    // 设置选中标题为黑色（iOS 15+ 需通过 appearance）
-    NSDictionary *selAttr =
-        @{NSForegroundColorAttributeName : [UIColor blackColor]};
-    a.stackedLayoutAppearance.selected.titleTextAttributes = selAttr;
-    a.inlineLayoutAppearance.selected.titleTextAttributes = selAttr;
-    a.compactInlineLayoutAppearance.selected.titleTextAttributes = selAttr;
-    self.tabBar.standardAppearance = a;
-    self.tabBar.scrollEdgeAppearance = a;
 
-    // 保存原始 appearance
+  // 2. 创建自定义 TabBar
-    self.originalAppearance = a;
+  NSMutableArray *items = [NSMutableArray array];
-
+  for (UIViewController *vc in self.viewControllers) {
-    // 创建透明 appearance
+    [items addObject:vc.tabBarItem];
-    UITabBarAppearance *transparentA = [UITabBarAppearance new];
-    [transparentA configureWithTransparentBackground];
-    transparentA.backgroundColor = [UIColor clearColor];
-    transparentA.stackedLayoutAppearance.selected.titleTextAttributes = selAttr;
-    transparentA.inlineLayoutAppearance.selected.titleTextAttributes = selAttr;
-    transparentA.compactInlineLayoutAppearance.selected.titleTextAttributes =
-        selAttr;
-    self.transparentAppearance = transparentA;
-  } else if (@available(iOS 13.0, *)) {
-    UITabBarAppearance *a = [UITabBarAppearance new];
-    [a configureWithOpaqueBackground];
-    a.backgroundColor = [UIColor whiteColor];
-    NSDictionary *selAttr =
-        @{NSForegroundColorAttributeName : [UIColor blackColor]};
-    a.stackedLayoutAppearance.selected.titleTextAttributes = selAttr;
-    a.inlineLayoutAppearance.selected.titleTextAttributes = selAttr;
-    a.compactInlineLayoutAppearance.selected.titleTextAttributes = selAttr;
-    self.tabBar.standardAppearance = a;
-    self.tabBar.tintColor = [UIColor blackColor];
-
-    // 保存原始 appearance
-    self.originalAppearance = a;
-
-    // 创建透明 appearance
-    UITabBarAppearance *transparentA = [UITabBarAppearance new];
-    [transparentA configureWithTransparentBackground];
-    transparentA.backgroundColor = [UIColor clearColor];
-    transparentA.stackedLayoutAppearance.selected.titleTextAttributes = selAttr;
-    transparentA.inlineLayoutAppearance.selected.titleTextAttributes = selAttr;
-    transparentA.compactInlineLayoutAppearance.selected.titleTextAttributes =
-        selAttr;
-    self.transparentAppearance = transparentA;
-  } else {
-    // 老系统用 tintColor/appearance 做回退
-    self.tabBar.tintColor = [UIColor blackColor];
-    [[UITabBarItem appearance] setTitleTextAttributes:@{
-      NSForegroundColorAttributeName : [UIColor blackColor]
   }
-                                             forState:UIControlStateSelected];
+
+  self.customTabBar = [[KBCustomTabBar alloc] initWithItems:items];
+  self.customTabBar.delegate = self;
+
+  // 3. 设置 frame 覆盖整个 TabBar 区域
+  self.customTabBar.frame = self.tabBar.bounds;
+
+  // 4. 使用 autoresizingMask 自动适配尺寸变化
+  self.customTabBar.autoresizingMask =
+      UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+
+  // 5. 将自定义 TabBar 添加到原生 TabBar 上
+  [self.tabBar addSubview:self.customTabBar];
+
+  // 6. 禁用原生 TabBar 的交互，只让自定义视图响应
+  self.tabBar.userInteractionEnabled = YES;
+  for (UIView *subview in self.tabBar.subviews) {
+    if (subview != self.customTabBar &&
+        ![NSStringFromClass([subview class]) containsString:@"Background"]) {
+      subview.userInteractionEnabled = NO;
+      subview.hidden = YES;
     }
   }
 
+  // 7. 设置初始背景色（默认选中索引0，白色背景）
+  [self.customTabBar setTransparentBackground:NO];
+}
+
+- (void)hideNativeTabBarButtons {
+  // 移除或隐藏原生 TabBar 的所有子视图（按钮等）
+  for (UIView *subview in self.tabBar.subviews) {
+    // 保留系统的 _UIBarBackground 背景视图，隐藏其他视图
+    if (![NSStringFromClass([subview class]) containsString:@"Background"] &&
+        subview != self.customTabBar) {
+      subview.hidden = YES;
+      subview.alpha = 0;
+    }
+  }
+}
+
+- (void)viewWillAppear:(BOOL)animated {
+  [super viewWillAppear:animated];
+
+  // 每次视图即将出现时，确保原生按钮被隐藏
+  [self hideNativeTabBarButtons];
+}
+
 // 统一构造 TabBarItem，原图渲染，避免被系统 Tint 着色
 - (UITabBarItem *)tabItemWithTitle:(NSString *)title
                              image:(NSString *)imageName
@@ -155,59 +149,24 @@
   return item;
 }
 
-#pragma mark - UITabBarControllerDelegate
+#pragma mark - KBCustomTabBarDelegate
 
-- (BOOL)tabBarController:(UITabBarController *)tabBarController
+- (void)customTabBar:(KBCustomTabBar *)tabBar
-    shouldSelectViewController:(UIViewController *)viewController {
+    didSelectItemAtIndex:(NSInteger)index {
-  // 已经是当前选中的 tab，直接允许（避免重复拦截）
+  // 登录检查
-  if (tabBarController.selectedViewController == viewController) {
-    return YES;
-  }
-
-  NSUInteger index =
-      [tabBarController.viewControllers indexOfObject:viewController];
-  if (index == NSNotFound) {
-    return YES;
-  }
-
-  // “我的” tab 默认为第 4 个（索引 3），未登录时先跳转登录页
   if ((index == 1 || index == 2) && ![KBUserSessionManager shared].isLoggedIn) {
     [[KBUserSessionManager shared] goLoginVC];
-    return NO;
+    return;
   }
 
-  return YES;
+  // 切换 VC
-}
+  self.selectedIndex = index;
 
-- (void)tabBarController:(UITabBarController *)tabBarController
+  // 设置 TabBar 背景（索引2是 KBAiMainVC）
-    didSelectViewController:(UIViewController *)viewController {
-  NSUInteger index =
-      [tabBarController.viewControllers indexOfObject:viewController];
-
-  // 第三个 tab（索引2）是 KBAiMainVC，背景透明
   if (index == 2) {
-    if (@available(iOS 13.0, *)) {
+    [self.customTabBar setTransparentBackground:YES];
-      self.tabBar.standardAppearance = self.transparentAppearance;
-      if (@available(iOS 15.0, *)) {
-        self.tabBar.scrollEdgeAppearance = self.transparentAppearance;
-      }
   } else {
-      // iOS 13 以下，直接设置背景色
+    [self.customTabBar setTransparentBackground:NO];
-      self.tabBar.barTintColor = [UIColor clearColor];
-      self.tabBar.backgroundColor = [UIColor clearColor];
-    }
-  } else {
-    // 其他 tab，恢复原始背景
-    if (@available(iOS 13.0, *)) {
-      self.tabBar.standardAppearance = self.originalAppearance;
-      if (@available(iOS 15.0, *)) {
-        self.tabBar.scrollEdgeAppearance = self.originalAppearance;
-      }
-    } else {
-      // iOS 13 以下，恢复白色背景
-      self.tabBar.barTintColor = [UIColor whiteColor];
-      self.tabBar.backgroundColor = [UIColor whiteColor];
-    }
   }
 }