修改引导逻辑

keyBoard/Class/Base/VC/BaseNavigationController.m

@@ -15,12 +15,31 @@
 
 - (void)viewDidLoad {
     [super viewDidLoad];
-    // Do any additional setup after loading the view.
+    // 统一返回箭头样式与颜色
+    UIImage *backImg = [UIImage imageNamed:@"back_black_icon"];
+    if (backImg) {
+        // 使用自定义返回指示图标；mask 用同一张图片
+        self.navigationBar.backIndicatorImage = backImg;
+        self.navigationBar.backIndicatorTransitionMaskImage = backImg;
+    }
+    self.navigationBar.tintColor = [UIColor blackColor]; // 箭头/按钮的着色
+
+    // iOS 14+ 可以统一隐藏返回标题，避免出现“首页”字样
+    if (@available(iOS 14.0, *)) {
+        self.navigationBar.topItem.backButtonDisplayMode = UINavigationItemBackButtonDisplayModeMinimal;
+    }
 }
 
 - (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
     if (self.viewControllers.count > 0) {
         viewController.hidesBottomBarWhenPushed = true;
+        // 隐藏上一页提供的返回标题（如“首页”），只保留箭头
+        UIViewController *prev = self.topViewController;
+        if (@available(iOS 14.0, *)) {
+            prev.navigationItem.backButtonDisplayMode = UINavigationItemBackButtonDisplayModeMinimal;
+        } else {
+            prev.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
+        }
     }
     [super pushViewController:viewController animated:animated];
 }

keyBoard/Class/Guard/VC/KBGuideVC.m

@@ -46,7 +46,7 @@ typedef NS_ENUM(NSInteger, KBGuideItemType) {
 
     [self.tableView mas_makeConstraints:^(MASConstraintMaker *make) {
         make.top.left.right.equalTo(self.view);
-        make.bottom.equalTo(self.inputBar.mas_top);
+        make.bottom.equalTo(self.view);
     }];
 
     [self.inputBar mas_makeConstraints:^(MASConstraintMaker *make) {
@@ -108,22 +108,23 @@ typedef NS_ENUM(NSInteger, KBGuideItemType) {
 
     [self kb_preparePermissionOverlayIfNeeded];
     BOOL show = needGuide;
-    [UIView performWithoutAnimation:^{
+//    [UIView performWithoutAnimation:^{
         self.permVC.view.hidden = !show;
-    }];
+//    }];
 }
 
 /// 提前创建权限引导页覆盖层（仅一次）
 - (void)kb_preparePermissionOverlayIfNeeded {
     if (self.permVC) return;
     KBPermissionViewController *guide = [KBPermissionViewController new];
-    guide.modalPresentationStyle = UIModalPresentationFullScreen; // 仅用于内部布局，不会真正 present
+//    guide.modalPresentationStyle = UIModalPresentationFullScreen; // 仅用于内部布局，不会真正 present
     KBWeakSelf;
     guide.backHandler = ^{ [weakSelf.navigationController popViewControllerAnimated:YES]; };
     self.permVC = guide;
+    guide.backButton.hidden = true;
     [self addChildViewController:guide];
     [self.view addSubview:guide.view];
-    [guide.view mas_makeConstraints:^(MASConstraintMaker *make) { make.edges.equalTo(self.view); }];
+//    [guide.view mas_makeConstraints:^(MASConstraintMaker *make) { make.edges.equalTo(self.view); }];
     [guide didMoveToParentViewController:self];
     guide.view.hidden = YES; // 初始隐藏
 }
@@ -172,12 +173,10 @@ typedef NS_ENUM(NSInteger, KBGuideItemType) {
     self.inputBarBottom.offset = offset;
 
     [UIView animateWithDuration:duration delay:0 options:curve animations:^{
-        [self.view layoutIfNeeded];
-        // 留出输入栏高度的 contentInset，避免最后一行被遮挡
         UIEdgeInsets inset = self.tableView.contentInset;
         inset.bottom = 52 + MAX(kbHeight - safeBtm, 0);
         self.tableView.contentInset = inset;
-        self.tableView.scrollIndicatorInsets = inset;
+//        self.tableView.scrollIndicatorInsets = inset;
     } completion:^(BOOL finished) {
         [self scrollToBottomAnimated:YES];
     }];

keyBoard/VC/KBPermissionViewController.h

@@ -14,6 +14,7 @@ NS_ASSUME_NONNULL_BEGIN
 /// 点击页面左上角“返回”时回调。用于让调用方（如 KBGuideVC）一起退出等自定义行为。
 /// 注意：避免与按钮 action `onBack` 重名，故命名为 backHandler。
 @property (nonatomic, copy, nullable) void (^backHandler)(void);
+@property (nonatomic, strong) UIButton *backButton;   // 左上角返回
 
 @end
 

keyBoard/VC/KBPermissionViewController.m

@@ -6,10 +6,8 @@
 //
 
 #import "KBPermissionViewController.h"
-#import <TargetConditionals.h>
 
 @interface KBPermissionViewController ()
-@property (nonatomic, strong) UIButton *backButton;   // 左上角返回
 @property (nonatomic, strong) UILabel *titleLabel;    // 标题
 @property (nonatomic, strong) UILabel *tipsLabel;     // 步骤提示
 @property (nonatomic, strong) UIView *cardView;       // 中部卡片