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];
 }