ios 26 使用hbd_barAlpha问题

[htyo]

在iOS26上使用hbd_barAlpha = 0.0之后，在模拟器会把navigationItem.leftBarButtonItem和title都隐藏。

[liuhedong01]

一样，解决了吗大佬

[htyo]

一样，解决了吗大佬

没有！期待作者后续更新

[winfast]

我也遇到这样的问题， 经过研究发现有一段代码是这的

• (UIView *)hbd_backgroundView {
  // UIView *view = [self valueForKeyPath:@"_backgroundView"];
  return [self getViewFromContext:self withKeyPath:@"_backgroundView"];
  }

在iOS26以下，返回的是_UIBarBackground的类， 但是在iOS26 返回的_UINavigationBarContentView类型
当我把HBDNavigationBar文件- (UIView *)getViewFromContext:(id)context withKeyPath:(NSString *)keyPath 这个函数中
把 if ([NSStringFromClass(item.class) containsString:@"ContentView"]) 修改成下面的代码后，就解决了问题
if ([NSStringFromClass(item.class) containsString:@"background"])

期待作者帮我看看有没有引起其它问题

[htyo]

if ([NSStringFromClass(item.class) containsString:@"background"])

感谢你提供的方法，能解决我目前的问题。现在还存在一个问题，当我使用下面方法创建返回键时，不响应。
@implementation LDNavigationController

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view.
  }

• (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {

  if (self.viewControllers.count > 0) {
  viewController.hidesBottomBarWhenPushed = YES;
  NSString * navigation_btn_back = @"common_navigationbar_back";
  UIBarButtonItem *leftBtn = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed: navigation_btn_back] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]
  style:UIBarButtonItemStylePlain
  target:viewController
  action:@selector(navigationBarBackController:)];
  viewController.navigationItem.leftBarButtonItem = leftBtn;
  }
  [super pushViewController:viewController animated:animated];
  }

@EnD
问题出现在使用UIBarButtonItem，不知道什么原因导致的。我使用下面方法则可。

• (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {

  if (self.viewControllers.count > 0) {
  viewController.hidesBottomBarWhenPushed = YES;
  UIImage * leftBarButtonimage = [UIImage imageNamed:@"common_navigationbar_back"];
  UIButton * rightBarButton = [UIButton buttonWithType:UIButtonTypeCustom];
  rightBarButton.frame = CGRectMake(0,0,leftBarButtonimage.size.width, leftBarButtonimage.size.height);
  [rightBarButton addTarget:viewController action:@selector(navigationBarBackController:) forControlEvents:UIControlEventTouchDown];
  [rightBarButton setBackgroundImage:leftBarButtonimage forState:UIControlStateNormal];

    UIBarButtonItem * rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:rightBarButton];
    viewController.navigationItem.leftBarButtonItem = rightBarButtonItem;
  

  }
  [super pushViewController:viewController animated:animated];
  }
  这里还有问题，哪怕使用的自动生成的返回键也没有点击事件。
  问题似乎是 设置了hbd_barAlpha = 0.0，导致点击事件失去了焦点。目前还未找到决绝方法，只能用上面方法过度。

[winfast]

if ([NSStringFromClass(item.class) containsString:@"background"])

感谢你提供的方法，能解决我目前的问题。现在还存在一个问题，当我使用下面方法创建返回键时，不响应。 @implementation LDNavigationController

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view.
  }
• (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
  if (self.viewControllers.count > 0) {
  viewController.hidesBottomBarWhenPushed = YES;
  NSString * navigation_btn_back = @"common_navigationbar_back";
  UIBarButtonItem *leftBtn = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed: navigation_btn_back] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]
  style:UIBarButtonItemStylePlain
  target:viewController
  action:@selector(navigationBarBackController:)];
  viewController.navigationItem.leftBarButtonItem = leftBtn;
  }
  [super pushViewController:viewController animated:animated];
  }

@EnD 问题出现在使用UIBarButtonItem，不知道什么原因导致的。我使用下面方法则可。

• (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
  if (self.viewControllers.count > 0) {
  viewController.hidesBottomBarWhenPushed = YES;
  UIImage * leftBarButtonimage = [UIImage imageNamed:@"common_navigationbar_back"];
  UIButton * rightBarButton = [UIButton buttonWithType:UIButtonTypeCustom];
  rightBarButton.frame = CGRectMake(0,0,leftBarButtonimage.size.width, leftBarButtonimage.size.height);
  [rightBarButton addTarget:viewController action:@selector(navigationBarBackController:) forControlEvents:UIControlEventTouchDown];
  [rightBarButton setBackgroundImage:leftBarButtonimage forState:UIControlStateNormal];

    UIBarButtonItem * rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:rightBarButton];
    viewController.navigationItem.leftBarButtonItem = rightBarButtonItem;
  

  }
  [super pushViewController:viewController animated:animated];
  }
  这里还有问题，哪怕使用的自动生成的返回键也没有点击事件。
  问题似乎是 设置了hbd_barAlpha = 0.0，导致点击事件失去了焦点。目前还未找到决绝方法，只能用上面方法过度。

我稍微看了一下代码，我给你的建议 是不要在push之前创建这个导航栏按钮

[htyo]

切回 1.9.8 版本 hbd_barAlpha 就没有了，目前能满足我的需求

[iBringer]

修改HBDNavigationBar.m中的 getViewFromContext 方法

- (UIView *)getViewFromContext:(id)context withKeyPath:(NSString *)keyPath {
    if (!context || !keyPath) {
        return nil;
    }

    if (@available(iOS 26.0, *)) {
        // 性能优化：缓存查找结果
        static NSCache *viewCache = nil;
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            viewCache = [[NSCache alloc] init];
            viewCache.countLimit = 10;
        });
        
        // 创建缓存键
        NSString *cacheKey = [NSString stringWithFormat:@"%@_%@", [context class], keyPath];
        
        // 修复：检查缓存中是否有有效结果
        id cachedResult = [viewCache objectForKey:cacheKey];
        if (cachedResult) {
            //处理 NSNull 情况
            if (cachedResult == [NSNull null]) {
                return nil;
            } else if ([cachedResult isKindOfClass:[UIView class]]) {
                return (UIView *)cachedResult;
            }
        }
        
        UIView *result = nil;
        
        // 如果 context 是 UIView，尝试查找背景视图
        if ([context isKindOfClass:[UIView class]]) {
            UIView *view = (UIView *)context;
            
            // 性能优化：使用快速枚举替代 block
            for (UIView *subview in view.subviews) {
                NSString *className = NSStringFromClass([subview class]);
                if ([className containsString:@"background"]) {
                    result = subview;
                    break;
                }
            }
            
            if (result) {
                [viewCache setObject:result forKey:cacheKey];
                return result;
            }
        }

        // 使用 Ivar 查找作为备选方案
        NSArray *components = [keyPath componentsSeparatedByString:@"."];
        if (components.count >= 2) {
            NSString *providerKey = components.firstObject;
            NSObject *provider = [context valueForKey:providerKey];
            
            if (provider) {
                result = [self findViewInProvider:provider withTargetKey:components.lastObject];
                
                if (result) {
                    [viewCache setObject:result forKey:cacheKey];
                    return result;
                }
            }
        }
        
        //缓存 NSNull 而不是 nil
        [viewCache setObject:[NSNull null] forKey:cacheKey];
        return nil;
    }

    // iOS 26.0 以下，直接通过 KVC 获取
    return [context valueForKeyPath:keyPath];
}

// 提取 Ivar 查找逻辑到单独方法
- (UIView *)findViewInProvider:(NSObject *)provider withTargetKey:(NSString *)targetKey {
    if (!provider || !targetKey) return nil;
    
    unsigned int ivarCount = 0;
    Ivar *ivars = class_copyIvarList([provider class], &ivarCount);
    
    if (!ivars) return nil;
    
    UIView *result = nil;
    
    // 性能优化：限制遍历次数，优先查找精确匹配
    for (unsigned int i = 0; i < ivarCount && !result; i++) {
        Ivar ivar = ivars[i];
        const char *ivarName = ivar_getName(ivar);
        
        if (!ivarName) continue;
        
        NSString *ivarNameString = [NSString stringWithUTF8String:ivarName];
        
        // 性能优化：优先精确匹配，再尝试包含匹配
        if ([ivarNameString isEqualToString:targetKey] ||
            [ivarNameString isEqualToString:[@"_" stringByAppendingString:targetKey]]) {
            result = object_getIvar(provider, ivar);
            break;
        }
        
        if ([ivarNameString containsString:targetKey]) {
            result = object_getIvar(provider, ivar);
            // 不立即退出，继续寻找更精确的匹配
        }
    }
    
    free(ivars);
    return result;
}