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Tab bar does not appear in iOS(IOS中未显示选项卡栏)

转载 作者：bug小助手 更新时间：2023-10-25 19:25:56 25 4
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I am trying to make an iOS hybrid app, but I'm stuck on the first step;
my app does not show its tab bar like this pic tab bar not show

我正在尝试制作一款iOS混合应用程序，但我停留在第一步；我的应用程序没有像这个图片选项卡栏那样显示它的选项卡栏


My debug result shows in UITabBarController the self.tabBar.subviews.subviews is empty when i try to traverse it, it throw an exception;error

我的调试结果显示，在UITabBarController中，self.tabBar.subviews.subviews为空。当我尝试遍历它时，它抛出异常；错误


here is the code;

以下是代码；


// AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    BaseTabbarViewController *tabbarVC = [[BaseTabbarViewController alloc]init];
    self.window.rootViewController = tabbarVC;
    [self.window makeKeyAndVisible];
    return YES;
}
//BaseTabbarViewController.m`
- (void)viewDidLoad {
    [super viewDidLoad];
    self.tabBar.barTintColor = [UIColor whiteColor];
    [self setupChildVC];
    self.indexFlag = 0;
}
- (void)setupChildVC {
    OKRWebViewController *okrMainVC = [[OKRWebViewController alloc] initWithConfig:@"http://192.168.2.183:8080/OKRMain?enable_bounds=0&hide_scroll_bar=1"];
    [self setupTabbarItem:okrMainVC.tabBarItem title:@"main" titleSize:12 titleFontName:@"HeiTi SC" normalTitleColor:[UIColor grayColor] selectedTitleColor:[UIColor purpleColor] normalImage:@"tabbar_about_normal" selectedImage:@"tabar_select2"];
    OKRWebViewController *okrMainVC2 = [[OKRWebViewController alloc] initWithConfig:@"http://192.168.2.183:8080/OKRMain?enable_bounds=0&hide_scroll_bar=1"];
    [self setupTabbarItem:okrMainVC2.tabBarItem title:@"order" titleSize:12 titleFontName:@"HeiTi SC" normalTitleColor:[UIColor grayColor] selectedTitleColor:[UIColor purpleColor] normalImage:@"tabbar_order_normal" selectedImage:@"tabar_select2"];
    BaseNavigationController *navA = [[BaseNavigationController alloc]initWithRootViewController:okrMainVC];
    BaseNavigationController *navB = [[BaseNavigationController alloc]initWithRootViewController:okrMainVC2];
    self.viewControllers = @[navA,navB];
}
- (void)upAnimationWithIndex:(NSInteger)index {
    NSMutableArray *tabBarButtonImageArray = [NSMutableArray array];
    for (UIControl *tabBarButton in self.tabBar.subviews) {
        if ([tabBarButton isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
            for (UIView *imageView in tabBarButton.subviews) { // throw exception
                if ([imageView isKindOfClass:NSClassFromString(@"UITabBarSwappableImageView")]) {
                    [tabBarButtonImageArray addObject:imageView];
                }
            }
        }
    }
}

found some demos and I forked the code but that didn't work either, I'm not sure if different configurations would cause the issue;

我发现了一些演示，我编写了代码，但这也不起作用，我不确定不同的配置是否会导致问题；


https://github.com/PrincessSmall/TabBarConteollerDemo#tabbarconteollerdemo

Https://github.com/PrincessSmall/TabBarConteollerDemo#tabbarconteollerdemo


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