ios在AppDelegate中更改了tabbaritem的徽章

Question

哦！我尝试更改tabbarItem中AppDelegate的徽章;然后它确实有效，但tabarItem没有显示！我的代码：

 UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    UITabBarController *tabBarController = (UITabBarController *)[storyBoard instantiateViewControllerWithIdentifier:@"MainIdentifier"];

    [[tabBarController.tabBar.items objectAtIndex:1] setBadgeValue:[NSString stringWithFormat:@"199"]];

（我也看到网站How to set tabBarItem's badge from AppDelegate.m (tabBarView is not root View)）

Answer 1

您可以提交原始答案here by Jim Rota

访问标签栏控制器：“

UITabBarController *tabController = (UITabBarController *)self.window.rootViewController;

然后设置徽章

[[tabController.viewControllers objectAtIndex:1] tabBarItem].badgeValue = @"New!";