ios - 标签栏不出现

Question

该项目的标签栏没有显示，而是只显示一个黑屏。此标签栏在应用程序委托中的应用程序启动中实用地进入。

main_tab=[[UITabBarController alloc]init];
viewcontroller = [[HomeViewController alloc]init];
viewcontroller.title =@"Home";
UINavigationController *nav =[[UINavigationController alloc]initWithRootViewController:viewcontroller];

viewcontroller1 = [[SearchViewController alloc]init];
viewcontroller1.title =@"Search";
UINavigationController *nav1 =[[UINavigationController alloc]initWithRootViewController:viewcontroller1];


tabs_array=[[NSArray alloc]initWithObjects:nav,nav1, nil];
main_tab.viewControllers=tabs_array;
[self.window addSubview:main_tab.view];
[self.window makeKeyAndVisible];

return YES;

Answer 1

尝试替换此行

   [self.window addSubview:main_tab.view];

有了这个

    self.window.rootViewController = main_tab;