self.window= [[UIWindowalloc]initWithFrame:[UIScreenmainScreen].bounds];
UITabBarController* tabBarController = [[UITabBarControlleralloc]init];
VCSecond* second =[[VCSecondalloc]init];
UITabBarItem* secondtabBar = [[UITabBarItemalloc]initWithTabBarSystemItem:UITabBarSystemItemTopRatedtag:103];
secondtabBar.badgeValue=@"22";
second.tabBarItem= secondtabBar;
VCThird* third =[[VCThirdalloc]init];
UITabBarItem* tabBar = [[UITabBarItemalloc]initWithTabBarSystemItem:UITabBarSystemItemBookmarkstag:102];
tabBar.badgeValue=@"21";
third.tabBarItem= tabBar;
tabBarController.viewControllers=@[
second,third
];
tabBarController.selectedIndex=1;
self.window.rootViewController= tabBarController;
[self.windowmakeKeyAndVisible];
