objective-c - UITabBar与UINavigation混用的问题,导航栏没显示

问题描述

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. self.window=[[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]]; self.window.backgroundColor=[UIColor whiteColor]; //创建子控制器 wechatViewController *wechat=[[wechatViewController alloc]init]; wechat.title=@'微信'; UINavigationController *wechatNav=[[UINavigationController alloc]initWithRootViewController:wechat]; wechat.view.backgroundColor=[UIColor redColor];concactsViewController *concacts=[[concactsViewController alloc]init]; concacts.title=@'通信录'; UINavigationController *concactsNav=[[UINavigationController alloc]initWithRootViewController:concacts]; concacts.view.backgroundColor=[UIColor yellowColor];meViewController *me=[[meViewController alloc]init]; UINavigationController *meNav=[[UINavigationController alloc]initWithRootViewController:me]; me.title=@'我'; me.view.backgroundColor=[UIColor blackColor];discoverViewController *discover=[[discoverViewController alloc]init]; UINavigationController *discoverNav=[[UINavigationController alloc]initWithRootViewController:discover]; discover.title=@'朋友圈'; discover.view.backgroundColor=[UIColor blueColor];

UITabBarController *tb=[[UITabBarController alloc]init]; tb.viewControllers=@[wechat,concacts,discover,me]; self.window.rootViewController=tb; [self.window makeKeyAndVisible]; return YES;}

问题解答

tb.viewControllers=@[wechatNav,concactsNav,discoverNav,meNav];