此平台不支持libMobileGestalt.c:890:mgisDeviceNeofType

我正在用一本旧书(出于个人原因)研究ObjC的iOS开发,当我重写 使用选项完成启动 从 所以我通过设置一个 ,如下所示:

 -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

    RootController *rootController = [[RootController alloc] init];

    UINavigationController  *navController = [[UINavigationController alloc]initWithRootViewController:rootController];

    self.window.rootViewController = navController;

    [self.window makeKeyAndVisible];

    [rootController release];

    [navController release];

    return YES;
}

Xcode 10.0(10A255)

在iPhone和模拟器上工作过(都是iphone7-ios12)