iOS开发手记 - iOS9.3 UINavigationController添加后不显示storyboard中viewcontroller里的控件的解决方法

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    ViewController *firstVC = [[ViewController alloc] init];
    UINavigationController *naviController = [[UINavigationController alloc] initWithRootViewController:firstVC];
    self.window.rootViewController = naviController;
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}
 
- (BOOL)application:(UIA