AppDelegate动态加载StoryBoard

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

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

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];

    self.window.rootViewController=[storyboard instantiateInitialViewController];

    [self.window makeKeyAndVisible];

    return YES;
}