AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // 不透明な黒にする
    [application setStatusBarStyle:UIStatusBarStyleBlackOpaque animated:YES];

	// 半透明の黒にする
	[application setStatusBarStyle:UIStatusBarStyleBlackTranslucent animated:YES];
    
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    
    // Override point for customization after application launch.
    UIViewController *testAppController = [[[testAppController alloc] initWithNibName:@"testAppView" bundle:nil] autorelease];
    
    self.tabBarController = [[[UITabBarController alloc] init] autorelease];
    self.tabBarController.viewControllers = [NSArray testAppController, nil];
    self.window.rootViewController = self.tabBarController;
    
    [self.window makeKeyAndVisible];
    return YES;
}