iOSで遅延起動させてみた その2 ローディング画面->起動画面への遷移

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    
    // ローディング画面
    self.viewControllerA = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    // 起動画面とする
    self.viewControllerB = [[[MainViewController alloc] initWithNibName:@"MainViewController" bundle:nil] autorelease];

    // まずはローディング画面を表示するでござる
    self.window.rootViewController = self.viewControllerA;
    [self.window makeKeyAndVisible];
    return YES;
}

- (void) startApplication {
    // ホーム画面に切り替えるでござる
    self.window.rootViewController = self.viewControllerB;
}

ViewController.m

// ローディング画面のロード
- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    
    NSMutableURLRequest* req = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://ch3cooh.jp/"]];
    [NSURLConnection sendAsynchronousRequest:req
                                       queue:[NSOperationQueue mainQueue]
                           completionHandler:^(NSURLResponse *res, NSData *data, NSError *error) {
                               
                               // なんか重たい処理とかやってる
                               [NSThread sleepForTimeInterval:5];
                               
                               dispatch_async(dispatch_get_main_queue(), ^{
                                   
                                   id appDelegate = [[UIApplication sharedApplication] delegate];
                                   [appDelegate performSelector:@selector(startApplication)];
                                   
                               });
                           }];
}