How to make custom splash screen in iphone sdk

you write the following code in appdelegate.m///////////

UIImage* image=[UIImage imageNamed:@"splash.png"];
    splashView=[[UIImageView alloc]initWithImage:image];
    [self.window addSubview:splashView];
    [self.window bringSubviewToFront:splashView];
    [self performSelector:@selector(removeSplash) withObject:self afterDelay:2];
    [self.window makeKeyAndVisible];


-(void)removeSplash{
   
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationTransition:UIViewAnimationTransitionNone forView:self.window cache:YES];
    [UIView setAnimationDuration:0.75];
    [UIView setAnimationDelegate:self];
    [splashView removeFromSuperview];
    [UIView commitAnimations];
    [self.window addSubview:self.viewController.view];

}