iOS 7 launch image (splash screen) fades out

I have managed to do that in the AppController. Just place this code right after the creation of the glView

    UIImage* image = [UIImage imageNamed:[self getLaunchImageName]];
if ([[UIScreen mainScreen] respondsToSelector: @selector(scale)])
{
    float screenScale = [[UIScreen mainScreen] scale];
    if (screenScale > 1.)
        image = [UIImage imageWithCGImage:image.CGImage scale:screenScale orientation:image.imageOrientation];
}
UIImageView *splashView = [[UIImageView alloc] initWithImage:image];
[viewController.view addSubview:splashView];
[splashView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0.1f];

It is easy. Just get the launch image and make it disappear after a delay. You will need the getLaunchImage code (based on this comment, not tested with iPhone 6 nor 6 plus)

    -(NSString*)getLaunchImageName
{

    NSArray* images= @[@"LaunchImage.png",
                       @"LaunchImage@2x.png",
                       @"LaunchImage-700@2x.png",
                       @"LaunchImage-568h@2x.png",
                       @"LaunchImage-700-568h@2x.png",
                       @"LaunchImage-700-Portrait@2x~ipad.png",
                       @"LaunchImage-Portrait@2x~ipad.png",
                       @"LaunchImage-700-Portrait~ipad.png",
                       @"LaunchImage-Portrait~ipad.png",
                       @"LaunchImage-Landscape@2x~ipad.png",
                       @"LaunchImage-700-Landscape@2x~ipad.png",
                       @"LaunchImage-Landscape~ipad.png",
                       @"LaunchImage-700-Landscape~ipad.png",
                       @"LaunchImage-800-667h@2x.png",
                       @"LaunchImage-800-Portrait-736h@3x.png",
                       @"LaunchImage-800-Landscape-736h@3x.png",
                       ];

    UIImage *splashImage;

    if ([self isDeviceiPhone])
    {
        if ([self isDeviceiPhone4] && [self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[1]];
            if (splashImage.size.width!=0)
                return images[1];
            else
                return images[2];
        }
        else if ([self isDeviceiPhone5])
        {
            splashImage = [UIImage imageNamed:images[1]];
            if (splashImage.size.width!=0)
                return images[3];
            else
                return images[4];
        }
        else if ([self isDeviceiPhone6])
        {
            splashImage = [UIImage imageNamed:images[1]];
            if (splashImage.size.width!=0)
                return images[13];
            else
                return images[14];
        }
        else
            return images[0]; //Non-retina iPhone
    }
    else if ([[UIDevice currentDevice] orientation]==UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown)//iPad Portrait
    {
        if ([self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[5]];
            if (splashImage.size.width!=0)
                return images[5];
            else
                return images[6];
        }
        else
        {
            splashImage = [UIImage imageNamed:images[7]];
            if (splashImage.size.width!=0)
                return images[7];
            else
                return images[8];
        }

    }
    else
    {
        if ([self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[9]];
            if (splashImage.size.width!=0)
                return images[9];
            else
                return images[10];
        }
        else
        {
            splashImage = [UIImage imageNamed:images[11]];
            if (splashImage.size.width!=0)
                return images[11];
            else
                return images[12];
        }
    }
}

-(BOOL)isDeviceiPhone
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
    {
        return TRUE;
    }

    return FALSE;
}

-(BOOL)isDeviceiPhone4
{
    if ([[UIScreen mainScreen] bounds].size.height==480)
        return TRUE;

    return FALSE;
}


-(BOOL)isDeviceRetina
{
    if ([[UIScreen mainScreen] respondsToSelector:@selector(displayLinkWithTarget:selector:)] &&
        ([UIScreen mainScreen].scale == 2.0))        // Retina display
    {
        return TRUE;
    }
    else                                          // non-Retina display
    {
        return FALSE;
    }
}


-(BOOL)isDeviceiPhone5
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone && [[UIScreen mainScreen] bounds].size.height==568)
    {
        return TRUE;
    }
    return FALSE;
}

-(BOOL)isDeviceiPhone6
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone && [[UIScreen mainScreen] bounds].size.height>568)
    {
        return TRUE;
    }
    return FALSE;
}