+(void) showSplashScreen
{
    UIView *mainScreen = [[[UIApplication sharedApplication]delegate]window];

    UIView *windowBlocker = [[UIView alloc]initWithFrame:mainScreen.frame];
    windowBlocker.tag = 999;
    windowBlocker.backgroundColor = [UIColor clearColor];

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake((mainScreen.frame.size.width), (mainScreen.frame.size.height), 50, 50)];
    imageView.layer.backgroundColor=[[UIColor colorWithRed:200 green:0 blue:0 alpha:0.5] CGColor];

    imageView.layer.cornerRadius=10;
    imageView.layer.masksToBounds = YES;
    [windowBlocker addSubview:imageView];

    UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    [windowBlocker addSubview:spinner];
    spinner.center = mainScreen.center;
    [spinner startAnimating];
}

-(void)viewWillAppear:(BOOL)animated    {
    [super viewWillAppear:animated];
    [self performSelector:@selector(addSplash) withObject:nil afterDelay:0.5];
}

-(void)addSplash    {
    [[self class] showSplashScreen];
}

+(void) showSplashScreen
{
    UIView *mainScreen = [[[UIApplication sharedApplication]delegate]window];

    UIView *windowBlocker = [[UIView alloc]initWithFrame:mainScreen.frame];
    windowBlocker.tag = 999;
    windowBlocker.backgroundColor = [UIColor redColor];

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake((mainScreen.frame.size.width), (mainScreen.frame.size.height), 50, 50)];
    imageView.layer.backgroundColor=[[UIColor colorWithRed:200 green:0 blue:0 alpha:0.5] CGColor];

    imageView.layer.cornerRadius=10;
    imageView.layer.masksToBounds = YES;
    [windowBlocker addSubview:imageView];

    UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    [windowBlocker addSubview:spinner];
    spinner.center = mainScreen.center;
    [spinner startAnimating];

    [[[[UIApplication sharedApplication]delegate]window] addSubview:windowBlocker];

}

-(void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [[self class] showSplashScreen];
}

UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    [imageView addSubview:spinner];
    spinner.center = mainScreen.center;
    [windowBlocker addSubview:imageView];
    [self.view addSubview: mainScreen];
    [spinner startAnimating];

[Self.view addSubview:windowBlocker];


UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    spinner.center = mainScreen.center;
    [spinner startAnimating];
    [windowBlocker addSubview:spinner];

[mainScreen addSubview:windowBlocker];

UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
       spinner.color=[UIColor greenColor];
       spinner.center = self.view.center;
      [spinner startAnimating];
      [windowBlocker addSubview:spinner];