Alertview with Activity inidicator

Alert View Snippet

UIActivityIndicatorView *activityView;
UIAlertView *waitAlertView;

// delegate method of alert view
- (void)willPresentAlertView:(UIAlertView *) currAlertView {
    
    if ( waitAlertView == currAlertView) {
        activityView.center = CGPointMake( waitAlertView.bounds.size.width / 2, waitAlertView.bounds.size.height / 2 );
    }
}

// create alert view with indicator
- (void)showAction{
    
    // create alert view with activity indicatord
    waitAlertView = [[UIAlertView alloc] initWithTitle:nil
                                               message:nil
                                              delegate:self
                                     cancelButtonTitle:nil
                                     otherButtonTitles:nil];
    
    activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    float frameX = self.view.frame.size.width / 2.0f;
    float frameY = self.view.frame.size.height / 2.0f;
    CGPoint viewCenter = CGPointMake(frameX, frameY);
    activityView.center = viewCenter;
    
    [waitAlertView addSubview:activityView];
}

// call alertview with indicator view animated
    [self showAction];
    [activityView startAnimating];
    [waitAlertView show];

// dismiss alertview with indicator view
    [waitAlertView dismissWithClickedButtonIndex:0 animated:YES];
    waitAlertView = nil;

    //call your view