// Заменить adView на заглушку, чтобы UI не работал, когда приложение в фоне

- (void)onWillResignActive {
    if (self.adView.superview) {
        UIGraphicsBeginImageContext(self.adView.bounds.size);
        [self.adView.layer renderInContext:UIGraphicsGetCurrentContext()];
        UIImage *adViewScreenShot = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        adViewThumbView = [[UIImageView alloc] initWithImage:adViewScreenShot];
        adViewThumbView.backgroundColor = [UIColor clearColor];
        adViewThumbView.frame = self.adView.frame;

        NSInteger adIndex = [self.adView.superview.subviews indexOfObject:self.adView];
        [self.adView.superview insertSubview:adViewThumbView atIndex:adIndex];
        [self.adView removeFromSuperview];
    }
}

// Вернуть все обрано
- (void)onDidBecomeActive {
    if (self.adView && adViewThumbView) {
        NSInteger adIndex = [adViewThumbView.superview.subviews indexOfObject:adViewThumbView];
        [adViewThumbView.superview insertSubview:self.adView atIndex:adIndex];
        [adViewThumbView removeFromSuperview];
        adViewThumbView = nil;
    }
}