问我在uitableview中使用广告，列表中的每4项都是广告

EN

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 2;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    if (section==0)
    {
            return 0;
    }
    else{
        return [self.articlesArray count];
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    NSInteger row = [indexPath row];
    if (3 == (row % 4)) {  // or 0 == if you  want the first cell to be an ad!
        static NSString *MyIdentifier = @"AdCell";
        AdViewCell  *cell = (AdViewCell *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
        if ((cell == nil) || (![cell isKindOfClass: AdViewCell.class] {
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"AdCell" owner:self options:nil];
            cell = [nib objectAtIndex:0];
            cell = [[AdViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                               reuseIdentifier:MyIdentifier] ;
        }
        GADBannerView *bannerView = [[GADBannerView alloc] initWithAdSize:kGADAdSizeMediumRectangle];

        bannerView =[[GADBannerView alloc] initWithFrame:CGRectMake(width,heigth,300,250)];

        bannerView.adUnitID =@"";
        bannerView.rootViewController =self;
        GADRequest *request = [GADRequest request];
        [bannerView loadRequest:request];

        [cell.contentView addSubview:bannerView];

        return cell;
    }
    else {
        static NSString *simpleTableIdentifier = @"ArticleCell";
        ArticleViewCell *cell = (ArticleViewCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier ];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
        if ((cell == nil) || (![cell isKindOfClass: ArticleViewCell.class]))
        {
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"ArticleCell" owner:self options:nil];
            cell = [nib objectAtIndex:1];
            cell = [[ArticleViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                              reuseIdentifier:simpleTableIdentifier] ;
        }

        NSInteger offset = indexPath.row / 4;
        NSInteger roww = indexPath.row - offset;
        NSDictionary * tempDictionary = [self.articlesArray objectAtIndex:roww];

        NSString *imageUrl = [[self.articlesArray objectAtIndex:indexPath.row]objectForKey:@"featured_image_thumbnail_tab_url"];
        imageUrl = [imageUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
        [cell.thumbnailImageView sd_setImageWithURL:[NSURL URLWithString:imageUrl ] placeholderImage:nil options:SDWebImageRetryFailed completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
        if (image) {
            // Set your image over here
        }else{
            //something went wrong
            NSLog(@"Error occured : %@", [error description]);
        }
   }];

    NSString * title=[tempDictionary valueForKeyPath:@"title.rendered"];

    cell.titleLabel.text = title;

    NSString * excerpt=[tempDictionary valueForKeyPath:@"excerpt.rendered"];
    NSString *excerpt_rend =[self convertHTML:excerpt];
    cell.excerptLabel.text = excerpt_rend;

    return cell;
    }
}

#pragma mark - Navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
   if ([[segue identifier] isEqualToString:@"showarticle"]){
   NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow]; 
   DGArticleViewController *articleViewController =    (DGArticleViewController *)segue.destinationViewController;
   articleViewController.articlesDetails = [self.articlesArray objectAtIndex:rowww];  //rowww = roww
   NSLog(@"data article %@",articleViewController.articlesDetails);
}
}