Does a grouped UITableView give its backgroundColor to its cells?

I want to have a background Image for a UITableView

Imagine you have just any grouped table initialized like this:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

// Override point for customization after application launch
ImageTableViewController *vc = [[ImageTableViewController alloc] initWithStyle:UITableViewStyleGroupe开发者_StackOverflowd];


 NSString *imagePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"BackgroundImage.jpg"];
 UIImage *image = [[[UIImage alloc] initWithContentsOfFile:imagePath] autorelease];
 vc.tableView.backgroundColor = [UIColor colorWithPatternImage:image];

 [window addSubview:vc.view];
    [window makeKeyAndVisible];

 return YES;
}

This results in the tableView having the backgrounImage, but also every cell having the lowermost part of the image.

I suppose this is the case, because UITableViewCell should have the same backgroundColor as UITableView. It would work good for colors, but with images the case is totally different.

Is there a way to tell UITableViewCell not to use this image?

override tableView:willDisplayCell:forRowAtIndexPath: and give the cell a transparent background