how to set UITableViewCell background image

UIView *cellBackView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
cellBackView.backgroundColor = [UIColor colorWithPatternImage: [UIImage imageNamed:@"background.png"]];
cell.backgroundView = cellBackView;

UIView *viewSelected = [[[UIView alloc] init] autorelease];
viewSelected.backgroundColor = [UIColor whiteColor];
cell.selectedBackgroundView = viewSelected;