ios tableView中在不同行中显示不同的颜色

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
if(indexPath.row %2 == 1){
[cell setBackgroundColor:[UIColor yellowColor]];
}
else{//indexPath.row % 2 == 0
[cell setBackgroundColor:[UIColor lightGrayColor]];
}
[cell setSelectedBackgroundView:[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"cell_bg.png"]]];
}