［已解决］swift中给UICollectionViewCell的下面添加一个label文字：Supplement或者footer

        let cell:UICollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier(StrIdConversationManageCollectionViewCell, forIndexPath: indexPath)
       
        //for debug
        cell.backgroundColor = UIColor.yellowColor()

        let cellImage:UIImage = memberList[indexPath.row].headerImageLarge
//        let imageView:UIImageView = UIImageView(image: cellImage)
        let imageView:UIImageView = UIImageView(image: cellImage)
//        imageView.center = cell.contentView.center
        imageView.center.x = cell.contentView.center.x
        cell.contentView.addSubview(imageView)
       
        if (indexPath.row == 0) {
            let nameLabelFrame = CGRectMake(0, cellImage.size.height + paddingY, cellImage.size.width, nameLabelHeight)
            let nameLabel:UILabel = UILabel(frame: nameLabelFrame)
            nameLabel.text = self.curPersonContactItem.name
            nameLabel.textAlignment = NSTextAlignment.Center
            nameLabel.font = UIFont.systemFontOfSize(12)
            cell.contentView.addSubview(nameLabel)
           
            //for debug
            nameLabel.backgroundColor = UIColor.greenColor()
        }
       

        return cell
    }