ios - Swift:xib文件的继承

Question

我有两个几乎相同的 xib 文件。

VoucherTableViewCell.xib

BrandTableViewCell.xib

如您在 VoucherTableViewCell 中所见，我有两个 View “Código:AEB”和“Obtenla por”。现在，我为每个 VoucherTableViewCell 和 BrandTableViewCell 设置了两个类，并且都具有重复性:

VoucherTableViewCell.swift

protocol VoucherTableViewCellDelegate: class {
    func detailOptionTapped(id: String, description: String)
    func likeTapped(voucherId: String, reserved:Bool?, indexPath:NSIndexPath)
    func navigateToBrand()
}

class VoucherTableViewCell: UITableViewCell {

    var delegate:VoucherTableViewCellDelegate?
    var voucherId:String?
    var reserved:Bool?
    var indexPath:NSIndexPath?
    var brandId: String!

    @IBOutlet weak var voucherImageView: UIImageView!
    @IBOutlet weak var codeView: UIView!
    @IBOutlet weak var codeLabel: UILabel!
    @IBOutlet weak var hotDealView: UIView!
    @IBOutlet weak var hotDealLabel: UILabel!
    @IBOutlet weak var likeView: UIView!
    @IBOutlet weak var likeIconLabel: UILabel!
    @IBOutlet weak var likeNumberLabel: UILabel!
    @IBOutlet weak var brandLogoImageView: UIImageView!
    @IBOutlet weak var descriptionLabel: UILabel!
    @IBOutlet weak var detailView: UIView!
    @IBOutlet weak var detailIconLabel: UILabel!
    @IBOutlet weak var hotDealFlameIconLabel: UILabel!
    @IBOutlet weak var smartCoinIconLabel: UILabel!

    @IBAction func navigateToVoucherDetails(sender: UIButton) {
        self.delegate?.detailOptionTapped(voucherId!,description: descriptionLabel.text!)
    }

    @IBAction func likeTapped(sender:UIButton) {
        self.delegate?.likeTapped(voucherId!, reserved: reserved, indexPath: indexPath!)
    }

    @IBAction func navigateToBrand(sender: UIButton) {
        self.delegate?.navigateToBrand()
    }
}

BrandTableViewCell.swift

protocol BrandTableViewCellDelegate: class {
    func showBrandDetails(id: String, description: String)
    func likeTapped(brandId: String, reserved:Bool?, indexPath:NSIndexPath)
}

class BrandTableViewCell: UITableViewCell {
    var delegate:BrandTableViewCellDelegate?
    var brandId:String?
    var reserved:Bool?
    var indexPath:NSIndexPath?

@IBOutlet weak var brandImageView: UIImageView!
@IBOutlet weak var likeButtonView: UIView!
@IBOutlet weak var likeNumberLabel: UILabel!
@IBOutlet weak var likeIconLabel: UILabel!
@IBOutlet weak var brandLogoImageView: UIImageView!
@IBOutlet weak var descriptionLabel: UILabel!
@IBOutlet weak var detailButtonView: UIView!
@IBOutlet weak var detailIconLabel: UILabel!

@IBAction func showBrandDetails(sender: UIButton) {
    self.delegate?.showBrandDetails(brandId!,description: descriptionLabel.text!)
}

@IBAction func likeTapped(sender:UIButton) {
    self.delegate?.likeTapped(brandId!, reserved: reserved, indexPath: indexPath!)
}

如您所见，两个类中都重复了很多属性和方法，我想知道如何避免这个问题以尽可能多地重新利用我的代码，因为当我为两个凭证加载每个元素时和品牌代码是相似的。

我能做什么？我不知道，因为我是 iOS 开发的新手。

提前致谢。

Answer 1

我建议您实现一个通用协议(protocol)和包含通用功能和属性的基类。并使您的 tableviewcell 类继承自新创建的类。

// Common Protocol
protocol CommonTableViewCellDelegate: class
{
    func showDetailsTapped(id: String, description: String)
    func likeTapped(commonId: String, reserved:Bool?, indexPath:NSIndexPath)
}

// Common Base class
class CommonTableViewCell: UITableViewCell
{
    var cId:String?
    var reserved:Bool?
    var indexPath:NSIndexPath?
}

如果你需要在你的协议(protocol)中添加更多的方法，你可以像这样继承协议(protocol):

// Adding more functions to the existing protocol
protocol VoucherTableViewCellDelegate: CommonTableViewCellDelegate
{
   func navigateToBrand()
}

从新创建的基本单元类继承您的自定义 tableview 单元类:

class BrandTableViewCell: CommonTableViewCell
{
   ...
}


class VoucherTableViewCell: CommonTableViewCell
{
   ...
}