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ios - 将 tableview 选择的数据存储到带有键值的数组中

问题描述

我是 swift 的新手，我已经创建了 tableview 选择所有行功能，所以选择取消选择对我来说很好，但现在我想要在 tableview 中选择的数据，所以我尝试用Encodable下面的方法创建结构模型

class QuotationListDataModel: Encodable{
    var id: String?
    var quantity: String?
    var margin: String?
    var created_date: String?
    var part_number: String?
    var total_price: String?
    var freight: String?
    var fk_customer_id: String?

    init(id: String?,quantity: String?,margin: String?,created_date: String?,part_number: String,total_price: String,freight: String,fk_customer_id: String) {
        self.id = id
        self.quantity = quantity
        self.margin = margin
        self.created_date = created_date
        self.part_number = part_number
        self.total_price = total_price
        self.freight = freight
        self.fk_customer_id = fk_customer_id
    }
}

我想像下面这样

[
  {
   margin: 20,
   quantity: 10
   part_number: 15
   total_price: 1500
   freight: 100
  },
  {
   margin: 20,
   quantity: 10
   part_number: 15
   total_price: 1500
   freight: 100
  }
]


@IBAction func btnSelectAllTapped(_ sender: UIButton) {
    if btnSelectAll.titleLabel?.text == "Select All"{
        self.btnSelectAll.setTitle("DeSelect All", for: .normal)
        self.btnSelectAll.backgroundColor = UIColor(red: 119/255, green: 119/255, blue: 119/255, alpha: 1)
        self.btnShare.isHidden = false
        self.arrSelectedIds = quotationSeelctedData.map({ (quotation: QuotationListDataModel) -> String in quotation.id! }) 
         //Here when user select all i want all data into array
        self.tblListView.reloadData()
    }else{
        self.isSelectAll = false
        btnSelectAll.setTitle("Select All", for: .normal)
        btnSelectAll.backgroundColor = UIColor(red: 0/255, green: 175/255, blue: 239/255, alpha: 1)
        self.btnShare.isHidden = true
        self.arrSelectedIds.removeAll()
        print(arrSelectedIds)
        self.tblListView.reloadData()
    }
}

所以我想要这样的选定数据，任何人都可以帮我解决它

标签： iosjsonswiftencoding

解决方案

要对行进行编码，您需要添加一个枚举，其中包含您希望成为编码数据一部分的属性到您的类

  enum CodingKeys: String, CodingKey {
      case margin, quantity, part_number, total_price, freight
  }

然后你可以像这样编码它

do {
    let data = try JSONEncoder().encode(arr)                                 
} catch {
    print(error)
}

需要考虑的一些问题，为什么所有属性都是 String 类型，为什么都是可选的？

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