Question

我有两个列表用户界面，两个列表中的单元格相同。对于这两个UI，将管理不同的Codable数组。即 FirstViewController包含 FirstDataModel ，而{{11}}包含 SecondDataModel 。

因此，在SecondViewController的{{1}}方法中，我调用了代码：

FirstViewController

数组：

cellForRow

我想为 FirstDataModel 和 SecondDataModel 设置通用功能。那么如何使用通用函数对其进行管理？

如何在func setPastCell(cell:WeekCell, data_dic:FirstDataModel) { cell.lblGoalA.text = predictScore1 cell.lblGoalB.text = predictScore2 }中传递struct FirstDataModel: Codable { var team1_name:String? var team2_name:String? var status:Int? var image:String? var score:Int? } struct SecondDataModel: Codable { var team1_name:String? var team2_name:String? var status:Int? var image:String? var count:Int? var balance:Int? }或FirstDataModel？

谢谢！

Answer 1

您可以从协议继承两个DataModel，并在设置中使用协议属性。

示例：

protocol ModelProtocol {
    var descriptionOne: String { get }
    var descriptionTwo: String { get }
}

struct FirstDataModel: ModelProtocol {}

func setPastCell(cell:WeekCell, data_dic: ModelProtocol) {
    cell.lblGoalA.text = descriptionOne
    cell.lblGoalB.text = descriptionTwo
}

Answer 2

创建具有共同属性的协议

 <style>
svg{
  border: 5px red solid;
  height:600px;
  width:600px;
}
  </style> 
  
  <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
         viewBox="0 0 600 600" >  

<rect x="295" y="430" width="10" height="100" style="stroke:none; fill: hsl(90, 100%, 47%);"/>
  <circle cx="300" cy="430" r="1"  stroke="black" stroke-width="2" fill="yellow">
   <animate
      attributeName="r"
      from="1"
      to="20"
	  begin="0s"
	  dur="2s"
	  repeatCount="indefinite"
	  fill="freeze"
      />
      
  </circle>
  
  <rect x="0" y="500" width="600" height="100" style="stroke:none; fill:hsl(120, 100%, 30%);"/>
</svg>

在您的结构中确认协议并添加其属性

protocol DataModel {
    var team1_name:String? { get }
    var team2_name:String? { get }
    var status:Int? { get }
    var image:String? { get }

}

当两个结构都确认使用DataModel协议时，可以在function参数中使用它。

struct FirstDataModel: DataModel, Codable {
    //Protocol properties
    var team1_name:String?
    var team2_name:String?
    var status:Int?
    var image:String?
    //additional properties
    var score:Int?
}
struct SecondDataModel: DataModel, Codable {
    //Protocol properties
    var team1_name:String?
    var team2_name:String?
    var status:Int?
    var image:String?
    //additional properties
    var count:Int?
    var balance:Int?
}

管理两种不同类型数据的单个变量

2 个答案: