Ios 将复杂的JSON保存到Swift中的核心数据

我想将来自web服务的JSON结果保存到核心数据，下面是JSON解析的代码

if let jsonResult = try JSONSerialization.jsonObject(with: JSONData!, options: [.mutableContainers]) as? [String: AnyObject]

如果我打印jsonResult，下面是输出

["Code": 00, "Desc": success, "iinData": <__NSArrayM 0x1c02531a0>
{
  name = “AAA”;
  iin = 123456;
  isOn = 0;
},
{
  name = "Allahabad Bank";
  iin = 608112;
  isOn = 0;
},
)

---

使用

Decodable

• 首先，创建

  codingUserInfo-Key

  和

  JSONDecoder

  的扩展，以便能够传递托管对象上下文

  extension CodingUserInfoKey {
      static let context = CodingUserInfoKey(rawValue: "context")!
  }
  
  extension JSONDecoder {
      convenience init(context: NSManagedObjectContext) {
          self.init()
          self.userInfo[.context] = context
      }
  }
  

• 将一致性添加到两个类中的

  可解码

  class Name: NSManagedObject, Decodable {
  
  class ParamDownload: NSManagedObject, Decodable {
  

• 在类

  Name

  （不是扩展名）中添加

• 在类

  ParamDownload

  （不是扩展名）中添加

  init

  方法处理这些关系
  我建议尽可能多地声明核心数据属性非-可选。
  

  ---

  如果某个属性必须保持可选，则将

  解码

  替换为

  解码当前

  ，这对我来说也很好

  private func createParamDownloadEntityFrom(dictionary: [String: AnyObject]) -> NSManagedObject? {
      let context = CoreDataStack.sharedInstance.persistentContainer.viewContext
  
      if let paramEntity = NSEntityDescription.insertNewObject(forEntityName: “ParamDwonload”, into: context) as? ParamDownload {
          paramEntity.code = dictionary[“code”] as? String
          paramEntity.desc = dictionary[“desc”] as? String
          let innData = dictionary["iinData"] as! NSArray
  
  
          for i in 0..<(innData.count-1) {
  
              if let nameEntity = NSEntityDescription.insertNewObject(forEntityName: Name
                  , into: context) as? Name {
  
                  if let val = innData[i] as? [String: Any] {
                      nameEntity.bankName = val[“name"] as? String
                      nameEntity.iin = val[“iin"] as? String
                      if let isOn = Int16(val[“isOn"] as! String) {
                          nameEntity.isOnus = isOn
                      }
                      paramEntity.addToNames(nameEntity)
                  }
  
              }
          }
          return paramEntity
      }
  

  private func createParamDownloadEntityFrom（字典：[字符串：AnyObject]）->NSManagedObject？{
  让context=CoreDataStack.sharedInstance.persistentContainer.viewContext
  如果让paramEntity=NSEntityDescription.insertNewObject（forEntityName:“ParamdOnLoad”，into:context）作为？ParamDownload{
  parametity.code=字典[“code”]作为字符串
  parametity.desc=字典[“desc”]作为字符串
  让innData=dictionary[“iInnda”]作为！NSArray
  对于0中的i..我通过将JSON转换为数据并将该数据保存在CoreData中来保存JSON
  
  以下代码适用于我
  
  func saveSpotsLocation(model: SpotsModel, packageId: String, regionName: String) {
    let newUser = NSEntityDescription.insertNewObject(forEntityName: "SpotsDetail", into: context)
    do {
      let data = NSKeyedArchiver.archivedData(withRootObject: model.dictionaryRepresentation())
      newUser.setValue(data, forKey: "data")
      newUser.setValue(packageId, forKey: "packageId")
      newUser.setValue(regionName, forKey: "regionName")
      try context.save()
    } catch {
      print("failure")
    }
  }
  
  使用convert to data？Nskeyedarchieve？您是如何将解析后的JSON保存到CoreData的？您似乎只使用了
  JSONSerialization
  进行解码，但没有将数据转换为您创建的CoreData格式。谢谢或您的回复。我更新了将数据插入entity1的代码。您能否解释一下如何插入将数据导入Entity2。因为这是一对多关系数据。感谢您的回复。只需做一些更改，即可正常工作。
  private enum CodingKeys: String, CodingKey { case code = "Code", desc = "Desc", names = "iinData" }
  
  required convenience init(from decoder: Decoder) throws {
      guard let context = decoder.userInfo[.context] as? NSManagedObjectContext else { fatalError("NSManagedObjectContext is missing") }
      let entity = NSEntityDescription.entity(forEntityName: "ParamDownload", in: context)!
      self.init(entity: entity, insertInto: context)
      let values = try decoder.container(keyedBy: CodingKeys.self)
      code = try values.decode(String.self, forKey: .code)
      desc = try values.decode(String.self, forKey: .desc)
      names = try values.decode(Set<Name>.self, forKey: .names)
      names.forEach { $0.pd = self }
  }
  
  let decoder = JSONDecoder(context: CoreDataStack.sharedInstance.persistentContainer.viewContext)
  
  private func createParamDownloadEntityFrom(dictionary: [String: AnyObject]) -> NSManagedObject? {
      let context = CoreDataStack.sharedInstance.persistentContainer.viewContext
  
      if let paramEntity = NSEntityDescription.insertNewObject(forEntityName: “ParamDwonload”, into: context) as? ParamDownload {
          paramEntity.code = dictionary[“code”] as? String
          paramEntity.desc = dictionary[“desc”] as? String
          let innData = dictionary["iinData"] as! NSArray
  
  
          for i in 0..<(innData.count-1) {
  
              if let nameEntity = NSEntityDescription.insertNewObject(forEntityName: Name
                  , into: context) as? Name {
  
                  if let val = innData[i] as? [String: Any] {
                      nameEntity.bankName = val[“name"] as? String
                      nameEntity.iin = val[“iin"] as? String
                      if let isOn = Int16(val[“isOn"] as! String) {
                          nameEntity.isOnus = isOn
                      }
                      paramEntity.addToNames(nameEntity)
                  }
  
              }
          }
          return paramEntity
      }
  
  func saveSpotsLocation(model: SpotsModel, packageId: String, regionName: String) {
    let newUser = NSEntityDescription.insertNewObject(forEntityName: "SpotsDetail", into: context)
    do {
      let data = NSKeyedArchiver.archivedData(withRootObject: model.dictionaryRepresentation())
      newUser.setValue(data, forKey: "data")
      newUser.setValue(packageId, forKey: "packageId")
      newUser.setValue(regionName, forKey: "regionName")
      try context.save()
    } catch {
      print("failure")
    }
  }