在swift中保存coredata中的json数据

我正在尝试保存应用程序包中的json数据。但它不是保存所有数据，而是只保存一个数据

   func getDignosysListFromJson() {
       let coreData = CoreDataStack()
             let managedObjectContext = coreData.persistentContainer.viewContext
             let dignose = Dignose(context: managedObjectContext)
       let jsonPath = Bundle.main.path(forResource: "dignosys", ofType: "json")
       let jsonUrl = URL(fileURLWithPath: jsonPath!)
       do {
           let data = try Data(contentsOf: jsonUrl)
           let jsonResult = try JSONSerialization.jsonObject(with: data, options: .mutableContainers)
           if let newResult = jsonResult as? Array<Dictionary<String, Any>>{
               for i in newResult{
                   let newName = i["dx description"] as! String
                   print(newName)
                   
                   dignose.name = newName
                   dignose.date = "29 Dec 2020"
                  
                   
               }
               
               coreData.saveContext()
               

           }
       } catch {
           print("")
       }
   }

移动线路

let dignose = Dignose(context: managedObjectContext)

进入循环

for i in newResult {
    let dignose = Dignose(context: managedObjectContext)
    let newName = i["dx description"] as! String
    print(newName)
   
    dignose.name = newName
    dignose.date = "29 Dec 2020"
}

在每次迭代中获得一个新实例

---

该准则包含一些有问题的做法。我推荐这个

func getDignosysListFromJson() {
   let coreData = CoreDataStack()
   let managedObjectContext = coreData.persistentContainer.viewContext
        
   let jsonUrl = Bundle.main.url(forResource: "dignosys", withExtension: "json")!
   do {
       let data = try Data(contentsOf: jsonUrl)
       if let jsonResult = try JSONSerialization.jsonObject(with: data) as? [[String:Any]] {
           for anItem in jsonResult {
               let dignose = Dignose(context: managedObjectContext)
               let newName = anItem["dx description"] as! String
               print(newName)
               
               dignose.name = newName
               dignose.date = "29 Dec 2020"
           }
           coreData.saveContext()
       }
   } catch {
       print(error)
   }
}

移动线路

let dignose = Dignose(context: managedObjectContext)

进入循环

for i in newResult {
    let dignose = Dignose(context: managedObjectContext)
    let newName = i["dx description"] as! String
    print(newName)
   
    dignose.name = newName
    dignose.date = "29 Dec 2020"
}

在每次迭代中获得一个新实例

---

该准则包含一些有问题的做法。我推荐这个

func getDignosysListFromJson() {
   let coreData = CoreDataStack()
   let managedObjectContext = coreData.persistentContainer.viewContext
        
   let jsonUrl = Bundle.main.url(forResource: "dignosys", withExtension: "json")!
   do {
       let data = try Data(contentsOf: jsonUrl)
       if let jsonResult = try JSONSerialization.jsonObject(with: data) as? [[String:Any]] {
           for anItem in jsonResult {
               let dignose = Dignose(context: managedObjectContext)
               let newName = anItem["dx description"] as! String
               print(newName)
               
               dignose.name = newName
               dignose.date = "29 Dec 2020"
           }
           coreData.saveContext()
       }
   } catch {
       print(error)
   }
}