将不同的对象添加到Coredata

Question

我的coredata模型中有不同的属性，如运费方式，因子模式等，如下图所示......

我有一个名为Shipping的实体，其属性为shipping method，factor，mode，transport。由于这些价值观不同，我感到困惑......

保存到coredata后，我的第一个对象的SHIP BY AIR(ELOC) shipping method值为40 Factor，AIR Mode等......

如果它是一个单一的价值，那么我本可以这样做......

do {
    let managedContext = persistentContainer.viewContext
    let newitem = NSEntityDescription.insertNewObject(forEntityName: "Values", into: managedContext)
    newitem.setValue("12",forKey: "custom")
    newitem.setValue("0.5",forKey: "ibaseCost")

     self.valueDetails.append(newitem as! Values)
     try managedContext.save()

 } catch {
 }

但在我目前的情况下，我如何存储到Coredata ......？

Answer 1

将数据添加到核心数据：

let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let ship = Shipping(context: context) // Link Task & Context
ship.shippingmethod = "yourvalue"
ship.factor = "yourvalue"
ship.mode = "yourvalue"
ship.transport = "yourvalue"

// Save the data to coredata
(UIApplication.shared.delegate as! AppDelegate).saveContext()

如果您的问题只是存储，这将解决它

希望这有帮助。

编辑添加多个数据的演示

var shippindData = [
        ["shippingMethod":"ELOC","Factor":40,"Mode":"AIR","Transport":"Y"],
        ["shippingMethod":"VLOC","Factor":40,"Mode":"AIR","Transport":"Y"],
        ["shippingMethod":"ELOC","Factor":35,"Mode":"MIXED MODE","Transport":"Y"]]

    for data in shippindData{

        let innerData = data as! [String:Any]
        let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
        let ship = Shipping(context: context) // Link Task & Context
        ship.shippingmethod = innerData["shippingMethod"]
        ship.factor = innerData["Factor"]
        ship.mode = innerData["Mode"]
        ship.transport = innerData["Transport"]

        // Save the data to coredata
        (UIApplication.shared.delegate as! AppDelegate).saveContext()
    }

您可以使用此逻辑创建这样的数据，并使用for-loop

添加它

Answer 2

希望此解决方案可以帮助您

为您的实体创建托管目标文件

<强>夫特：

public class YourEntityName: NSManagedObject {

@NSManaged public var custom: String

}

ObjC ：

@interface YourEntityName : NSManagedObject

@property (nullable, nonatomic, retain) NSString * custom; //follow the same for other columns

@end

@implementation YourEntityName

@dynamic custom; //follow the same for other columns

@end

只需在swift / Obj C文件中添加managedObject的属性即可。如果要保存，请使用代码段

    YourEntityName = NSEntityDescription.insertNewObject(forEntityName: ",into: "YourEntityName" appDelegateObject.managedObjectContext) as! YourEntityName

    YourEntityName.entity1 = "1"
    YourEntityName.entity2 = "2"
    YourEntityName.entity3 = "3"
    YourEntityName.entity4 = "4"

    self.yourManagedDelegateObject.saveContext()

确保使用coreData托管对象包装类