现在在代码中我也创建了NSManagedObject子类,并能够分别创建这个对象.所有我需要帮助的是我如何创建关系.我的代码是

Xcode生成Father.swift

class Father: NSManagedObject {
 
    @NSManaged var name: String
    @NSManaged var fathertochild: NSSet
 
}

Xcode生成Child.swift

class Child: NSManagedObject {
 
    @NSManaged var name: String
    @NSManaged var child_father: NSManagedObject
 
}

我的添加数据方法：

func addData(){
   var appDel: AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate
   var context: NSManagedObjectContext = appDel.managedObjectContext!
 
    var fatherEntity = NSEntityDescription.entityForName("Father",inManagedObjectContext: context)
    var newFather = Father(entity: fatherEntity,insertIntoManagedObjectContext: context)
    newFather.name = "Daddy"
 
 
    var childEntity = NSEntityDescription.entityForName("Child",inManagedObjectContext: context)
    var child1 = Child(entity: childEntity,insertIntoManagedObjectContext: context)
    child1.name = "child1"
    var child2 = Child(entity: childEntity,insertIntoManagedObjectContext: context)
    child2.name = "child2"
 
    //How to map these 2 childs to father? Need help in code here!
 
    context.save(nil)
 
}