一对多关系核心数据获取数据

关于这个话题有很多问题,但我无法让它发挥作用。

在瓦迪亚的回答中,他通过两个重复的循环得到值:

1. swift 3 - core data relationship - fetch data
2. https://stackoverflow.com/a/43846785/8887336

它对我的代码不起作用,我也不知道为什么。

这是我的代码:

import Foundation
import CoreData

struct HobbiesCollection {
  let typ: String
  let location: String
}


class LoadData{
  class func load(context: NSManagedObjectContext) {
    let persons = ["Owen", "Greg"]
    let futbal = HobbiesCollection(typ: "futbal", location: "stadium")
    let swimming = HobbiesCollection(typ: "swimming", location: "pool")
    let collection = [persons[0]: swimming, persons[1]: futbal]

    for x in collection {
      let person = Person(context: context)
      let hobbiesCD = Hobbies(context: context)
      person.name = x.key
      hobbiesCD.typ = x.value.typ
      hobbiesCD.location = x.value.location

      person.addToToHobbies(hobbiesCD)

      do {
        try context.save()
      } catch let error {
        print(error.localizedDescription)
      }
    }

    let fetch: NSFetchRequest<Person> = Person.fetchRequest()
    var result = [Person]()
    do {
      result = try context.fetch(fetch)
    } catch let error {
    print(error.localizedDescription)
    }
    for y in result {
      print("Persons:", y.name!)
      for x in y.toHobbies! {
        let location = x.location Error: "Value of type 'Any' has no member 'location'"
      }
    }
  }
}

我得到错误:

“Any”类型的值没有成员“location”

我的两个核心数据类:

extension Person {

    @nonobjc public class func fetchRequest() -> NSFetchRequest<Person> {
        return NSFetchRequest<Person>(entityName: "Person")
    }

    @NSManaged public var name: String?
    @NSManaged public var toHobbies: NSSet?

}

// MARK: Generated accessors for toHobbies
extension Person {

    @objc(addToHobbiesObject:)
    @NSManaged public func addToToHobbies(_ value: Hobbies)

    @objc(removeToHobbiesObject:)
    @NSManaged public func removeFromToHobbies(_ value: Hobbies)

    @objc(addToHobbies:)
    @NSManaged public func addToToHobbies(_ values: NSSet)

    @objc(removeToHobbies:)
    @NSManaged public func removeFromToHobbies(_ values: NSSet)

}
extension Hobbies {

    @nonobjc public class func fetchRequest() -> NSFetchRequest<Hobbies> {
        return NSFetchRequest<Hobbies>(entityName: "Hobbies")
    }

    @NSManaged public var typ: String?
    @NSManaged public var location: String?
    @NSManaged public var toPerson: Person?

}

还有一个关于谓词的问题。 如果执行如下谓词获取:

取来谓词=NSPredicate(格式:“name=%@”,person1)

如果在我的示例中我有多个爱好,那么是否可以使用location=stadium(例如,使用第二个谓词参数)获取所有爱好,以代替使用for循环查找location=stadium of person1的这些爱好?