我正在尝试将自定义类保存为核心数据对象的属性。核心数据对象:@objc(Safer)classSafer:NSObject{@NSManagedvarperakimFiles:[prayer]?//ThislinegivesmeanerrorsayingthatitcannotsaveatypethatisnotObj.C@NSManagedvartitleEnglish:String?@NSManagedvartitleHebrew:String?@NSManagedvarparshaPerakim:[Int]?@NSManagedvarsaferCode:String?vartit