как инициализировать NSMutableOrderedSet

Question

Может ли кто-нибудь показать мне, как инициализировать NSMutableOrderedSet?

Я попробовал следующее

NSMutableOrderedSet *answerSet = [NSMutableOrderedSet orderedSet]; 

но повесить там бревно просто (lldb)

вставит объект ответа

#import "Answer.h" 
#import "Survey.h" 


@implementation Answer 

@dynamic count; 
@dynamic text; 
@dynamic survey; 

@end 

EDIT 1:

#import <Foundation/Foundation.h> 
    #import <CoreData/CoreData.h> 

    @interface Survey : NSManagedObject 

    @property (nonatomic, retain) NSDate * dateCreated; 
    @property (nonatomic, retain) NSString * id; 
    @property (nonatomic, retain) NSString * note; 
    @property (nonatomic, retain) NSString * question; 
    @property (nonatomic, retain) NSMutableOrderedSet *answers; 
    @end 

    @interface Survey (CoreDataGeneratedAccessors) 

    - (void)addAnswersObject:(NSManagedObject *)value; 
    - (void)removeAnswersObject:(NSManagedObject *)value; 
    - (void)addAnswers:(NSMutableOrderedSet *)values; 
    - (void)removeAnswers:(NSMutableOrderedSet *)values; 

    @end 


    #import <Foundation/Foundation.h> 
    #import <CoreData/CoreData.h> 

    @class Survey; 

    @interface Answer : NSManagedObject 

    @property (nonatomic, retain) NSNumber * count; 
    @property (nonatomic, retain) NSString * text; 
    @property (nonatomic, retain) Survey *survey; 

    @end 


     NSMutableOrderedSet *answerSet = [[NSMutableOrderedSet alloc] initWithCapacity:4]; 

     Answer *ans1 = [NSEntityDescription insertNewObjectForEntityForName:@"Answer"inManagedObjectContext:managedObjectContext]; 
     ans1.text = trimedAns1; 
     ans1.count = 0; 
     ans1.survey = survey; 

     Answer *ans2 = [NSEntityDescription insertNewObjectForEntityForName:@"Answer"inManagedObjectContext:self.managedObjectContext]; 
     ans2.text = trimedAns2; 
     ans2.count = 0; 
     ans2.survey = survey; 

     [answerSet addObject:ans1]; 
     [answerSet addObject:ans2]; 

     [survey setAnswers:answerSet]; 

     NSError *error = nil; 

     if (![managedObjectContext save:&error]) { 

      NSLog(@"Can't Save! %@ %@", error, [error userInfo]); 

     } else { 

      NSLog(@"Saved question : %@", self.question.text); 

     } 

и теперь я получил исключение ниже при сохранении основных данных:

2013-06-27 22:58:33.955 Simple Survey[718:11903] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unacceptable type of value for to-many relationship: property = "answers"; desired type = NSSet; given type = __NSOrderedSetM; value = {(
     <Answer: 0x8168070> (entity: Answer; id: 0x81c8880 <x-coredata:///Answer/t0F1038D5-DD97-4066-AB7D-E92386A9010B3> ; data: { 
     count = nil; 
     survey = "0x81be560 <x-coredata:///Survey/t0F1038D5-DD97-4066-AB7D-E92386A9010B2>"; 
     text = 6; 
    }), 
     <Answer: 0x74ec7f0> (entity: Answer; id: 0x74eed40 <x-coredata:///Answer/t0F1038D5-DD97-4066-AB7D-E92386A9010B4> ; data: { 
     count = nil; 
     survey = "0x81be560 <x-coredata:///Survey/t0F1038D5-DD97-4066-AB7D-E92386A9010B2>"; 
     text = 7; 
    }) 
    )}.' 

Answer 1

Вы можете сделать так:

NSMutableOrderedSet *answerSet = [[NSMutableOrderedSet alloc] initWithCapacity:100]; 

И чтение this будет полезно для вас.