我遇到了我在CoreData中设置的关系问题。它的一对多,一个客户可以有很多联系,这些联系人来自地址簿。保存一对多的关系CoreData
我的模型,它看起来像这样:
Customer <---->> Contact
Contact <-----> Customer
Contact.h
@class Customer;
@interface Contact : NSManagedObject
@property (nonatomic, retain) id addressBookId;
@property (nonatomic, retain) Customer *customer;
@end
Customer.h
@class Contact;
@interface Customer : NSManagedObject
@property (nonatomic, retain) NSString *name;
@property (nonatomic, retain) NSSet *contact;
@end
@interface Customer (CoreDataGeneratedAccessors)
- (void)addContactObject:(Contact *)value;
- (void)removeContactObject:(Contact *)value;
- (void)addContact:(NSSet *)values;
- (void)removeContact:(NSSet *)values;
@end
,并试图保存有:
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = [appDelegate managedObjectContext];
Customer *customer = (Customer *)[NSEntityDescription insertNewObjectForEntityForName:@"Customer" inManagedObjectContext:context];
[customer setValue:name forKey:@"name"];
for (id contact in contacts) {
ABRecordRef ref = (__bridge ABRecordRef)(contact);
Contact *contact = [NSEntityDescription insertNewObjectForEntityForName:@"Contact" inManagedObjectContext:context];
[contact setValue:(__bridge id)(ref) forKey:@"addressBookId"];
[customer addContactObject:contact];
}
NSError *error;
if ([context save:&error]) { // <----------- ERROR
// ...
}
我的代码,我有这样的错误:
-[__NSCFType encodeWithCoder:]: unrecognized selector sent to instance 0x9c840c0
*** -[NSKeyedArchiver dealloc]: warning: NSKeyedArchiver deallocated without having had -finishEncoding called on it.
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType encodeWithCoder:]: unrecognized selector sent to instance 0x9c840c0'
任何建议,将不胜感激。
在您的数据模型中如何配置'addressBookId'?您使用的是什么核心数据类型? Contact.m是否具有此属性的任何自定义设置代码? –
一种可能性是您设置了与您的数据模型上声明的值不同类型的'value'属性 – Yaman
@TomHarrington Contact.m没有任何自定义代码。数据模型中的'addressBookId'是'Transformable'。 –