例えばこんなクラスがあるとする。 Customer.h @interface Customer : NSManagedObject {} @property (nonatomic, retain) NSString * address1;@property (nonatomic, retain) NSString * postcode;@property (nonatomic, retain) NSString * lastname;@property (nonatomic, retain) NSString * address2;@property (nonatomic, retain) NSString * firstname;@property (nonatomic, retain) NSDate * birthdate;@property (