iOS / objective-c / core-data：如何从相关实体获取属性

Question

I have a detail view where I display attributes of an object from an entity in core data.

The entity has a one-to-one relationship with another entity that has other data. Because I don't understand relationships that well, it may not be set up correctly.

How can I display data from the other entity?

In .h file, I have:

 @property (nonatomic, strong) Persons *person;
    @property (nonatomic, strong) Addresses *address;
    @property (strong, nonatomic) NSManagedObjectContext *managedObjectContext;

In .m file in viewDidLoad I have:

 self.nameLabel.text = self.person.name;//displays fine
 self.addressLabel.text = self.address.address//does not display
NSLog(@"address:%@",self.address.address);//displays (null)

Thanks for any suggestions.

Answer 1

考虑到您已将人对象保存在视图控制器中，则只需按照person.address的关系获取其他实体。