PFObject subclass pointer assignment without prefetching the related PFObject

Question

I'm using PFObject subclassing, say:

@interface CarObject : PFObject <PFSubclassing>
@property (nonatomic, strong) BrandObject *brand;
@end

and

@interface  BrandObject : PFObject <PFSubclassing>
@end

How can I create CarObject with a reference to respective BrandObject without creating or fetching the BrandObject if I know BrandObject.objectId string?

Answer 1

您可以使用objectWithoutDataWithClassName:objectId:创建一个具有指定I的空占位符对象。