ios – 当RKObjectManager无法发布对象时,如何丢弃一个对象中的CoreData更改

在RKObjectManager中此对象的POST / PUT请求失败时,如何丢弃对NSManagedobject的实例所做的CoreData更改？

NSManagedobject *object = ...;
[object setValue:@"test" forKey: @"test"];
[[RKObjectManager sharedManager] postObject:object 
                                 parameters:nil 
                                    success:^(RKObjectRequestOperation *operation,RKMappingResult *mappingResult) { NSLog(@"success,nothing to do"); }
                                    failure:^(RKObjectRequestOperation *operation,NSError *error) { 
  // I want to discard changes made to object here 
}

更新：RestKit 0.20

解决方法

我对RKObjectManager一无所知,但为了放弃对NSManagedobject实例的更改,可以调用：

[object.managedobjectContext refreshObject：object mergeChanges：NO]

这将丢弃所有更改并将对象转为故障.

see here