ios cordite 读取错误CoreData could not fulfill a fault for '0x15b4a870

解释在这里

http://stackoverflow.com/questions/14296892/nsobjectinaccessibleexception-reason-coredata-could-not-fulfill-a-fault

这里是中文的详细解释

http://blog.csdn.net/meegomeego/article/details/17654947

关于这个问题，我们涉及到2个函数：

/* returns the object for the specified ID if it is already registered, otherwise it creates a fault corresponding to that objectID.  It never returns nil, and never performs I/O.  The object specified by objectID is assumed to exist, and if that assumption is wrong the fault may throw an exception when used. */

- (NSManagedObject *)objectWithID:(NSManagedObjectID *)objectID;    

/* returns the object for the specified ID if it is already registered in the context, or faults the object into the context.  It might perform I/O if the data is uncached.  If the object cannot be fetched, or does not exist, or cannot be faulted, it returns nil.  Unlike -objectWithID: it never returns a fault.  */

- (NSManagedObject*)existingObjectWithID:(NSManagedObjectID*)objectID error:(NSError**)error NS_AVAILABLE(10_6, 3_0);

我们在来看看上面这2个函数的不同之处。

这了有几个词汇，第一个

ios cordite 读取错误CoreData could not fulfill a fault for '0x15b4a870