ios cordite 讀取錯誤CoreData could not fulfill a fault for '0x15b4a870

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解釋在這裡

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

這裡是中文的詳細解釋

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

 

關於這個問題，我們涉及到2個函數：

/* 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);

 

 我們在來看看上面這2個函數的不同之處。

這了有幾個詞彙，第一個

 

ios cordite 讀取錯誤CoreData could not fulfill a fault for '0x15b4a870