Core Dataに複雑なやりとり　P195

CoreData.m

NSManagedObjectContext *moc self[self managedObjectContext];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *description = [[NSEntityDescription entityForName: @"user" inManagedObjectContext:managedObjectCOntext_] init];
[request setEntiry:descriotion];

NSError *error = nil;
NSArray *list = [moc exexuteFetchRequest:request];
MSManagesObject *requestObject = [list objectAtIndex:0];