//更新操作

- (void)updateThePersonData

{

    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];

    [fetchRequest setEntity:[NSEntityDescription entityForName:@"Entity" inManagedObjectContext:self.appDelegate.managedObjectContext]];

    //更新谁的条件在这里配置；

    NSString *theName = @"uptest";

    [fetchRequest setPredicate:[NSPredicate predicateWithFormat:@"name==%@", theName]];

    NSError* error = nil;

    NSArray* results = [self.appDelegate.managedObjectContext executeFetchRequest:fetchRequest error:&error];

    if (results.count > ) {

        NSLog(@"%@",results);

        Entity *entiy = [results objectAtIndex:];

        entiy.address = @"your address is update to JiNan";

    }

}