您的问题是[NSURL URLWithString：destinationPath]那。你需要像在解决方案中一样使用[NSURL fileURLWithPath：xxx]。发布这个只是为了澄清这是唯一的问题。

Your issue is [NSURL URLWithString:destinationPath] and only that. You need to use [NSURL fileURLWithPath:xxx] like you did in your solution. Posting this just to clarify that that is the only problem.