如果不需要，可以在不调用完成处理程序的情况下进行segue吗？(Is it okay to segue, without calling a completion handler, if not ne

如果不需要，可以在不调用完成处理程序的情况下进行segue吗？(Is it okay to segue, without calling a completion handler, if not needed?)

假设我有一个具有完成处理程序的函数，然后调用另一个函数，使用这样的完成处理程序：

func register(withCompletion complete: @escaping (() -> Void)) { self.sendRegisterRequest(withCompletion: { (error: Error?) -> () in if error != nil { self.performSegue(withIdentifier: "ErrorVCSegue", sender: nil) } else { complete() } }) }

如果发生错误，它将通过调用complete()消除。

我可以这样离开，不用调用complete()吗？我不需要从这个函数返回，因为我现在想要转到另一个View Controller。

谢谢。

Say I have a function that has a completion handler, then calls another function, with a completion handler like this:

In the event of an error, it will segue away with calling complete().

Am I ok to segue away like this, without calling complete()? I do not need to return from this function as I'm now wanting to go to another View Controller.

Thanks.

最满意答案

这是一个坏主意。无论如何都应该调用完成处理程序。呼叫者正在等待回复。它想知道什么时候完成。这就是拥有完成处理程序的重点。

在你的情况下（像许多其他情况一样），如果完成处理程序接受布尔参数（和/或错误参数）会更好。这样，完成处理程序提供了有关方法成功或失败的一些基本信息。

This is a bad idea. A completion handler should be called no matter what. The caller is waiting for a response. It wants to know when it is done. That's the whole point of having a completion handler.

In your case (like many other cases), it would be much better if the completion handler accepted a boolean parameter (and/or an error parameter). This way the completion handler provides some basic information about the success or failure of the method.

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