Xcode 8警告“实例方法几乎符合可选要求" [英] Xcode 8 Warning "Instance method nearly matches optional requirement"

问题描述

我在Xcode 8中将我的(macOS)项目转换为Swift 3，并通过在swift类中实现的几种委托方法收到以下警告:

I converted my (macOS) project to Swift 3 in Xcode 8 and I get the following warnings with several delegate methods I implement in swift classes:

Instance method 'someMethod' nearly matches optional requirement of protocol 'protocolName'

我通过诸如applicationDidFinishLaunching和applicationDidBecomeActive的几种NSApplicationDelegate方法获得了此信息:

I get this for several NSApplicationDelegate methods like applicationDidFinishLaunching and applicationDidBecomeActive:

但对于tableViewSelectionDidChange的实现也是如此:

But also for implementations of tableViewSelectionDidChange:

我使用代码完成功能来插入方法签名，还尝试从SDK标头中复制它们以排除错别字.警告只是不会消失，永远不会调用这些方法.

I used code completion to insert the method signatures and also tried copying them from the SDK-headers to rule out typos. The warnings just don't disappear and the methods are never called.

我在这里想念什么?

推荐答案

我们已就此问题与Apple开发人员技术支持(DTS)联系. 他们回答说，这是Xcode 8中的 bug .

We contacted Apple Developer Technical Support (DTS) with this issue. They replied that this is a bug in Xcode 8.

我们提交了一个错误报告，希望能尽快进行更新. (Apple Bug报告ID:28315920).

We submitted a bug report and hope for a quick update. (Apple Bug Report ID: 28315920).

如果遇到类似的问题，请 ="a href =" https://bugreport.apple.com/"rel =" nofollow noreferrer>提交错误报告 (指的是我们的)，因此Apple工程师认为它不是一个单独的案例.

If you experience a similar issue, please also file a bug report (referring to ours) so the Apple engineers see its not a single case.

针对Xcode≥8.1的更新

问题现在似乎已经解决，至少对于我们在项目中使用的委托方法而言.

The problem seems fixed now, at least for the delegate methods we are using in our project.

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