在这里尝试了好几个月之后……疯狂的定义…在一个新的Mac用户下启动Xcode为我解决了这个问题。

我删除了~/Library/Developer/*并重新安装了Xcode-所以不知道还要格式化什么才能使它工作。

发生这种情况的原因有很多。刚刚度过了一个有趣的周末，发现了另一个导致这个问题的问题(代码签名的顺序)，我想创建一个总结答案，将所有可能的解决方案放在一起:

Add Embedded Content Contains Swift Code to project. You need to set this flag if your app contains Swift code. Clean project. In addition to a Project > Clean you can also delete the DerivedData and Build directories. Look under the Preferences for the location of DerivedData. Build should be in your project folder. Ensure Runpath Search Paths contains @executable_path/Frameworks. Ensure that your certificate contains your Apple Team ID in the OU (Organization Unit) field Apple will add this for you, just revoke your existing distribution certificate and create a new one, download, install on KeyChain, regenerate all provisioning profiles, download those and rebuild. Xcode restart. If everything is basically good, but Xcode hasn't gotten there yet.

这很简单。如果你正在进行自己的命令行构建，你可能会创建自己的.ipa文件来上传。在这种情况下，您需要确保以下内容:

Make sure the version of the Swift files in SwiftSupport/iphoneos is the same as the version in Contents/YourApp.app/Frameworks Because Swift is not yet binary compatible between version, you must ensure these versions are the one that you built your app with. You can find these libraries under /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphoneos. Sign the libraries and frameworks first. You need to codesign the libraries and framework files (under Frameworks in the .app folder) first and then sign the entire .app tree. The .app tree must be signed with an entitlements.plist but not the frameworks.

希望当Swift 3.0问世时，我们不再需要将Swift捆绑到我们的应用程序中，这个问题就会消失。

如果你通过嵌入式二进制文件添加这三个框架，它们也会被添加到链接框架和库中。删除链接框架和库中的三个条目将解决问题。

像重新启动Xcode和重启Mac这样的神奇方法对我不起作用。

当我用Swift语言添加一个新的Today扩展目标到一个旧项目时，这就出现了。 通过将项目更新为推荐设置可以轻松修复。Xcode 6.0.1中

重启Xcode就解决了这个问题。

我的环境:Cocos2d 2.0, Box2d, Objective C

除了做上面的其他答案，我最后去了General选项卡，并使WatchKit可选。