在更新到Xcode 10.2 (Swift 5)后遇到了这个问题。找到下面的苹果链接，显示了两个选项: https://support.apple.com/kb/DL1998?locale=en_US

对我来说，我把MacOS更新到10.14.4 (OS中包含Swift库)。否则，“下载Swift 5运行时支持命令行工具”的旧操作系统。

我也有同样的问题。我的解决方案是将每个pod声明移动到目标子句中。

来自:

pod 'SomePod1'
pod 'SomePod2'
pod 'SomePod3'
target 'MyAwesomeApp', :exclusive => true do

end

To:

target 'MyAwesomeApp', :exclusive => true do
    pod 'SomePod1'
    pod 'SomePod2'
    pod 'SomePod3'
end

我的猜测是，如果pod声明放在目标声明之外，CocoaPods(0.39.0)可能会使用错误的xcconfig。

Pods.debug.xcconfig (X

Pods-MyAwesomeApp.debug.xcconfig (O

我使用Xcode 6.1.1版本的Mavericks，在带有iOS 8.1.1的iPhone5上测试，也遇到了同样的问题。我尝试了所有可能的解决方案，包括新的证书和配置配置文件，但都没有帮助。我在项目级和目标级上对包含Swift代码的嵌入式内容和跑道搜索路径进行了更改。

我现在已经安装了优胜美地，没有任何进一步的改变，它开始工作了。

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

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。

我也遇到过这个问题，只是没有定位libswiftXCTest.dylib。

解决方案是在Build Phases/Link Binary with Library中将XCTest.framework添加到Tests目标中。即使当我试图构建主目标时，我也会得到这个错误。