CocoaPods在GitHub上的wiki在他们的常见问题解答中有正确的答案:

Go to Product > Edit Scheme Click on Build Add the Pods static library, and make sure it's at the top of the list Clean and build again If that doesn't work, verify that the source for the spec you are trying to include has been pulled from github. Do this by looking in <Project Dir>/Pods/<Name of spec you are trying to include>. If it is empty (it should not be), verify that the ~/.cocoapods/master/<spec>/<spec>.podspec has the correct github url in it. If still doesn't work, check your XCode build locations settings. Go to Preferences -> Locations -> Derived Data -> Advanced and set build location to "Relative to Workspace".

您是否打开工作区(由CocoaPods生成)而不是xcodeproj?

在我的例子中，这个链接中的第4个FAQ帮助了我: https://github.com/CocoaPods/CocoaPods/wiki/Creating-a-project-that-uses-CocoaPods

如果问题仍然存在，您可以尝试其他一些方法。

在我的案例中，pod安装在创建分发和发布方案后解决了这个问题。

我想念libPods。目标中的A，所以要做的第一件事是将它添加到链接的框架和库中。

接下来，Product -> Build for -> Profiling(或在添加libPods之前)。A，如果你完全错过了它)

最后在构建阶段检查你的Copy Pods资源脚本(如果它和你的第二个目标相同-有时它取决于Podfile和它的目标)。然后您就可以成功构建了。

如果Xcode在链接时报错，例如Library not found for -lPods，它不会检测到隐式依赖。

Go to Product > Edit Scheme Click on Build Add the Pods static library, and make sure it's at the top of the list Clean and build again If that doesn't work, verify that the source for the spec you are trying to include has been pulled from github. Do this by looking in /Pods/. If it is empty (it should not be), verify that the ~/.cocoapods/master//.podspec has the correct git hub url in it. If still doesn't work, check your XCode build locations settings. Go to Preferences -> Locations -> Derived Data -> Advanced and set build location to “Relative to Workspace”.

http://docs.cocoapods.org/guides/getting_started.html