ios - 添加 Realm Cocoapod 时重复符号

Question

我是第一次尝试在实际项目中使用 Realm，我已经通过 Cocoapods 成功添加了它。我正在使用 Xcode 6.4，但在同一台机器上安装了 Xcode 7.1 beta(用于其他项目)。

当尝试构建项目或运行单元测试(在模拟器上)时，我收到一个链接器错误，指出数十对文件是重复的。看起来一个提到了 Bitcode 而另一个没有。

我正在使用 Xcode 6.4 – 为什么它甚至知道 Bitcode？这是错误的一小部分示例:

duplicate symbol _llvm.cmdline in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(row-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.embedded.module in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(row-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.cmdline in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(spec-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.embedded.module in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(spec-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.cmdline in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(table-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.embedded.module in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(table-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.cmdline in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(table_view-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.embedded.module in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(table_view-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.cmdline in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(unicode-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.embedded.module in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(unicode-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.cmdline in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(utilities-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.embedded.module in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(utilities-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.cmdline in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(version-iPhoneSimulator-bitcode.o)
duplicate symbol _llvm.embedded.module in:
    /Users/me/Source/our-project-ios/Pods/Realm/core/librealm-ios.a(bptree-iPhoneSimulator-bitcode.o)

我见过其他人谈论过类似的问题，但不是关于 Xcode 6.4，也不是简单地运行应用程序，而不是提交到商店。

我还应该指出，将 Realm 添加为静态框架(来自 0.95.3 的 xcode-6 文件夹工作得很好，所以它与我似乎是从 Cocoapods 获得的。

我可以在这里做什么？如果可能的话，我真的宁愿从 Cocoapods 获取它。

Answer 1

根据您使用的 Xcode 版本，需要不同版本的 Realm 核心库，因此在运行 时使用 xcode-select 激活相同版本很重要pod install 用于构建项目。由于下载了 Xcode 7 版本的库，您可能已经激活了该版本的 Xcode。运行 sudo xcode-select -s/Applications/Xcode.app/Contents/Developer(假设这是您安装 Xcode 6 的位置；根据需要进行调整)，删除 Pods 目录，然后重新运行 pod install。

您可以使用 xcrun swiftc -v 检查激活的 Xcode 版本。