使用 XCode 4 进行单元测试的链接错误？
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Linking error for unit testing with XCode 4?
提问by shadowmatter
I want to write some logic unit tests for classes in my XCode application. In Xcode 4, I clicked on the project name in the Project Navigator, and from the bottom clicked Add Target. I chose "Cocoa Touch Unit Testing Bundle" under Other, give the new target a "product name" of "tests", and finish.
我想为我的 XCode 应用程序中的类编写一些逻辑单元测试。在 Xcode 4 中，我在 Project Navigator 中单击了项目名称，然后从底部单击了 Add Target。我在其他下选择了“Cocoa Touch Unit Testing Bundle”，给新目标一个“产品名称”“测试”，然后完成。
Because the class I want to test is compiled as part of my existing application target, for my new "tests" target I immediately go to the Build Phases tab and add my existing application target as the only target dependency.
因为我要测试的类是作为我现有应用程序目标的一部分编译的，所以对于我的新“测试”目标，我立即转到“构建阶段”选项卡并将我现有的应用程序目标添加为唯一的目标依赖项。
I then go to the created tests.m file, import the class I want to test (below it's ReleasePlanManager, and call one of its methods. But the linker fails with an error like:
然后我转到创建的 tests.m 文件，导入我想测试的类（在它下面ReleasePlanManager，并调用它的方法之一。但链接器失败并出现如下错误：
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_ReleasePlanManager", referenced from:
objc-class-ref in tests.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
So the class cannot be found, even though (from my understanding) adding the application target (which it is a part of) should be sufficient?
因此无法找到该类，即使（根据我的理解）添加应用程序目标（它是其中的一部分）应该就足够了？
Any help would be greatly appreciated. Thanks!
任何帮助将不胜感激。谢谢！
回答by Jon Reid
Your test bundle needs extra settings:
您的测试包需要额外的设置：
- Set Bundle Loaderto
$(BUILT_PRODUCTS_DIR)/AppName.app/AppName(replacing AppName in both places with your app's name) - Set Test Hostto
$(BUNDLE_LOADER)
- 将Bundle Loader设置为
$(BUILT_PRODUCTS_DIR)/AppName.app/AppName（用您的应用程序名称替换两个地方的 AppName） - 将测试主机设置为
$(BUNDLE_LOADER)
(If you create a project from scratch and enable unit tests, these are set up for you. But if you add a unit test bundle to an existing project, they're not.)
（如果您从头开始创建一个项目并启用单元测试，这些是为您设置的。但是如果您将单元测试包添加到现有项目中，则它们不是。）
