xcode 什么是目标依赖？

What is a target dependency?

提问by Bob Chandelerison

I feel so noob asking this question, but what is a target dependency? I see it all the time in Xcode.

问这个问题我觉得很菜鸟，但什么是目标依赖？我一直在 Xcode 中看到它。

回答by Sherm Pendley

A dependency is another target that must be built before the current target can be. For example, if you have an app target and a framework target, the app target can have the framework target as a dependency, to ensure that the framework is built first. That is, the app target "depends" on the framework.

依赖项是必须在当前目标建立之前构建的另一个目标。例如，如果您有一个 app 目标和一个框架目标，则 app 目标可以将框架目标作为依赖项，以确保首先构建框架。也就是说，应用程序目标“取决于”框架。

回答by yoAlex5

Xcode Dependency^[About]is a dependency required to builda selected target.

Xcode Dependency^[About]是构建选定目标所需的依赖项。

Explicit dependency

显式依赖

Explicitdependency is a source codeaka Non-compiled dependency. Xcode builds all explicit dependenciesbefore the dependent target. Explicit dependencyoverrides implicit dependencywith the same product_name.

Explicit依赖是一个源代码又名Non-compiled dependency。Xcodeexplicit dependencies在依赖目标之前构建所有内容。使用相同的product_nameExplicit dependency覆盖。implicit dependency

Explicit Dependencyis specified in Build Phases -> Target Dependencies.

Explicit Dependency中指定Build Phases -> Target Dependencies。

There are multiple ways to specify in Xcode that our target depends on other target's products:

在 Xcode 中有多种方法可以指定我们的目标依赖于其他目标的产品：

• If the targets are in the same project
  No additional setup
• If the targets are in different projectsusing cross-project reference^[About]
  Specify search path

• 如果目标在同一个项目中
  无需额外设置
• 如果目标在不同的项目中使用cross-project reference^[About]
  指定搜索路径

Additional notes:

补充说明：

• Dynamic Framework
  • You should specify General -> Embedded Binaries. If not - on the real device you will get dyld: Library not loaded^[About]
  • If you start adding your dependency from General -> Embedded Binariesand select a product that is explicit dependency, Xcode automatically add it into Build Phases -> Target Dependencies
• Static binary
  • You can fill out only Build Phases -> Target Dependencies

• Dynamic Framework
  • 您应该指定General -> Embedded Binaries. 如果没有 - 在真实设备上，您将获得dyld: Library not loaded^[关于]
  • 如果您开始添加依赖项General -> Embedded Binaries并选择显式依赖项的产品，Xcode 会自动将其添加到Build Phases -> Target Dependencies
• Static binary
  • 您只能填写 Build Phases -> Target Dependencies

[Implicit dependency]

[隐式依赖]

[Vocabulary]

[词汇]