每个框架内的 module.modulemap 文件中的 export * 是什么?

问题描述

我创建了一个名为Communication 的框架，在框架容器内有一个module.modulemap 文件.

module.modulemap

框架模块通讯{伞头Communication.h"出口 *模块 * { 导出 * }}

我可以理解该模块需要伞形标头才能将其公开给包含应用程序/目标.

但是另外两行代码是什么意思.

 导出 *模块 * { 导出 * }

如果有人知道这行输出的是什么?

解决方案

Objective-C Module Map(.modulemap) for Objective-C and Swift

Objective-C 语言为 Objective-C 和 Swift 语言公开 API 思想 .modulemap

您应该手动创建和设置它

创建框架时会自动设置

即使你创建了 Swift 框架 Xcode 也会自动创建 modulemap

[在同一个应用程序中混合使用 Objective-C 和 Swift]

I have created one framework named Communication, inside framework container there is one module.modulemap file.

module.modulemap

framework module Communication {
  umbrella header "Communication.h"

  export *
  module * { export * }
}

I can understand that module required umbrella header to expose it to containing application/target.

But what is meaning of other two lines of code.

  export *
  module * { export * }

If any have idea what this lines exporting ?

解决方案

Objective-C Module Map(.modulemap) for Objective-C and Swift

Objective-C language exposes API thought .modulemap for Objective-C and Swift languages

[ObjC Module]

[Custom .modulemap]

It is about LLVM Modules and Module Map Language. Modulemap exposes C header files for external binaries. It is a bridge between module and headers. Modulemap helps to convert #include, #import -> @import because it has a mapping between module name and headers inside. Also modulemap helps to create standalone additional modules and submodules. Modulemap can contains a lot of modules(only one has to have the same name as product name) and a lot of submodules

//Objective-C exposes API thought .modulemap for Objective-C and Swift

.h.m uses .h.m = Objective-C consumer, Objective-C producer = .modulemap
.swift uses .h.m = Swift consumer, Objective-C producer = .modulemap

Framework which includes .modulemap is called Modular Framework. Path:

module_name.framework/Modules/module_name.modulemap

Setup

• When you create a library you should create and setup it manually
• When you create a framework it is setup automatically

Even if you create Swift framework Xcode automatically creates modulemap

[Mixing Objective-C and Swift in the same Application]

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