如何使用Objective-C加载dylib或.a（静态库）文件？ [英] How to load dylib or .a (static library) file using objective-C?

问题描述

C＃代码：（windows）

C# code : (windows)

Assembly assembly = Assembly.LoadFrom(AssemblyPath);
System.Type[] objTypes = assembly.GetTypes();
Type libType = null;

我想在Mac上实现同样的功能，其中AssemblyPath是静态库（libTEST.a）或dylib的路径文件。在Objective-C（Mac）中可以吗？
我尝试使用NSBundle。但是我想要一些好的解决方案。

I want to achieve same for Mac where AssemblyPath is path of static library (libTEST.a) or dylib file. Is it possible in Objective-C (Mac)? I tried with NSBundle. But i want some good solution.

推荐答案

首先，这与Xcode 无关

First off, this has precisely nothing to do with Xcode.

现在，您无法动态加载静态库，因为静态库只是对象文件的集合，它们本身不是可执行文件。

Now, you can't load static libraries dynamically, because a static library is just a collection of object files, which are not, by themselves, executable.

为了加载动态库，请使用 dlopen（） API：

In order to load a dynamic library, use the dlopen() API:

void *handle = dlopen("/path/to/library.dylib", RTLD_LAZY);

要获取C函数指针：

int (*computeAnswer)(void) = dlsym(handle, "ComputeAnswer");
int answer = computeAnswer(); // 42

要获得不带 extern C 链接（混杂的名称）：

To get a C++ function pointer without extern "C" linkage (mangled name):

int (*mangledFunction)(void) = dlsym(handle, "i$mangledFunction_@v");

您甚至可以通过链接器的Objective-C命名约定来入侵自己编译器：

You can even hack yourself through the Objective-C naming convention of the linker compiler:

@class MyShinyClass;
Class cls = dlsym(handle, "OBJC_CLASS_$_MyShinyClass");

MyShinyClass *instance = [[cls alloc] init];

使用完库后，将其丢弃：

When you're done with the library, dispose of it:

dlclose(handle);

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