在 MonoTouch 中链接到 C++ 本地库 [英] Linking to a C++ native library in MonoTouch
问题描述
我正在阅读有关将本机库链接到 MonoTouch 的内容，特别是本文档:
I am reading up about linking native libraries into MonoTouch, specifically this documentation:
http://monotouch.net/Documentation/Linking_Native_Libraries
这里描述了到 C 库的链接.是否也可以从 MonoTouch 链接到 C++ 库?我对 MonoTouch 非常陌生，尤其是导入库，所以如果确实可能的话，我将不胜感激任何有关我在尝试导入 C++ 库时可能面临的问题的建议.将 C++ 库包装在一个 Objective-C 库中，然后使用 btouch 导入这是一个很好的方法吗?或者有更简单的方法吗?请记住，我对 C++(以及就此而言的 Objective-C)的知识可以最好地描述为危险的".;)
Here it describes linking to C libraries. Is it also possible to link to C++ libraries from MonoTouch? I am very new to MonoTouch and particularly to importing libraries, so I would appreciate any advice about problems I may face trying to import a C++ library, if this is indeed possible. Would wrapping the C++ library in an Objective-C library and then using btouch to import this be a good route to take? Or is there an easier approach? Bearing in mind that my knowledge of C++ (and Objective-C for that matter) can best be described as "dangerous". ;)
我问的原因是我需要使用 Sybase 的 C++ API 来访问他们的 Ultralite 数据库.我设法获得了一个示例应用程序，它使用 Objective-C 访问在 Xcode 中工作的 Ultralite C++ API.但现在我正在尝试将此示例移植到 MonoTouch.示例应用程序可以在这里找到:
The reason that I ask is that I am needing to make use of a C++ API from Sybase to access their Ultralite database. I have managed to get a sample application that accesses the Ultralite C++ API working in Xcode, with Objective-C. But now I am trying to port this sample to MonoTouch. The sample application can be found here:
https://github.com/BruceHill/Ultralite-Names-Sample-ObjC
Xcode 的 Sybase 文档提到了以下内容，参考在 Xcode 中使用 API:
The Sybase documentation for Xcode mentions the following, with reference to using the API in Xcode:
本教程使用 UltraLite C++ API.为了消除转换为 C 类型的需要，将源代码编译为 C++.将项目编译为 C++:
This tutorial uses the UltraLite C++ API. In order to eliminate the need to cast to C types, compile the source as C++. To compile the project as C++:
- 在在构建设置中搜索"框中，输入编译源为".
- 从值字段中的选项中选择 Objective-C++
这对在 MonoTouch 中使用此 API 有何影响?
What are the implications of this for working with this API in MonoTouch?
推荐答案
你当然可以使用 C++ api，但你需要将它封装在 C api 中，或者使用 ObjC+btouch api 才能与之对话这.调用 C api 使用 PInvoke，而 C++ 库使用符号处理.虽然理论上您可以对重整符号进行 pinvoke，但这不是一个好主意，因为重整是特定于编译器的.
You can certainly use a C++ api, but you will need to either wrap it in a C api, or a ObjC+btouch api to be able to talk to this. Invoking C api's uses PInvoke, and C++ libraries use symbol mangling. While theoretically you could pinvoke to the mangled symbol, this isn't a good idea as the mangling is compiler specific.
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