相对路径在 Xcode C++ 中不起作用

2022-01-02 00:00:00 path macos c++ xcode

网上有很多帖子详细说明了相对路径在 Xcode 中是如何不起作用的.我确实有一个 Xcode 模板，我下载了它的相对路径可以在其中工作，但是我无法弄清楚为什么也无法在其他项目中复制它.

There are numerous post over the net that detail how relative paths don't work in Xcode. I do have an Xcode template that I downloaded where the relative paths DO work, however I have not been able to figure out why nor replicate it in other projects.

首先，我在 Xcode 3.1 中使用 C++.我没有使用 Objective-C，也没有使用任何 Cocoa/Carbon 框架，只是使用纯 C++.

Firstly, I am using C++ in Xcode 3.1. I am not using Objective-C, nor any Cocoa/Carbon frameworks, just pure C++.

这是适用于我的其他 Xcode 模板的代码:

Here is the code that works in my other Xcode template:

sound->LoadMusic( (std::string) "Resources/Audio/Pop.wav" );

这个相对路径在 Windows 中也适用于我.运行以下命令为我提供了应用程序完整路径的绝对路径:

This relative path works for me also in Windows. Running the following command gives me an absolute path to the application's full path:

std::cout << "Current directory is: " << getcwd( buffer, 1000) << "
";

/应用程序/myApp

/Applications/myApp

我们如何获得在 Xcode .app 包中工作的相对路径?

How can we get relative paths to work in an Xcode .app bundle?

推荐答案

我花了大约 5 个小时的谷歌和尝试不同的东西终于找到了答案！

Took me about 5 hours of Google and trying different things to FINALLY find the answer!

#ifdef __APPLE__
#include "CoreFoundation/CoreFoundation.h"
#endif

// ----------------------------------------------------------------------------
// This makes relative paths work in C++ in Xcode by changing directory to the Resources folder inside the .app bundle
#ifdef __APPLE__    
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    CFURLRef resourcesURL = CFBundleCopyResourcesDirectoryURL(mainBundle);
    char path[PATH_MAX];
    if (!CFURLGetFileSystemRepresentation(resourcesURL, TRUE, (UInt8 *)path, PATH_MAX))
    {
        // error!
    }
    CFRelease(resourcesURL);

    chdir(path);
    std::cout << "Current Path: " << path << std::endl;
#endif
// ----------------------------------------------------------------------------

我抛出了一些额外的包含守卫，因为这使得它只能编译 Apple(我开发跨平台)并使代码更好.

I've thrown some extra include guards because this makes it compile Apple only (I develop cross platform) and makes the code nicer.

我感谢其他 2 个人的回答，您的帮助最终让我走上了正确的道路，找到了这个答案，所以我已经投票给你们俩了.谢谢大家！！！！

I thank the other 2 guys for your answers, your help ultimately got me on the right track to find this answer so i've voted you both up. Thanks guys!!!!

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