相对路径不工作在Xcode C ++ [英] Relative Paths Not Working in Xcode C++

问题描述

在网上有很多post，详细说明相对路径在Xcode中不工作。我有一个Xcode模板，我下载的相对路径工作，但我没有能够弄清楚为什么，也不复制在其他项目。

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 ++。我不使用Objective-C，也不使用任何Cocoa / Carbon框架，只是纯C ++。

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

这是在我的其他Xcode模板中的代码：

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

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

这个相对路径也适用于Windows。运行以下命令可以得到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) << "\n";

/ Applications / myApp

/Applications/myApp

我们得到了在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

告诉我5个小时的Google，最终找到答案！

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
// ----------------------------------------------------------------------------

我抛出一些额外的包含守卫，因为这使它只编译苹果（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个人的答案，你的帮助最终让我在正确的轨道找到这个答案，所以我已经投了你两个。谢谢你们!!!!

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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