从Xcode生成的应用程序运行良好，不会直接从.app运行

Question

Working on a c++ mac application in Xcode. When I hit run everything is fine (debug and release mode). But when I go into finder into the Products/Release folder and double click on the .app directly, the app immediately closes with an error (application quit unexpectedly. click report to see more detailed information). When I click report, the line of code it errors on seems to indicate that it isn't finding my resource files, but it finds them fine when I build/run the same exact app from xcode. heres an example of how i use the resource files in the code:

std::ifstream file;
file.open("AppName.app/Contents/Resources/Saves/1.svd");
//do stuff
file.close();

anyone have any ideas why double clicking the .app that xcode just created would have different results than running it from xcode?

also not sure if this is part of the issue, but it seems strange that I have to reference the resource folder from outside the .app file (AppName.app/Contents/Resources/Saves/1.svd). I would expect that path to be relative to the executable in .app/Contents/MacOS like this (../Resources/Saves/1.svd) but that didnt work either.

Answer 1

I had similar problem and spending some time researching different options I ended up using Apple's objects. I needed to get resources folder:

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

Then actual snippet is:

#ifdef __APPLE__

char path[FILENAME_MAX];

CFBundleRef mainBundle = CFBundleGetMainBundle();
CFURLRef resourcesURL = CFBundleCopyResourcesDirectoryURL(mainBundle);

if (!CFURLGetFileSystemRepresentation(resourcesURL, TRUE, (UInt8 *)path, PATH_MAX)){
    //
    //log("CFURLGetFileSystemRepresentation returned false. Path:%s", path);
    exit(0);
}
CFRelease(resourcesURL);

chdir(path);

//log("Current path:%s", path);
#endif