C ++ MAC OS X无法写入〜/Library/Application Support/< appname>

问题描述

如果我将文件保存在.app捆绑包中，则可以保存，但苹果建议在应用程序支持中保存文件在

If i save files inside the .app bundle, it saves OK, but apple recommends saving files inside the Application Supportunder

~/Library/Application Support/appname

或

~/Library/Application Support/bundleid

我都尝试过，但是我总是遇到异常.我正在获得应用程序支持的路径，即

I tried both, but I am always getting an exception. I am getting a path to the Application Support, which is

/Users/myname/Library/Application Support/com.company.appname/

或

/Users/myname/Library/Application Support/AppName/

在我的info.plist中正确指定了

com.company.appname，而AppName是product AppName.app，因此路径似乎正确.

com.company.appname is specified correctly inside my info.plist, and AppName is product AppName.app, so the paths seems correct.

{
    FilepathProcessor::pathForFile(fpath, "menustate", ".sav", 
                                   PATH_TO_DESTINATION_SAVE_LOAD_FOLDER);

    std::ofstream file;
    file.exceptions(std::ofstream::eofbit | std::ofstream::failbit | 
                    std::ofstream::badbit);
    INFO_ARG("prepare to save to '%s'", fpath.c_str());

    try {
        file.open(fpath.c_str(), std::ios::out | std::ios::binary | 
                  std::ios::trunc);
        ERROR_IF_ARG(!file.is_open(), "couldnt open file for saving at '%s'",
                     fpath.c_str(), return);

        //will pass this point

        //exception happens by first write
        WRITE_INT_TO_BINFILE(file, episode);

        //...

    } 
    catch (std::ofstream::failure e) {
        ERROR_IF_ARG(true, "exception %s", e.what(), return);
    }
    file.close();
}

输出:

INFO : prepare to save to '/Users/myname/Library/Application
       Support/com.comapny.appname/menustate.sav' [CALLED BY : saveToFile]

ERROR! 
    Text : exception basic_ios::clear

推荐答案

不是为您自动创建的目录不是.保存文件之前，首先需要检查目录是否存在，如果不存在，则需要创建目录.

The directory is not automatically created for you. Before saving the file, you first need to check if the directory exists, and if not, you need to create the directory.

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