NSSearchPathForDirectoriesInDomain函数使用

    /*  在指定目录下搜索指定文件的路径     *     *  directory  要搜索的目录的名称     *  domainMask 搜索范围     *  expandTilde  是否扩展路径，YES->获取完整路径，一般为YES     *     *  return   返回值为数组，一般得到的是唯一的路径，所以直接取第一个就行了     *     *  注：以下附参数可选值列表     */    //NSArray<NSString *> *NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory directory, NSSearchPathDomainMask domainMask, BOOL expandTilde);    //在沙盒中获取Documents的完整路径    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];    //得到path下test文件的路径    NSString * filePath = [path stringByAppendingPathComponent:@"test"];    //判断test文件是否存在    NSFileManager * fm = [NSFileManager defaultManager];    if ([fm fileExistsAtPath:filePath]) {        NSLog(@"test文件存在");    }else{        NSLog(@"test文件不存在");    }        //参数列表    //NSSearchPathDirectory    typedef NS_ENUM(NSUInteger, NSSearchPathDirectory) {        NSApplicationDirectory = 1,             // supported applications (Applications)        NSDemoApplicationDirectory,             // unsupported applications, demonstration versions (Demos)        NSDeveloperApplicationDirectory,        // developer applications (Developer/Applications). DEPRECATED - there is no one single Developer directory.        NSAdminApplicationDirectory,            // system and network administration applications (Administration)        NSLibraryDirectory,                     // various documentation, support, and configuration files, resources (Library)        NSDeveloperDirectory,                   // developer resources (Developer) DEPRECATED - there is no one single Developer directory.        NSUserDirectory,                        // user home directories (Users)        NSDocumentationDirectory,               // documentation (Documentation)        NSDocumentDirectory,                    // documents (Documents)        NSCoreServiceDirectory,                 // location of CoreServices directory (System/Library/CoreServices)        NSAutosavedInformationDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 11,   // location of autosaved documents (Documents/Autosaved)        NSDesktopDirectory = 12,                // location of user's desktop        NSCachesDirectory = 13,                 // location of discardable cache files (Library/Caches)        NSApplicationSupportDirectory = 14,     // location of application support files (plug-ins, etc) (Library/Application Support)        NSDownloadsDirectory NS_ENUM_AVAILABLE(10_5, 2_0) = 15,              // location of the user's "Downloads" directory        NSInputMethodsDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 16,           // input methods (Library/Input Methods)        NSMoviesDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 17,                 // location of user's Movies directory (~/Movies)        NSMusicDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 18,                  // location of user's Music directory (~/Music)        NSPicturesDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 19,               // location of user's Pictures directory (~/Pictures)        NSPrinterDescriptionDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 20,     // location of system's PPDs directory (Library/Printers/PPDs)        NSSharedPublicDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 21,           // location of user's Public sharing directory (~/Public)        NSPreferencePanesDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 22,        // location of the PreferencePanes directory for use with System Preferences (Library/PreferencePanes)        NSApplicationScriptsDirectory NS_ENUM_AVAILABLE(10_8, NA) = 23,      // location of the user scripts folder for the calling application (~/Library/Application Scripts/code-signing-id)        NSItemReplacementDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 99,    // For use with NSFileManager's URLForDirectory:inDomain:appropriateForURL:create:error:        NSAllApplicationsDirectory = 100,       // all directories where applications can occur        NSAllLibrariesDirectory = 101,          // all directories where resources can occur        NSTrashDirectory NS_ENUM_AVAILABLE(10_8, NA) = 102                   // location of Trash directory            };        //NSSearchPathDomainMask    typedef NS_OPTIONS(NSUInteger, NSSearchPathDomainMask) {        NSUserDomainMask = 1,       // user's home directory --- place to install user's personal items (~)        NSLocalDomainMask = 2,      // local to the current machine --- place to install items available to everyone on this machine (/Library)        NSNetworkDomainMask = 4,    // publically available location in the local area network --- place to install items available on the network (/Network)        NSSystemDomainMask = 8,     // provided by Apple, unmodifiable (/System)        NSAllDomainsMask = 0x0ffff  // all domains: all of the above and future items    };