Objective-C唯一のiOSファイルパスライブラリ、YKFileの説明書 ref: http://qiita.com/GeneralD/items/b8bd37b1f698ee98fe58

file0.txt

pod "YKFile"

file10.m

YKFile *file = [YKFile documentsDirectory];
[file changeDirectory:@"Assets"];
[file makeDirectory];

file11.m

YKFile *file = [YKFile documentsDirectory];
[file makeDirectory:@"Assets"];

file12.m

YKFile *file = [YKFile documentsDirectory];
[file cd: @"abc/def/*/*"];

file19.m

[UIImage imageWithContentsOfFile:file.fullPath];

file7.m

YKFile *file = [YKFile documentsDirectory];
[file changeDirectory:@"Assets"];

file8.m

YKFile *file = [YKFile documentsDirectory];
[file changeDirectory:@"Assets/dir1/file1.text"];

NSMutableArray+YKFileArray.h

- (void)eachFile:(void (^)(YKFile *file, NSUInteger idx))pFunction;
- (void)sortFiles:(NSComparisonResult (^)(YKFile *file1, YKFile *file2))pFunction;
- (void)removeFilesFromList:(BOOL (^)(YKFile *file))pFunction;
- (YKFileArray *)cutFilesFromList:(BOOL (^)(YKFile *file))pFunction;

YKFile+NSDirectories.h

+ (instancetype)homeDirectory;
+ (instancetype)mainBundleDirectory;
+ (instancetype)cachesDirectory;
+ (instancetype)documentsDirectory;
+ (instancetype)temporaryDirectory;

YKFile.h

#pragma mark - Aliases
- (void)cd:(NSString *)path;
- (void)cd;
- (BOOL)mkdir:(NSString *)dirName;
- (BOOL)mkdirs:(NSString *)dirName;
- (BOOL)mkdir;
- (BOOL)mkdirs;
- (BOOL)rm:(NSString *)name;
- (BOOL)rm;
- (BOOL)cp:(YKFile *)destination;
- (BOOL)mv:(YKFile *)destination;

YKFile.m

#pragma mark - 'cd' Method

- (void)changeDirectory:(NSString *)path {
    NSArray *components = path.pathComponents;
    for (int i = 0; i < [components count]; i++) {
        NSString *component = components[i];
        if (i == 0 && [component isEqualToString:@"~"]) { // cd ~
            _fullPath = NSHomeDirectory();
        } else if ([component isEqualToString:@".."]) { // cd ..
            _fullPath = self.parentFile.fullPath;
        } else if ([component isEqualToString:@"."]) { // cd .
        } else if ([component isEqualToString:@"*"]) { // cd to first found file or directory
            YKFileArray *list = [self listFiles];
            for (YKFile *file in list) {
                if ([file.name isEqual:@".DS_Store"]) continue;
                if ([file.name isEqual:@"Thumbs.db"]) continue;
                _fullPath = file.fullPath;
                break;
            }
        } else { // cd component
            _fullPath = [_fullPath stringByAppendingPathComponent:component];
        }
    }
}