How to make an NSString path (file name) safe

Question

I\'m using very tricky fighting methods :) to make a string like Fi?le*/ Name safe for using as a file name like File_Name. I\'m sure there is a cocoa

Answer 1

This will remove all invalid characters anywhere in the filename based on Ismail's invalid character set (I have not verified how complete his set is).

- (NSString *)_sanitizeFileNameString:(NSString *)fileName {
    NSCharacterSet* illegalFileNameCharacters = [NSCharacterSet characterSetWithCharactersInString:@"/\\?%*|\"<>"];
    return [[fileName componentsSeparatedByCharactersInSet:illegalFileNameCharacters] componentsJoinedByString:@""];
}

Credit goes to Peter N Lewis for the idea to use componentsSeparatedByCharactersInSet:
NSString - Convert to pure alphabet only (i.e. remove accents+punctuation)