Removes accents, spaces, tabs and punctionation from a given string

Objective-C String Sanitation

+(NSString*)sanitizeString:(NSString *)originalString
{
   
    // example string
    // NSString *unfilteredString = @"!@#$%^&*()_+|abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
   
    // define the characters you want to allow
    NSString *allowedChars =@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
    // makes an inverted set based on your setting
    NSCharacterSet *notAllowedChars = [[NSCharacterSet characterSetWithCharactersInString:allowedChars] invertedSet];
   
    // convert all to lowercase respecting accents
    NSString *sanitizedString = [originalString lowercaseStringWithLocale:nil];
    // trim the string
    [sanitizedString stringByTrimmingCharactersInSet:[NSCharacterSet punctuationCharacterSet]];
    // remove accents
    sanitizedString = [[NSString alloc] initWithData: [sanitizedString dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES] encoding:NSASCIIStringEncoding];
    // remove forbidden characters
    sanitizedString = [[sanitizedString componentsSeparatedByCharactersInSet:notAllowedChars] componentsJoinedByString:@""];
    [sanitizedString stringByReplacingOccurrencesOfString:@"[ ]+"
                                        withString:@" "
                                           options:NSRegularExpressionSearch
                                             range:NSMakeRange(0, sanitizedString.length)];
   
    // returns result
    return sanitizedString;
   
}