Backup diff of NSString (No. 1)

• Backup list
• View the diff current.
• View the diff for visual.
• View the source.
• View the backup.
• Go to NSString.
  • 1 (2014-10-07 (Tue) 02:48:39)
  • 2 (2014-10-14 (Tue) 01:39:35)

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.

- Objective-c iPhone percent encode a string?
--  http://stackoverflow.com/questions/3423545/objective-c-iphone-percent-encode-a-string
The iOS 7 SDK now has a better alternative tostringByAddingPercentEscapesUsingEncoding that does let you specify that you want all characters escaped except certain allowed ones. It works well if you are building up the URL in parts:
 NSString * unescapedQuery = [[NSString alloc] initWithFormat:@"?myparam=%d", numericParamValue];
 NSString * escapedQuery = [unescapedQuery stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
 NSString * urlString = [[NSString alloc] initWithFormat:@"http://ExampleOnly.com/path.ext%@", escapedQuery];