Creating a Hit List URL with + symbols in query items properly encoded

gistfile1.m

- (NSURL *)hitListURLWithTaskTitle:(NSString *)title {
  // Basic URL as a starting point
  NSURLComponents *components = [NSURLComponents componentsWithString:@"thehitlist:///inbox/tasks"];
  
  components.queryItems = @[
    [NSURLQueryItem queryItemWithName:@"method" value:@"POST"],
    [NSURLQueryItem queryItemWithName:@"title" value:title]
  ];
  
  // NSURLQueryItem has encoded any spaces as %20 which is fine
  // But + symbols are untouched, which will be mis-interpreted
  // So post-process to encode them ourselves
  components.percentEncodedQuery = [components.percentEncodedQuery
    stringByReplacingOccurrencesOfString:@"+"
    withString:@"%2B"];
  
  return components.URL;
}