Surprises When Designing An iPhone App(jackg.org)

  NSString *theEntireLineOfText = @"Hello World";
  UIColor *boldColor = [UIColor blackColor];
  UIFont *myFont = [UIFont fontWithName:@"Helvetica" size:12.0];
  UIColor *baseColor = [UIColor grayColor];
  NSDictionary *subAttrs = [NSDictionary dictionaryWithObjectsAndKeys:
                              myFont, NSFontAttributeName, boldColor,NSForegroundColorAttributeName, nil];
   NSMutableAttributedString *mainText = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@",theEntireLineOfText] attributes:@{NSFontAttributeName:myFont,NSForegroundColorAttributeName:baseColor}];
  // Make the word "World" black"
  NSRange range = NSMakeRange(0,[@"World" length]);
        [mainText setAttributes:subAttrs range:range];