differenct color in same lable using objective C

whateverController.m

//AtrributedString for different color.
			NSString *str = [NSString stringWithFormat:@"You Have Selected %@", treeModel.name];
			NSMutableAttributedString *message = [[NSMutableAttributedString alloc] initWithString:str];
			[message addAttribute: NSForegroundColorAttributeName value:[UIColor blackColor] range:[str rangeOfString:[NSString stringWithFormat:@"%@",treeModel.name]]];
			
			cell1.descriptionLabel.attributedText = message;