NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:self.title];
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor customBlueColor]range:NSMakeRange(1, 1)];
headlinelabel.attributedText = attributedString;
[headlinelabel sizeToFit];
设置字符串中某些字符的特殊效果
原文：http://www.cnblogs.com/gccbuaa/p/6885464.html
