设定字符串字符的颜色

NSString *title2=@"欢迎阅读《你好明天》声明";

    NSMutableAttributedString *att = [[NSMutableAttributedString alloc]initWithString:title2];

    [att addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(4, 5)];

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, 200, 250, 30)];

    label.font = [UIFont systemFontOfSize:14];

    label.text = title2;

    label.textColor = [UIColor lightGrayColor];

    label.attributedText = att;

    [self.view addSubview:label];