NSString *name = nil;

    if (_payNumber == 1) { 

        name = [NSString stringWithFormat:@"向%@收款",nameStr];

    }else if (_payNumber == 2){  

        name = [NSString stringWithFormat:@"向%@付款",nameStr];

    }

    //富文本

    NSMutableAttributedString *abs = [[NSMutableAttributedString alloc] initWithString:name];

    shopNameLabel = [[UILabel alloc] init];

    shopNameLabel.font = [UIFont systemFontOfSize:17];

    shopNameLabel.textColor = [UIColor colorWithHexString:@"#666666"];

    //字体加粗

    [abs addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:17.0] range:NSMakeRange(1, nameStr.length)];

    //颜色

    [abs addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithHexString:@"#333333"] range:NSMakeRange(1, nameStr.length)];

    shopNameLabel.attributedText = abs;

    [shopNameLabel sizeToFit];     //取shopNameLabel.frame.size.width

    shopNameLabel.frame = CGRectMake((self.view.frame.size.width - shopNameLabel.frame.size.width)/ 2, shopLogoImg.frame.size.height + shopLogoImg.frame.origin.y + 15, shopNameLabel.frame.size.width, 25);

    shopNameLabel.textAlignment = NSTextAlignmentCenter;

    [shopInfoView addSubview:shopNameLabel];

iOS富文本的使用