相关疑难解决方法(0)

我有一个由 - 组成的字符串 -

lblWithText.backgroundColor = [UIColor clearColor];
    lblWithText.textColor = [UIColor blackColor];
    lblWithText.font = [UIFont fontWithName:@"Helvetica" size:12.0];
    lblWithText.text = [NSString stringWithFormat:@"Blah1:blah-blah%d. Blah2:-%d%%", [currentCoupon.couponPrice intValue],[currentCoupon.couponDiscountPercent intValue]];

请告诉我怎么做"Blah2: - %d %%""是Bolden？先谢谢你