用NSAttributedString画下划线

UILabel *lable = [[UILabel alloc] initWithFrame:CGRectMake(20, 60, 100, 30)]; [self.view addSubview:lable]; lable.backgroundColor = [UIColor redColor]; lable.textAlignment = NSTextAlignmentCenter; NSString *oldPrice = @"￥ 999999"; NSUInteger length = [oldPrice length]; [self.view addSubview:lable]; NSMutableAttributedString *attri = [[NSMutableAttributedString alloc] initWithString:oldPrice]; [attri addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:NSMakeRange(0, length)]; [attri addAttribute:NSStrikethroughColorAttributeName value:[UIColor yellowColor] range:NSMakeRange(0, length)]; [lable setAttributedText:attri];