UILable的text设置中划线(删除线)

   NSDictionary *attribtDic = @{NSStrikethroughStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleSingle]};
    NSMutableAttributedString *attribtStr = [[NSMutableAttributedString alloc]initWithString:@"  价格：40" attributes:attribtDic];
    label.attributedText = attribtStr;