ios UILabel 添加删除线或者下滑线

//添加删除线
UILabel  *strLabel = [[UILabel alloc] initWithFrame:(CGRectMake(10, 10, 120, 30))];
NSString *textStr = [NSString stringWithFormat:@"从现在开始"];

NSDictionary *attribtDic = @{NSStrikethroughStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleSingle]};
NSMutableAttributedString *attribtStr = [[NSMutableAttributedString alloc] initWithString:textStr attributes:attribtDic];

strLabel.attributedText = attribtStr;
[self.view addSubview:strLabel];

//添加下划线
UILabel *strLabel = [[UILabel alloc] initWithFrame:(CGRectMake(10, 10, 120, 30))];
NSString *textStr = [NSString stringWithFormat:@"坚持就是信仰"];

NSDictionary *attribtDiction = @{NSUnderlineStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleSingle]};
NSMutableAttributedString *attribtString = [[NSMutableAttributedString alloc] initWithString:textStr attributes:attribtDiction];

strLabel.attributedText = attribtString;
[self.view addSubview:strLabel];