主要是通过富文本来进行变更

类似这样的效果

//设置价格删除线

NSAttributedString *attrStr =

[[NSAttributedString alloc]initWithString:self.price.text

attributes:

@{NSFontAttributeName:[UIFont systemFontOfSize:14.f],

NSForegroundColorAttributeName:[UIColor grayColor],

NSStrikethroughStyleAttributeName:@(NSUnderlineStyleSingle|NSUnderlinePatternSolid),

NSStrikethroughColorAttributeName:[UIColor redColor]}];

self.price.attributedText = attrStr;