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iOS 10.3
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使用
NSStrikethroughStyleAttributeName添加删除线失效
添加删除线经常用在商品原价情形下，使用NSStrikethroughStyleAttributeName添加删除线在 iOS10.3之前没什么问题，结果出来一个奇葩的版本10.3（10.3.1依然未解决这个 bug），删除线渲染不出来。
目前已知的有效解决方案如下：
方案1：（推荐）
Adding a
NSBaselineOffsetAttributeName, as explained here, to the attributed string brings back the strikethrough line. OverridingdrawText:in:can be slow especially on Collection View or Table View Cells.
方案2：（不推荐）
I make custom UILabel class and override drawText
function, it works forNSStrikethroughStyleAttributeName
attribute. But its not support multiple line texts in simple string
.
/// This UILabel subclass accomodates conditional fix for NSAttributedString rendering broken by Apple in iOS 10.3
final class PriceLabel: UILabel {
override func drawText(in rect: CGRect) {
guard let attributedText = attributedText else {
super.drawText(in: rect)
return
}
if #available(iOS 10.3, *) {
attributedText.draw(in: rect)
} else {
super.drawText(in: rect)
}
}
}
