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Pitfalls in calculating label size
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| // 1. 多行文本 | |
| let label = UILabel() | |
| label.font = Font.f14 | |
| label.numberOfLines = 2 // 若此处的行数限定为0（即可无数行），则以下面的 limitedToNumberOfLines 为准；否则两个行数中较小的那个会生效 | |
| label.text = model.svideoInfo.svideoTitle // 多行文本 | |
| let titleRect = label.textRect(forBounds: CGRect(origin: .zero, size: CGSize(width: cellWidth - margins.xInset, height: CGFloat.greatestFiniteMagnitude)), limitedToNumberOfLines: 0) | |
| // 事实上，用sizeThatFits(_:)就好了。 | |
| // 2. 单行文本 | |
| // 如果 label.numberOfLines 为默认值1，那么 label.siztThatFits(maxSize) 不受 maxSize.width 的限制。 | |
| // 这点委实蛋疼。 | |
| // 这意味着，你还得回归 textRect(forBounds:limitedToNumberOfLines:) 来解决问题 |
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-[UILabel sizeThatFits:]ignoresnumberOfLinesproperty,so
textRect(forBounds:is nearly always preferred.https://stackoverflow.com/questions/5041874/uilabels-sizetofit-sizethatfits-ignore-the-numberoflines-property