iOS Trapped uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN'

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在设置一个​​视图A​​​的​​frame​​​时，忘记设置它的高度了
然后又通过​​​视图A​​​的​​frame​​​来生成​​视图B​​​的​​frame​​​ 导致​​视图B​​的​​frame​​出现了无穷大​​∞​​

po _msgView.frame
(origin = (x = 59.5, y = 92), size = (width = 194.5, height = 0))

_msgLabel.frame = CGRectInset(_msgView.frame, 15, 10);
po _msgLabel.frame
(origin = (x = +Inf, y = +Inf), size = (width = 0, height = 0))

直接导致​​崩溃!!!​​

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一个有趣的Button

​​https://github.com/xjh093/JHLikeButton​​

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