父视图根据内容高度自动调整(sizetoFit与自动约束) 2017-07-12 本文已影响21人 leonardni 只有20%的iOS程序员能看懂：详解intrinsicContentSize 及 约束优先级／content Hugging／content Compression Resistance https://stackoverflow.com/questions/24127032/proper-usage-of-intrinsiccontentsize-and-sizethatfits-on-uiview-subclass-with-a
