为什么 StackViews 没有内在的内容大小？

Question

I've always wondered why UIStackviews don't have an intrinsic content size? What is Apple's reasoning for not having them calculate the intrinsic content size like a normal View does?

I use stackViews in autoresizing tableView cells, and I usually have to custom subclass the StackView to make the intrinsic content size be calculated correctly.

Answer 1

它确实具有分配类型.fill的内在内容大小，但这需要子视图具有内在内容大小，如标签和按钮，否则给它们一个高度，还要确保在单元格内从上到下正确挂钩约束