First Baseline and Last Baseline Properties in UIStackView

Question

What effect do the First Baseline and Last Baseline properties have on the subviews of a UIStackView?

Generally, can someone please illustrate the implementation of these values?

Answer 1

Suppose you have a two-line text view (or field or label or button) and a three-line text view, and you add them to a horizontal stack view. Do you want to align their first lines, or their last lines? That's the difference.

.FirstBaseline:

.LastBaseline:

Note: I increased the vertical content hugging and compression resistance priorities to 1000 (required) to get this to work properly.