On a screen made of complex cells with hundreds of constraints, the layout pass shows up as the bottleneck. Based on how the Auto Layout engine works, what drives the cost up?
The engine (a Cassowary variant) rebuilds and re-solves the equation system on every constraint add or remove, and the number of constraints, inequalities, and priority combinations raise the solving cost. Changing only constants needs just a re-solve and is comparatively cheap.
UIKitShort answerIntro
How is an Auto Layout constraint represented internally, as a formula?
#autolayout #constraint
UIKitMultiple choiceBasics
This Auto Layout code is meant to slide a panel up, but the panel jumps into place with…
#autolayout #constraint
UIKitMultiple choiceBasics
You've placed titleLabel and dateLabel side by side on one row with Auto Layout. When the…
#autolayout
UIKitShort answerBasics
You put a custom view you built (say, a tag chip view) into a UIStackView and it's sized…
#autolayout