FROM THE ARCHIVES OF PRAGPUB MAGAZINE, JUNE 2018
Auto Layout, Playgrounds, and Xcode: When to Leave the Playground
by Erica Sadun
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Our favorite Swift wizard turns the answer to a question about centering a view into high-level content mode advice on when to use or not to use playgrounds.
Recently, someone asked what the easiest way was to center a view (specifically a UIImageView) inside a parent view with minimum offsets from the top and sides.
Because you’re working with image views, it’s important that you first set the For insets, it’s almost always best to go with a “fitting” aspect-scale, which preserves the entire picture even if it has to pillarbox or letterbox
(Pillarboxing adds extra spacing to each side for tall images; letterboxing adds the top and bottom for wide ones.)
