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Constraints for a child view controller within a subview


When a UIViewController is added within one of it's parent's subviews, there can be an issue where it doesn't expand to fill it. This can often happen when we only tested on a specific device size.

The fix involves preventing the auto-resizing mask from being turned into constraints and ensuring the child view controller's anchor constraints are all attached to the edge's of its container view.

child.view.translatesAutoresizingMaskIntoConstraints = false
child.view.attachAnchors(to: containerView)
child.didMove(toParent: self)

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Andrew Lord

A software developer and tech leader from the UK. Writing articles that focus on all aspects of Android and iOS development using Kotlin and Swift.

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