Protocols

Anything that exposes layout anchors. In our use this will be UIView and UILayoutGuide. This abstracts away the differences between them such that we can pass either a view or a layout guide to our constrain methods that act upon anchors.

Any named color asset that can be loaded from an asset catalog (primarily for use with string-based enums).

All properties and functions have default implementations. At a minimum just have your string-based enum conform to Colorable (and have an asset catalog with matching assets). If your enum and assets live inside a Swift package, override bundle to return .module. If your assets are categorized within their asset catalog by a namespace, then override namespace to return the proper string prefix.

Any named image asset can be loaded from an asset catalog.

All properties and functions have default implementations. At a minimum just have your string-based enum conform to ImageAsset (and have an asset catalog with matching assets). If your enum and assets live inside a Swift package, override bundle to return .module. If your assets are categorized within their asset catalog by a namespace, then override namespace to return the proper string prefix.

Any string resource that can be localized (primarily for use with string-based enums)

Any string corresponding to a system image (SF Symbols).

All properties and functions have default implementations. At a minimum just have your string-based enum conform to SystemImage. The raw value of the enum should match a sytem image name (e.g. checkmark.seal).