Simple wrapper to support images programmatically for different userInterfaceStyle appearance.

AppearanceImage.swift

#if canImport(UIKit)
import UIKit

@propertyWrapper
public struct AppearanceImage {
    public var wrappedValue: UIImage { asset.image(with: .current) }

    let asset: UIImageAsset

    public init(light: UIImage, dark: UIImage) {
        let asset = UIImageAsset()
        asset.register(light, with: .init(userInterfaceStyle: .light))
        asset.register(dark, with: .init(userInterfaceStyle: .dark))
        self.asset = asset
    }

    public init(lightColor: UIColor, darkColor: UIColor, size: CGSize = .init(width: 1, height: 1)) {
        func renderImage(from color: UIColor) -> UIImage {
            return UIGraphicsImageRenderer(size: size).image {
                color.setFill()
                $0.fill(CGRect(origin: .zero, size: size))
            }
        }
        self.init(light: renderImage(from: lightColor), dark: renderImage(from: darkColor))
    }

    public init(appearanceColor: UIColor, size: CGSize = .init(width: 1, height: 1)) {
        self.init(
            lightColor: appearanceColor.resolvedColor(with: .init(userInterfaceStyle: .light)),
            darkColor: appearanceColor.resolvedColor(with: .init(userInterfaceStyle: .dark)),
            size: size
        )
    }
}
#endif