A UIImage extension that returns a system image on iOS 13, otherwise returns an image from the Bundle provided.

SFSymbols.swift

extension UIImage {
    /// Returns a system image on iOS 13, otherwise returns an image from the Bundle provided.
    convenience init?(nameOrSystemName: String, in bundle: Bundle? = Bundle.main, compatibleWith traitCollection: UITraitCollection? = nil) {
        if #available(iOS 13, *) {
            self.init(systemName: nameOrSystemName, compatibleWith: traitCollection)
        } else {
            self.init(named: nameOrSystemName, in: bundle, compatibleWith: traitCollection)
        }
    }
}

// Sample usage:
// let image = UIImage(nameOrSystemName: "ellipses.bubble.fill")