UIAlertController+Extension

UIAlertController+Extension.swift

// Extension

extension UIAlertController {
    convenience init(with error: Error) {
        var title: String!
        var message: String!

        if let error = error as? LocalizedError, let errorDescription = error.errorDescription {
            title = errorDescription

            if let recoverySuggestion = error.recoverySuggestion {
                message = recoverySuggestion
            }
        } else {
            let nativeError = error as NSError
            title = nativeError.localizedDescription
            message = nativeError.localizedRecoverySuggestion ?? ""
        }

        self.init(title: title, message: message, preferredStyle: .alert)
        addOKAction()
    }

    func addOKAction() {
        addAction(UIAlertAction(title: NSLocalizedString("OK", comment: ""), style: .cancel, handler: nil))
    }
}

// Implementation

let alert = UIAlertController(with: error)
self.present(alert, animated: true, completion: nil)