[iOS][swift]App version정보 가져오기

var version: String? {
    guard let dictionary = Bundle.main.infoDictionary,
        let version = dictionary["CFBundleShortVersionString"] as? String,
        let build = dictionary["CFBundleVersion"] as? String else {return nil}

    let versionAndBuild: String = "vserion: \(version), build: \(build)"
    return versionAndBuild
}