Todayssky

extension Bundle {
    var appName: String {
        return infoDictionary?["CFBundleName"] as! String
    }

    var bundleId: String {
        return bundleIdentifier!
    }

    var versionNumber: String {
        return infoDictionary?["CFBundleShortVersionString"] as! String
    }

    var buildNumber: String {
        return infoDictionary?["CFBundleVersion"] as! String
    }
}

사용할 때에는 아래와 같이 사용합니다.

let str = "\(Bundle.main.appName) v \(Bundle.main.versionNumber) (Build \(Bundle.main.buildNumber))"

출처: https://stackoverflow.com/questions/25965239/how-do-i-get-the-app-version-and-build-number-using-swift