UIApplication Extension for Version and App Name

UIApplicationExt.swift

extension UIApplication {
    class var versionString: String {
        get {
            if let bundleInfoDictionary = NSBundle.mainBundle().infoDictionary {
                let buildVersionString = bundleInfoDictionary["CFBundleVersion"] as String
                let marketingVersionString = bundleInfoDictionary["CFBundleShortVersionString"] as String
                return marketingVersionString + " (\(buildVersionString))"
            } else {
                return "Unknown"
            }
        }
    }
    
    class var appName: String {
        get {
            if let bundleInfoDictionary = NSBundle.mainBundle().infoDictionary {
                let name = bundleInfoDictionary["CFBundleDisplayName"] as String
                return name
            } else {
                return "Unknown"
            }
        }
    }
}