Getting Version and Build Info with Swift

What was wrong with the Swift syntax? This seems to work:

if let text = Bundle.main.infoDictionary?["CFBundleVersion"] as? String {
    print(text)
}

Swift 3/4 Version

func version() -> String {
    let dictionary = Bundle.main.infoDictionary!
    let version = dictionary["CFBundleShortVersionString"] as! String
    let build = dictionary["CFBundleVersion"] as! String
    return "\(version) build \(build)"
} 

---

Swift 2.x Version

func version() -> String {
    let dictionary = NSBundle.mainBundle().infoDictionary!
    let version = dictionary["CFBundleShortVersionString"] as String
    let build = dictionary["CFBundleVersion"] as String
    return "\(version) build \(build)"
}

as seen here.

For the final release of Xcode 6 use

NSBundle.mainBundle().infoDictionary?["CFBundleVersion"] as? String

The "?" character after infoDictionary is important here