Integration new facebook SDK by swift

Question

Today i tried to integrate facebook SDK to my Swift app but in the quick start on facebook guide page looks a bit different than my old code. How can i convert OBJ-C code be

Answer 1

Since I want to support iOS 8, I have modified the function application(_:open:options:) in Whitney Foster's answer to

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    let appId = SDKSettings.appId
    if url.scheme != nil && url.scheme!.hasPrefix("fb\(appId)") && url.host ==  "authorize" { // facebook
        if #available(iOS 9.0, *) {
            return SDKApplicationDelegate.shared.application(app, open: url, options: options)
        }
    }
    return false
}

and implemented additional fallback function

// Fallback on earlier versions
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
    return SDKApplicationDelegate.shared.application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
}