swift spritekit Facebook share button

Question

Hey there my app is almost ready for release but i want to add a Facebook share button. The thing is i have no idea how the communication between the scene and the viewcontr

Answer 1

func lkFaceBookShare() {
    var serviceType: String = SLServiceTypeFacebook
    if !SLComposeViewController.isAvailableForServiceType(serviceType) {
        self.showUnavailableAlertForServiceType(serviceType)
    }
    else {
        var composeViewController: SLComposeViewController = SLComposeViewController.composeViewControllerForServiceType(serviceType)
        var keyWindow: UIWindow = UIApplication.sharedApplication().keyWindow
        var rect: CGRect = keyWindow.bounds
        UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, false, 0.5)
        self.view!.drawViewHierarchyInRect(rect, afterScreenUpdates: true)
        var viewImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        composeViewController.addImage(viewImage)
        var initalTextString: String = String(format: "Let's join together in the form of underground catch word go along with me!! Link: https://itunes.apple.com/us/app/uoi-hinh-bat-chu-gioi-duoi/id907330926?ls=1&mt=8")
        composeViewController.initialText = initalTextString
        var vc: UIViewController = self.view.window.rootViewController
        vc.presentViewController(composeViewController, animated: true, completion: { _ in })
    }
}

func showUnavailableAlertForServiceType(serviceType: String) {
    var serviceName: String = ""
    if serviceType == SLServiceTypeFacebook {
        serviceName = "Facebook"
    }
    else if serviceType == SLServiceTypeSinaWeibo {
        serviceName = "Sina Weibo"
    }
    else if serviceType == SLServiceTypeTwitter {
        serviceName = "Twitter"
    }

    var alertView: UIAlertView = UIAlertView(title: "Account", message: "Please go to the device settings and add a \(serviceName) account in order to share through that service", delegate: nil, cancelButtonTitle: "Dismiss", otherButtonTitles: "")
    alertView.show()
}

Swift Conversion of Obj-C answer posted by a very helpful user...... original post