class ViewController: UIViewController {

    @IBOutlet weak var screenShotConfirm: UIImageView!
    var screenShotImage:UIImage!
    override func viewDidLoad() {
        super.viewDidLoad()
    }


    @IBAction func takeScreenShot(_ sender: Any) {

        let width = CGFloat(UIScreen.main.bounds.width)
        let height = CGFloat(UIScreen.main.bounds.height / 1.3)
        let size = CGSize(width:width,height:height)

        UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
        "viewに書き出す"
        self.view.drawHierarchy(in: view.bounds, afterScreenUpdates: true)
        screenShotImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()

       showToast()

    }
    @IBAction func share(_ sender: Any) {
        let item = [screenShotImage!] as [Any]
        let activityVC = UIActivityViewController(activityItems: item, applicationActivities: nil)

        present(activityVC, animated: true, completion: nil)
    }

    "トースト表示を作成"
    func showToast(){
        let toastLabel = UILabel()
        toastLabel.frame = CGRect(x:40, y: UIScreen.main.bounds.height - 58, width: 300, height: 40)
        toastLabel.text = "スクリーンショットを撮りました。"
        toastLabel.layer.borderWidth = 1.0
        toastLabel.textAlignment = .center
        toastLabel.layer.borderColor = #colorLiteral(red: 0.9254902005, green: 0.2352941185, blue: 0.1019607857, alpha: 1)
        toastLabel.layer.backgroundColor = #colorLiteral(red: 0.9254902005, green: 0.2352941185, blue: 0.1019607857, alpha: 1)
        toastLabel.layer.cornerRadius = 10
        toastLabel.textColor = .white
        self.view.addSubview(toastLabel)

        UIView.animate(withDuration: 2.5){
            toastLabel.alpha = 0.0
        }

        return
    }
}