如何在没有SDK的Swift 3中在Facebook和Twitter App上共享

如果安装在设备上的按钮点击上，我需要在Facebook和Twitter应用程序上共享一些链接。我可以使用Whatsapp（下面的代码）共享相同的链接。我想知道我是否也可以在Facebook和Twitter应用程序中进行相同的操作。

  @IBAction func whatsappbtn(_ sender: UIButton) {

    var str = "This is the string which you want to share to WhatsApp"
    str=str.addingPercentEncoding(withAllowedCharacters: (NSCharacterSet.urlQueryAllowed))!
    let whatsappURL = URL(string: "whatsapp://send?text=\(str)")
    if UIApplication.shared.canOpenURL(whatsappURL!) {
        if #available(iOS 10.0, *) {
            UIApplication.shared.open(whatsappURL!, options: [:], completionHandler: nil)
        } else {
            // Fallback on earlier versions
        }
    } else {

        self.delegate?.alerting(msg: "Please install Whatsapp and try again.")

    }

}