練習程式碼Segue轉場及傳值

@IBAction func myBtn(_ sender: UIButton) {
if let myTxt = myTxt.text {
if myTxt == "" {
let uiac = UIAlertController(title: "提醒", message: "請輸入訊息", preferredStyle: .alert)
let action = UIAlertAction(title: "OK", style: .default, handler: nil)
uiac.addAction(action)
present(uiac, animated: true, completion: nil)
} else {
performSegue(withIdentifier: "twoVC", sender: myTxt)
}
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "twoVC" {
if let twoVC = segue.destination as? TwoVC {
twoVC.infoFromOne = sender as? String
}
}
}

present能夠推出viewcontroller

ppresentSegueg是符合Seguegid

prepare可想成準備傳值前的預備動作