## AVSpeechSynthesizer

* アラートで入力した文字を音声で再生する

```swift
import UIKit
import AVFoundation

class ViewController: UIViewController {

    var speechText: String = ""

    override func viewDidLoad() {
        super.viewDidLoad()

    }

    @IBAction func showAlert(_ sender: UIButton) {

        let alert = UIAlertController(title: "今日の予定は？", message: "", preferredStyle: .alert)
        let speechAction = UIAlertAction(title: "Speech", style: .default, handler: { (_) -> Void in
            // TextFieldから値を取得
            if let text = alert.textFields?.first?.text {
                self.speechText = text
                self.voice()
            }
        })

        let cancel = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)

        alert.addAction(speechAction)
        alert.addAction(cancel)
        alert.addTextField { (textField) in }
        present(alert, animated: true, completion: nil)
    }

    func voice() {
        let talker = AVSpeechSynthesizer()
        let utterance = AVSpeechUtterance(string: "今日の予定は\(speechText)です。")
        utterance.voice = AVSpeechSynthesisVoice(language: "ja-JP")
        talker.speak(utterance)
    }
}

```