text: //
  // Copyright (c) Microsoft. All rights reserved.
  // Licensed under the MIT license.
  //
  // Microsoft Cognitive Services (formerly Project Oxford): https://www.microsoft.com/cognitive-services
  //
  // Microsoft Cognitive Services (formerly Project Oxford) GitHub:
  // https://github.com/Microsoft/Cognitive-Speech-TTS
  //
  // Copyright (c) Microsoft Corporation
  // All rights reserved.
  //
  // MIT License:
  // Permission is hereby granted, free of charge, to any person obtaining
  // a copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to
  // permit persons to whom the Software is furnished to do so, subject to
  // the following conditions:
  //
  // The above copyright notice and this permission notice shall be
  // included in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED ""AS IS"", WITHOUT WARRANTY OF ANY KIND,
  // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  //
  
  import UIKit
  
  class ViewController: UIViewController, UITextFieldDelegate {
      
      override func viewDidLoad() {
          super.viewDidLoad()
      }
  
      func textFieldDidBeginEditing(_ textField: UITextField) {
          textField.becomeFirstResponder()
      }
      
      func textFieldShouldReturn(_ textField: UITextField) -> Bool {
          textField.resignFirstResponder()
          if let text = textField.text {
              DispatchQueue.global().async {
                  TTSVocalizer.sharedInstance.vocalize(text)
              }
          }
          return false
      }
  
  }
  