AVSpeechSynthesizer + SwiftUI

synth.swift

import SwiftUI
import AVFoundation

struct ContentView: View {
  var synthVM = SynthViewModel()
  
  var body: some View {
    VStack {
      Text("This is Office Hours")
      
      Button(action: {
        self.synthVM.speak(text: "This is Office Hours. Thanks for your questions!")
      }) {
        Text("Play")
      }
    }
  }
}

struct ContentView_Previews: PreviewProvider {
  static var previews: some View {
    ContentView()
  }
}



class SynthViewModel: NSObject {
  private var speechSynthesizer = AVSpeechSynthesizer()
  
  override init() {
    super.init()
    self.speechSynthesizer.delegate = self
  }
  
  func speak(text: String) {
    let utterance = AVSpeechUtterance(string: text)
    speechSynthesizer.speak(utterance)
  }
}

extension SynthViewModel: AVSpeechSynthesizerDelegate {
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didStart utterance: AVSpeechUtterance) {
    print("started")
  }
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didPause utterance: AVSpeechUtterance) {
    print("paused")
  }
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didContinue utterance: AVSpeechUtterance) {}
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didCancel utterance: AVSpeechUtterance) {}
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, willSpeakRangeOfSpeechString characterRange: NSRange, utterance: AVSpeechUtterance) {}
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) {
    print("finished")
  }
}