myrickchow32

func transitionAnimation(view: UIView, animationOptions: UIView.AnimationOptions, isReset: Bool) {
  // Combine transition annimation option with other animation options
  let combinedAnimationOptions: UIView.AnimationOptions = [animationOptions, .allowUserInteraction, .autoreverse, .repeat]
  
  UIView.transition(with: view, duration: durationOfAnimationInSecond, options: combinedAnimationOptions, animations: {
    view.backgroundColor = UIColor.init(named: isReset ? "darkGreen" :  "darkRed")
  }, completion: nil)
}

myrickchow32

import Foundation
import AVFoundation

class VoiceUtils {
  
  static var avSpeechSynthesizer = AVSpeechSynthesizer()
  
  static func textToSpeech(text: String, delegate: AVSpeechSynthesizerDelegate?) {
    /*
     Support langauges:

myrickchow32

import AVFoundation

let avSpeechSynthesizer = AVSpeechSynthesizer()

myrickchow32

let utterance = AVSpeechUtterance(string: "Hello world")

myrickchow32

let speechVoices = AVSpeechSynthesisVoice.speechVoices()
speechVoices.forEach { (voice) in
  print("**********************************")
  print("Voice identifier: \(voice.identifier)")
  print("Voice language: \(voice.language)")
  print("Voice name: \(voice.name)")
  print("Voice quality: \(voice.quality.rawValue)") // Compact: 1 ; Enhanced: 2
}

/*

myrickchow32

let utterance = AVSpeechUtterance(string: "Hello world")

// Method 1: Directly by identifier
utterance.voice = AVSpeechSynthesisVoice(identifier: "com.apple.ttsbundle.Karen-compact")

// Method 2: By langauge code
utterance.voice = AVSpeechSynthesisVoice(language: "en-AU") 

myrickchow32

let utterance = AVSpeechUtterance(string: "Hello world")
utterance.volume = 0.5 // Range: 0.0 - 1.0 ; A relative volume to the device volume

myrickchow32

/*
   Range: 0.0 - 1.0
   AVSpeechUtteranceMinimumSpeechRate: 0.0
   AVSpeechUtteranceMaximumSpeechRate: 1.0
   AVSpeechUtteranceDefaultSpeechRate: 0.5
 */
let utterance = AVSpeechUtterance(string: "Hello world")
utterance.rate = 0.5 

myrickchow32

/* 
  Pitch multiplier range: 0.5 to 2.0
  Default value: 1.0
*/
let utterance = AVSpeechUtterance(string: "Hello world")
utterance.pitchMultiplier = 1.0

myrickchow32

import AVFoundation

let avSpeechSynthesizer = AVSpeechSynthesizer()
avSpeechSynthesizer.delegate = self

// Session 1 --- AVSpeechUtterance: 7 Parameters of synthesized speech 
let utterance = AVSpeechUtterance(string: "Hello world")
utterance.voice = ... 
utterance.rate = ...
utterance.pitchMultiplier = ...