Speechs text xxcode

import UIKit
import AVFoundation

class ViewController: UIViewController{
    
    @IBOutlet weak var sliderVolume: UISlider!  //for volume

    
    let speechSynth = AVSpeechSynthesizer()
    
    @IBAction func btnStartToSpeak(_ sender: UIButton) {
        
        let speechUtt = AVSpeechUtterance(string: "Hello")
        
      //  speechUtt.rate = self.sliderRate.value
        
        speechUtt.volume = self.sliderVolume.value
        
      //  speechUtt.pitchMultiplier = self.sliderPitch.value
        
        self.speechSynth.speak(speechUtt)
    }
}





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another and best code to speech text with any Language
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import UIKit
import AVFoundation

class ViewController: UIViewController, AVSpeechSynthesizerDelegate {
    
    
    
    @IBOutlet weak var sliderRate: UISlider!    //for rate
   
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    @IBAction func buttonPushed(sender: UIButton) {
        let utterance = AVSpeechUtterance(string:"채소는 건강에 좋아요")
        utterance.voice = AVSpeechSynthesisVoice(language: "ko-KR")
        let voice = AVSpeechSynthesizer()
        voice.delegate = self
        utterance.rate = self.sliderRate.value
        voice.speak(utterance)
    }
}