swift - 如何确定 AVSpeechSynthesizer 速度 Swift？

Question

有人知道如何确定语音合成器的速度吗？现在听起来真的很快吗？

import UIKit
import AVFoundation

class ViewController: UIViewController {
var voice = AVSpeechSynthesizer()

override func viewDidLoad() {
    super.viewDidLoad()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

@IBAction func buttonPushed(sender: UIButton) {
    var utterance = AVSpeechUtterance(string:"This is a test")
    voice.speakUtterance(utterance)
}
}

Answer 1

为了降低语速，请使用 AVSpeechUtterance 类的速率属性

    let speechUtterance: AVSpeechUtterance = AVSpeechUtterance(string: "Sample text for speech")
    speechUtterance.voice = AVSpeechSynthesisVoice(language: "en-US")

    print("Default Speech Rate: " + String(speechUtterance.rate))

    speechUtterance.rate = 0.3

    let speechSynthesizer = AVSpeechSynthesizer()
    speechSynthesizer.speakUtterance(speechUtterance)