Swift 文字转语音

Question

我有一段代码无法运行，但也没有出现运行时错误。演讲者没有讲话。

let synth = AVSpeechSynthesizer()
var myUtterance = AVSpeechUtterance(string: audioTextField.text)
myUtterance.rate = 0.3
synth.speak(myUtterance)

是否有任何我遗漏的代码或其他代码？将不胜感激。

编辑：它在任何@IBActions 中都不起作用，但在加载函数的视图中工作正常....

override func viewDidLoad() {
    super.viewDidLoad()
    speechRecognizer?.delegate = self
    timer = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(tick), userInfo: nil, repeats: true)
    tick()
    requestSpeechAuth()
//WORKS HERE
}

@IBAction func audioButtonPressed(_ sender: Any) {
//DOESN"T WORK HERE    
    if isRecording {
        stopRecording()
    } else {
        startRecording()
    }
}

Answer 1

此代码有效（来自 Apple 文档）

let string = "Hello, World!"
let utterance = AVSpeechUtterance(string: string)
utterance.voice = AVSpeechSynthesisVoice(language: "en-US")

let synth = AVSpeechSynthesizer()
synth.speak(utterance)

记得导入 AVFoundation

import AVFoundation

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