Question

我正在使用JavaScript SpeechSynthesis API。但是，我发现它在iOS 12中无法正常工作。speechSynthesis.speak仅在SpeechSynthesisUtterance.lang为英语时才有效。其他所有语言都不会发出语音。

const synth = window.speechSynthesis;
const utterThis = new SpeechSynthesisUtterance("");
let jpVoice = null;
let enVoice = null;

function loadVoice() {
  const voices = synth.getVoices();
  jpVoice = R.filter(function(target) {
    return target.lang === "ja-JP";
  }, voices)[0];
  enVoice = R.filter(function(target) {
    return target.lang === "en-US";
  }, voices)[0];
}
if ("onvoiceschanged" in speechSynthesis) {
  window.speechSynthesis.onvoiceschanged = loadVoice;
} else {
  loadVoice();
}

const speak = () => {
  utterThis.text = "こんにちは、世界！";
  utterThis.lang = "ja-JP";
  utterThis.voice = jpVoice;
  synth.speak(utterThis);
};

const speakWork = () => {
  utterThis.text = "Hello, World!";
  utterThis.lang = "en-US";
  utterThis.voice = enVoice;
  synth.speak(utterThis);
};

const btn = document.getElementById("speak");
const btnWork = document.getElementById("speak-work");

btn.onclick = speak;
btnWork.onclick = speakWork;

<script src="//cdn.jsdelivr.net/npm/ramda@latest/dist/ramda.min.js"></script>
<html>
<head>
	<title></title>
</head>

<body>

	<button id="speak">This work not on ios 12</button><br/>
	<button id="speak-work">This work on ios 12</button>
</body>

</html>

这是我的代码： https://codesandbox.io/s/lpyk1jjpv9

请帮助！

Javascript语音合成无法在iOS 12上运行

0 个答案: