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Web语音API:始终在iOS Safari中获得受支持的语音合成语音

本文介绍了Web语音API:始终在iOS Safari中获得受支持的语音合成语音的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试获取iOS Safari上支持的语音合成语音的列表.

I'm trying to get the list of supported speech synthesis voices on iOS Safari.

按照API，我应该能够通过调用以下方法获得声音:

As per the API, I should be able to get an array of voices by calling:

window.speechSynthesis.getVoices();

有时这会给我一些声音列表，而其他时候却没有.请参阅以下jsfiddle: https://jsfiddle.net/sq7xf327/

Sometimes this gives me list of voices, other times it doesn't. See the following jsfiddle: https://jsfiddle.net/sq7xf327/

如果我在iPhone 5(iOS 8.1.3)上打开它，则不会获得一致的结果.有时我会退回所有37种声音，而其他时候我会退回0种声音.如果您继续刷新，则会偶尔显示37或0.

If I open this on my iPhone 5 (iOS 8.1.3), I don't get back consistent results. Sometimes I get back all 37 voices, and other times I get returned 0 voices. If you keep on refreshing it sporadically displays either 37 or 0.

我知道您可以在Chrome中将事件监听器添加到

I know that in Chrome you can add an event listener to the 

window.speechSynthesis.voiceschanged

事件以了解何时加载了语音，但Safari不支持此事件.

event to know when the voices have loaded, but this event is not supported in Safari.

我尝试过的一个技巧是定期检查:

A trick I've tried is to check periodically:

var timer = setInterval(function () {
    window.voices_ = window.speechSynthesis.getVoices();
    if (window.voices_.length > 0) {
        clearInterval(timer);
    }
}, 1000);

这也没有给我一致的结果.

This has also not given me consistent results.

您知道我如何才能在iOS Safari上可靠，一致地获得受支持的语音合成语音吗?

Any idea how I can reliably and consistently get the supported speech synthesis voices on iOS Safari?

推荐答案

我也遇到了这个问题，并将其作为错误报告给了Apple.到今天为止，错误报告仍处于打开状态.

I also encountered this and reported it as a bug to Apple. As of today the bug report is still open.

我最终作为变通办法是对37种声音的阵列进行硬编码.如果 speechSynthesis.getVoices()返回一个空数组，则使用硬编码数组.

What I ended up doing as workaround was to hard-code an array of the 37 voices. If speechSynthesis.getVoices() returns an empty array then use the hard-coded array instead. 

var _voices = [];

// iOS 8
var _iOSvoices = [
    {name: "pt-BR", voiceURI: "pt-BR", lang: "pt-BR", localService: true, default: true},
    {name: "fr-CA", voiceURI: "fr-CA", lang: "fr-CA", localService: true, default: true},
    {name: "sk-SK", voiceURI: "sk-SK", lang: "sk-SK", localService: true, default: true},
    {name: "th-TH", voiceURI: "th-TH", lang: "th-TH", localService: true, default: true},
    {name: "ro-RO", voiceURI: "ro-RO", lang: "ro-RO", localService: true, default: true},
    {name: "no-NO", voiceURI: "no-NO", lang: "no-NO", localService: true, default: true},
    {name: "fi-FI", voiceURI: "fi-FI", lang: "fi-FI", localService: true, default: true},
    {name: "pl-PL", voiceURI: "pl-PL", lang: "pl-PL", localService: true, default: true},
    {name: "de-DE", voiceURI: "de-DE", lang: "de-DE", localService: true, default: true},
    {name: "nl-NL", voiceURI: "nl-NL", lang: "nl-NL", localService: true, default: true},
    {name: "id-ID", voiceURI: "id-ID", lang: "id-ID", localService: true, default: true},
    {name: "tr-TR", voiceURI: "tr-TR", lang: "tr-TR", localService: true, default: true},
    {name: "it-IT", voiceURI: "it-IT", lang: "it-IT", localService: true, default: true},
    {name: "pt-PT", voiceURI: "pt-PT", lang: "pt-PT", localService: true, default: true},
    {name: "fr-FR", voiceURI: "fr-FR", lang: "fr-FR", localService: true, default: true},
    {name: "ru-RU", voiceURI: "ru-RU", lang: "ru-RU", localService: true, default: true},
    {name: "es-MX", voiceURI: "es-MX", lang: "es-MX", localService: true, default: true},
    {name: "zh-HK", voiceURI: "zh-HK", lang: "zh-HK", localService: true, default: true},
    {name: "sv-SE", voiceURI: "sv-SE", lang: "sv-SE", localService: true, default: true},
    {name: "hu-HU", voiceURI: "hu-HU", lang: "hu-HU", localService: true, default: true},
    {name: "zh-TW", voiceURI: "zh-TW", lang: "zh-TW", localService: true, default: true},
    {name: "es-ES", voiceURI: "es-ES", lang: "es-ES", localService: true, default: true},
    {name: "zh-CN", voiceURI: "zh-CN", lang: "zh-CN", localService: true, default: true},
    {name: "nl-BE", voiceURI: "nl-BE", lang: "nl-BE", localService: true, default: true},
    {name: "en-GB", voiceURI: "en-GB", lang: "en-GB", localService: true, default: true},
    {name: "ar-SA", voiceURI: "ar-SA", lang: "ar-SA", localService: true, default: true},
    {name: "ko-KR", voiceURI: "ko-KR", lang: "ko-KR", localService: true, default: true},
    {name: "cs-CZ", voiceURI: "cs-CZ", lang: "cs-CZ", localService: true, default: true},
    {name: "en-ZA", voiceURI: "en-ZA", lang: "en-ZA", localService: true, default: true},
    {name: "en-AU", voiceURI: "en-AU", lang: "en-AU", localService: true, default: true},
    {name: "da-DK", voiceURI: "da-DK", lang: "da-DK", localService: true, default: true},
    {name: "en-US", voiceURI: "en-US", lang: "en-US", localService: true, default: true},
    {name: "en-IE", voiceURI: "en-IE", lang: "en-IE", localService: true, default: true},
    {name: "he-IL", voiceURI: "he-IL", lang: "he-IL", localService: true, default: true},
    {name: "hi-IN", voiceURI: "hi-IN", lang: "hi-IN", localService: true, default: true},
    {name: "el-GR", voiceURI: "el-GR", lang: "el-GR", localService: true, default: true},
    {name: "ja-JP", voiceURI: "ja-JP", lang: "ja-JP", localService: true, default: true}
];

function populateVoices() {
    // wait first
    var watch = setTimeout(function() {
        _voices = speechSynthesis.getVoices();

        if (_voices.length === 0) {
            // use hard-coded list because speechSynthesis.getVoices() didn't work
            _voices = _iOSvoices;
        }

        clearTimeout(watch);
    }, 100);
}

更新

如果您删除延迟，iOS 9在此方面会更好一些.

iOS 9 is somewhat better at this if you remove the delay.

function _populateVoices() {
    _voices = speechSynthesis.getVoices();

    if (_voices.length === 0) {
        // use hard-coded list because speechSynthesis.getVoices() didn't work
        _voices = _iOS9voices;
    }
}

var _iOS9voices = [
  { name: "Maged", voiceURI: "com.apple.ttsbundle.Maged-compact", lang: "ar-SA", localService: true, "default": true },
  { name: "Zuzana", voiceURI: "com.apple.ttsbundle.Zuzana-compact", lang: "cs-CZ", localService: true, "default": true },
  { name: "Sara", voiceURI: "com.apple.ttsbundle.Sara-compact", lang: "da-DK", localService: true, "default": true },
  { name: "Anna", voiceURI: "com.apple.ttsbundle.Anna-compact", lang: "de-DE", localService: true, "default": true },
  { name: "Melina", voiceURI: "com.apple.ttsbundle.Melina-compact", lang: "el-GR", localService: true, "default": true },
  { name: "Karen", voiceURI: "com.apple.ttsbundle.Karen-compact", lang: "en-AU", localService: true, "default": true },
  { name: "Daniel", voiceURI: "com.apple.ttsbundle.Daniel-compact", lang: "en-GB", localService: true, "default": true },
  { name: "Moira", voiceURI: "com.apple.ttsbundle.Moira-compact", lang: "en-IE", localService: true, "default": true },
  { name: "Samantha (Enhanced)", voiceURI: "com.apple.ttsbundle.Samantha-premium", lang: "en-US", localService: true, "default": true },
  { name: "Samantha", voiceURI: "com.apple.ttsbundle.Samantha-compact", lang: "en-US", localService: true, "default": true },
  { name: "Tessa", voiceURI: "com.apple.ttsbundle.Tessa-compact", lang: "en-ZA", localService: true, "default": true },
  { name: "Monica", voiceURI: "com.apple.ttsbundle.Monica-compact", lang: "es-ES", localService: true, "default": true },
  { name: "Paulina", voiceURI: "com.apple.ttsbundle.Paulina-compact", lang: "es-MX", localService: true, "default": true },
  { name: "Satu", voiceURI: "com.apple.ttsbundle.Satu-compact", lang: "fi-FI", localService: true, "default": true },
  { name: "Amelie", voiceURI: "com.apple.ttsbundle.Amelie-compact", lang: "fr-CA", localService: true, "default": true },
  { name: "Thomas", voiceURI: "com.apple.ttsbundle.Thomas-compact", lang: "fr-FR", localService: true, "default": true },
  { name: "Carmit", voiceURI: "com.apple.ttsbundle.Carmit-compact", lang: "he-IL", localService: true, "default": true },
  { name: "Lekha", voiceURI: "com.apple.ttsbundle.Lekha-compact", lang: "hi-IN", localService: true, "default": true },
  { name: "Mariska", voiceURI: "com.apple.ttsbundle.Mariska-compact", lang: "hu-HU", localService: true, "default": true },
  { name: "Damayanti", voiceURI: "com.apple.ttsbundle.Damayanti-compact", lang: "id-ID", localService: true, "default": true },
  { name: "Alice", voiceURI: "com.apple.ttsbundle.Alice-compact", lang: "it-IT", localService: true, "default": true },
  { name: "Kyoko", voiceURI: "com.apple.ttsbundle.Kyoko-compact", lang: "ja-JP", localService: true, "default": true },
  { name: "Yuna", voiceURI: "com.apple.ttsbundle.Yuna-compact", lang: "ko-KR", localService: true, "default": true },
  { name: "Ellen", voiceURI: "com.apple.ttsbundle.Ellen-compact", lang: "nl-BE", localService: true, "default": true },
  { name: "Xander", voiceURI: "com.apple.ttsbundle.Xander-compact", lang: "nl-NL", localService: true, "default": true },
  { name: "Nora", voiceURI: "com.apple.ttsbundle.Nora-compact", lang: "no-NO", localService: true, "default": true },
  { name: "Zosia", voiceURI: "com.apple.ttsbundle.Zosia-compact", lang: "pl-PL", localService: true, "default": true },
  { name: "Luciana", voiceURI: "com.apple.ttsbundle.Luciana-compact", lang: "pt-BR", localService: true, "default": true },
  { name: "Joana", voiceURI: "com.apple.ttsbundle.Joana-compact", lang: "pt-PT", localService: true, "default": true },
  { name: "Ioana", voiceURI: "com.apple.ttsbundle.Ioana-compact", lang: "ro-RO", localService: true, "default": true },
  { name: "Milena", voiceURI: "com.apple.ttsbundle.Milena-compact", lang: "ru-RU", localService: true, "default": true },
  { name: "Laura", voiceURI: "com.apple.ttsbundle.Laura-compact", lang: "sk-SK", localService: true, "default": true },
  { name: "Alva", voiceURI: "com.apple.ttsbundle.Alva-compact", lang: "sv-SE", localService: true, "default": true },
  { name: "Kanya", voiceURI: "com.apple.ttsbundle.Kanya-compact", lang: "th-TH", localService: true, "default": true },
  { name: "Yelda", voiceURI: "com.apple.ttsbundle.Yelda-compact", lang: "tr-TR", localService: true, "default": true },
  { name: "Ting-Ting", voiceURI: "com.apple.ttsbundle.Ting-Ting-compact", lang: "zh-CN", localService: true, "default": true },
  { name: "Sin-Ji", voiceURI: "com.apple.ttsbundle.Sin-Ji-compact", lang: "zh-HK", localService: true, "default": true },
  { name: "Mei-Jia", voiceURI: "com.apple.ttsbundle.Mei-Jia-compact", lang: "zh-TW", localService: true, "default": true }
];

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08-12 15:40
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