ios - AVSpeechSynthesizer 使用一次后无法正常工作

Question

我正在使用 AVSpeechSynthesizer 为一些文本数据发声，它第一次可以工作，但之后就没用了。

我收到以下消息。

错误:-

AppName[859:101035] [AXTTSCommon] Failure starting audio queue alp! 2018-10-26 18:06:53.253536+0530 AppName[859:101035] [AXTTSCommon] _BeginSpeaking: couldn't begin playback

下面我分享我的代码。

 let synth = AVSpeechSynthesizer()

 fileprivate func speakText(voiceOutdata: String )
 {
    let utterance = AVSpeechUtterance(string: voiceOutdata)
    utterance.voice = AVSpeechSynthesisVoice(language: "en-US")
    synth.speak(utterance)
 }

Answer 1

您需要设置AVAudioSession 来执行这些任务。这是我的工作代码。希望这可以帮助。

func speakText(voiceOutdata: String ) {
    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playAndRecord, mode: .default, options: .defaultToSpeaker)
        try AVAudioSession.sharedInstance().setActive(true, options: .notifyOthersOnDeactivation)
    } catch {
        print("audioSession properties weren't set because of an error.")
    }

    let utterance = AVSpeechUtterance(string: voiceOutdata)
    utterance.voice = AVSpeechSynthesisVoice(language: "en-US")

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

    defer {
        disableAVSession()
    }
}

private func disableAVSession() {
    do {
        try AVAudioSession.sharedInstance().setActive(false, options: .notifyOthersOnDeactivation)
    } catch {
        print("audioSession properties weren't disable.")
    }
}