iOS

Question

macOS: Mojave 10.14.4 beta

iOS: 12.2 beta

Xcode: 10.2 beta

我正在使用 AVSpeechSynthesizer 但下面的代码没有从暂停的地方恢复。

// The pause functionality works fine
if (synth.isSpeaking) {
   synth.pauseSpeaking(at: AVSpeechBoundary.word)
}


// But continueSpeaking always starting from the beginning.
if (synth.isPaused) {
   synth.continueSpeaking();
}

如何从我离开的地方继续？有什么我想念的吗？

Answer 1

我执行了以下代码来检查您的问题（在 Mojave 10.14.4、iOS 12.2、Xcode 10.2.1 和 swift 5.0 下进行的测试）:

class SpeechSynthesis: UIViewController {

    var synthesizer = AVSpeechSynthesizer()
    var playQueue = [AVSpeechUtterance]()

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        for i in 1...10 {
            let stringNb = "number " + String(i) + " of the speech synthesizer."
            let utterance = AVSpeechUtterance(string: stringNb)
            playQueue.append(utterance)
        }

        for utterance in playQueue {
            synthesizer.speak(utterance)
        }
    }

    @IBAction func pauseButton(_ sender: UIButton) {

        if (synthesizer.isSpeaking == true) {
            if (synthesizer.pauseSpeaking(at: .immediate) == true) {
                print("PAUSE")
            } else {
                print("P.R.O.B.L.E.M. when pausing.")
            }
        }
    }

    @IBAction func resumeButton(_ sender: UIButton) {

        if (synthesizer.isPaused == true) {
            if (synthesizer.continueSpeaking() == true) {
                print("CONTINUE")
            } else {
                print("P.R.O.B.L.E.M. when resuming.")
            }
        }
    }
}

我注意到边界 .word 的另一个问题在触发时并不总是暂停，但是当此 约束更改为 .immediate 时，一切都是从暂停处恢复。

然而，当它很少在边界 .word 处暂停时，它也会从它暂停的地方 always resumes。

我不知道你的问题出在哪里，但是通过上面提到的配置和这个代码片段，语音合成器从它暂停的地方恢复。

iOS - AVSpeechSynthesizer 暂停和继续说话问题

iOS - AVSpeechSynthesizer pause and continueSpeaking issue

text-to-speech

speech-synthesis

swift

swift4