ios - 同时使用两个 AVSpeechSynthesizer 实例

Question

我想同时使用两个 AVSpeechSynthesizer 实例。

let firstSynthesizer = AVSpeechSynthesizer()
let secondSynthesizer = AVSpeechSynthesizer()

func foo() {
   let utterance = AVSpeechUtterance(string: "Foo Foo Foo Foo Foo")
   utterance.rate = 0.4
   utterance.voice = AVSpeechSynthesisVoice(language: "en-US")
   firstSynthesizer.speak(utterance)
}

func bar() {
   let utterance = AVSpeechUtterance(string: "Bar Bar Bar Bar Bar")
   utterance.rate = 0.4
   utterance.voice = AVSpeechSynthesisVoice(language: "en-US")
   secondSynthesizer.speak(utterance)
}

当我调用 foo() 和 bar() 时，文本不是同时读取而是一个接一个读取。

Answer 1

I would like to use two instances of AVSpeechSynthesizer simultaneously.

这在 iOS 12 中肯定是不可能的，一次只处理一个语音合成。

然而，an audio session可以和语音合成一起播放。