我一直试图让我的推子调整tts的音量" live"但是我不能。我只能在文本首次启动时设置音量。无论如何要做到这一点?
更新:我可以使用以下对viewcontroller的更改来访问该委托:
protocol theSpeechSynth {
func theSpeechSynthVar() -> AVSpeechSynthesizer
}
class GameViewController: UIViewController, theSpeechSynth, AVSpeechSynthesizerDelegate {
let theSpeechSynthesizer = AVSpeechSynthesizer()
func theSpeechSynthVar() -> AVSpeechSynthesizer {
return theSpeechSynthesizer
}
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer,
willSpeakRangeOfSpeechString characterRange: NSRange,
utterance: AVSpeechUtterance) {
print(utterance.volume)
utterance.volume = 1.0
print(utterance.volume)
}
func viewDidLoad() {
super.viewDidLoad()
tts.speechSynthesizer = theSpeechSynthVar()
...
}
}
import AVFoundation
class announceIt {
let voice = AVSpeechSynthesisVoice(identifier: AVSpeechSynthesisVoiceIdentifierAlex)
let speechSynthesizer = AVSpeechSynthesizer()
let voiceToUse = AVSpeechSynthesisVoice(language: "en-GB")
var speechUtterance: AVSpeechUtterance = AVSpeechUtterance()
func speak(speakIt: String) {
speechUtterance = AVSpeechUtterance(string: speakIt)
speechUtterance.voice = voiceToUse
// theVolumes.voice is constantly being updated by the fader
speechUtterance.volume = 0.5
speechSynthesizer.speak(speechUtterance)
}
func volumeChange() {
speechUtterance.volume = Float( theVolumes.voice )
}
}
调用它只是:
let tts: AnnounceIt = AnnounceIt()
// I added this for the delegate:
tts.speechSynthesizer = theSpeechSynthesizer // from the ViewController
tts.speak(speakIt: "I want this volume to go up and down when the volume changes but I can't get it do to that, it will only be the volume when it starts.")
打印:
0.5
1.0
1.0
1.0
1.0
1.0
...
音量不会增加......它不是话语的完整实现。
答案 0 :(得分:0)
在加入AVSpeechSynthesizer后更改类AVSpeechUtterance的属性将不会产生任何影响。请查看AVSpeechUtterance的文档。
/* Setting these values after a speech utterance has been enqueued will have no effect. */
open var rate: Float // Values are pinned between AVSpeechUtteranceMinimumSpeechRate and AVSpeechUtteranceMaximumSpeechRate.
open var pitchMultiplier: Float // [0.5 - 2] Default = 1
open var volume: Float // [0-1] Default = 1