标签： AVFoundation
AVSpeechSynthesizer
An object that produces synthesized speech from text utterances and provides controls for monitoring or controlling ongoing speech
AV Foundation中提供了一个AVSpeechSynthesizer类来向app中添加朗诵文本的功能.
这个类用来播放一个或者多个语音内容,每条语音内容都是一个AVSpeechUtterance对象.
(一个语音合成器(SpeechSynthesizer)播放需要一段文本内容(SpeechUtterance))
AVSpeechSynthesizer 常用函数
var speech : AVSpeechSynthesizer = AVSpeechSynthesizer.init()
speech.delegate = self
//播放
speech.speak(utterance)
//暂停(在某个位置暂停)
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, willSpeakRangeOfSpeechString characterRange: NSRange, utterance: AVSpeechUtterance) {
//代理获取当前语音播放位置
range = characterRange
}
speech.pauseSpeaking(at: AVSpeechBoundary.init(rawValue: range.location)! )
//继续播放
speech.continueSpeaking()
//停止播放、取消播放
speech.stopSpeaking(at: AVSpeechBoundary.immediate)
//判断当前播放状态
speech.isPaused
speech.isSpeaking
AVSpeechSynthesizerDelegate
//开始播放
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didStart utterance: AVSpeechUtterance) {
}
//取消播放、停止播放
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didCancel utterance: AVSpeechUtterance) {
}
//暂停播放
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didPause utterance: AVSpeechUtterance) {
}
//继续播放
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didContinue utterance: AVSpeechUtterance) {
}
//结束播放
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) {
}
//播放轮询，获取当前播放位置
func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, willSpeakRangeOfSpeechString characterRange: NSRange, utterance: AVSpeechUtterance) {
}
AVSpeechUtterance（语音内容对象）
//根据文本初始化
let utterance = AVSpeechUtterance.init(string: "你好，我是语音播放器")
//播放速率（// 数值在 AVSpeechUtteranceMinimumSpeechRate 和 AVSpeechUtteranceMaximumSpeechRate 区间）
utterance.rate = 0.4
//播放语言
utterance.voice = AVSpeechSynthesisVoice.init(language: "zh-CN")
//播放前的过渡时间
utterance.preUtteranceDelay = 0.5
//播放结束的过渡时间
utterance.postUtteranceDelay = 0.5
AVSpeechSynthesisVoice（语音语言）
AVSpeechSynthesisVoice.init(language: "zh-CN")
- Arabic (ar-SA)
- Chinese (zh-CN, zh-HK, zh-TW)
- Czech (cs-CZ)
- Danish (da-DK)
- Dutch (nl-BE, nl-NL)
- English (en-AU, en-GB, en-IE, en-US, en-ZA)
- Finnish (fi-FI)
- French (fr-CA, fr-FR)
- German (de-DE)
- Greek (el-GR)
- Hebrew (he-IL)
- Hindi (hi-IN)
- Hungarian (hu-HU)
- Indonesian (id-ID)
- Italian (it-IT)
- Japanese (ja-JP)
- Korean (ko-KR)
- Norwegian (no-NO)
- Polish (pl-PL)
- Portuguese (pt-BR, pt-PT)
- Romanian (ro-RO)
- Russian (ru-RU)
- Slovak (sk-SK)
- Spanish (es-ES, es-MX)
- Swedish (sv-SE)
- Thai (th-TH)
- Turkish (tr-TR)
参考链接：AVSpeechSynthesizer
