作用：

用文本轉(zhuǎn)化成語音。例如輸入文本“hello world"，則系統(tǒng)語音讀出來

前提引入

#import <AVFoundation/AVFoundation.h>

/**
 核心代碼
 */
-(void)func_textToVoice
{
    NSLog(@"開始轉(zhuǎn)化語音");
    
    //要轉(zhuǎn)化的文本
    NSString * text = self.array_text[0];
    
    //語言配置類
    AVSpeechUtterance * utterance = [[AVSpeechUtterance alloc]initWithString:text];
    utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CH"];
    //TODO...
    
    //語音合成器
    [self.synthesizer speakUtterance:utterance];
}

批量轉(zhuǎn)化語音

/**
 多條文本轉(zhuǎn)換語音
 */
-(void)func_moreTextsToVoice
{
    self.array_text = @[
                        @"除夕更闌人不睡，厭禳鈍滯迎新歲；",
                        @"小兒呼叫走長街，云有癡呆召人買。",
                        @"二物于人誰獨(dú)無？就中吳儂仍有余；",
                        @"巷南巷北賣不得，相逢大笑相揶揄。",
                        @"櫟翁塊坐重簾下，獨(dú)要買添令問價(jià)。",
                        @"兒云翁買不須錢，奉賒癡呆千百年。",
                        ];
    for(int i=0;i<self.array_text.count;i++)
    {
        AVSpeechUtterance * utterance = [[AVSpeechUtterance alloc]initWithString:array_text[i]];
        utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];
//        utterance.postUtteranceDelay = 0.1f;
//        utterance.preUtteranceDelay = 0.5f;
        utterance.pitchMultiplier = 0.8f;
        //TODO...

        [self.synthesizer speakUtterance:utterance];
    }

}

設(shè)置語言屬性，如音調(diào)、前后延遲間隔、語速、音量等

/**
 個(gè)性化配置語音
 */
-(void)func_configVoice
{
    //要轉(zhuǎn)化的文本
    NSString * text = self.array_text[0];
    
    //語言配置類
    AVSpeechUtterance * utterance = [[AVSpeechUtterance alloc]initWithString:text];
    //定制語種
    utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CH"];
    //定制基線音調(diào)，范圍0.5～2.0，默認(rèn)1.0
    utterance.pitchMultiplier = 1.0;
    //定制語速,建議用常量來控制范圍 AVSpeechUtteranceMinimumSpeechRate AVSpeechUtteranceMaximumSpeechRate AVSpeechUtteranceDefaultSpeechRate.
    utterance.rate = AVSpeechUtteranceDefaultSpeechRate;
    //定制音量
    utterance.volume = 1.0;
    //該語音播放完后延遲時(shí)間再播放下一個(gè)
    utterance.postUtteranceDelay = 0.5f;
    //等待延遲時(shí)間再進(jìn)行播放
    utterance.preUtteranceDelay = 0.1;
    //TODO...
    
    //語音合成器
    [self.synthesizer speakUtterance:utterance];
}

語音合成事件協(xié)議

#pragma AVSpeechSynthesizerDelegate
-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance
{
    NSLog(@"語音合成開始");
}
-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance *)utterance
{
    NSLog(@"語音合成暫停");
}
-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance
{
    NSLog(@"語音合成取消");
}
-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance
{
    NSLog(@"語音合成完成");
}
-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance
{
    NSLog(@"語音合成即將播放第%lu個(gè)字長度為%lu",(unsigned long)characterRange.location,(unsigned long)characterRange.length);
}

暫停

/**
 暫停語音播放
 */
-(void)func_pauseVoice
{
    if(self.synthesizer.speaking)
    {
        [self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];//立即停止
        [self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryWord];//讀完停止
    }
}

繼續(xù)

/**
 繼續(xù)播放
 */
-(void)func_continueSpeaking
{
    if(self.synthesizer.paused)
    {
        [self.synthesizer continueSpeaking];
    }
}

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