iOS文字转语音（语音朗读）

1.第一步导入framework

2.导入头文件

#import <AVFoundation/AVSpeechSynthesis.h>

3. 设置代理并写下面方法（注：代理方法用不到可以不用遵循代理和代理方法）

//遵循代理 AVSpeechSynthesizerDelegate
// 文本读语音方法 stra是要读的文本
- (void)boFangTextWithString:(NSString *)stra
{
    //初始化语音合成器
    _avSpeaker = [[AVSpeechSynthesizer alloc] init];
    _avSpeaker.delegate = self;
    //初始化要说出的内容
    AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc] initWithString:stra];
    //设置语速,语速介于AVSpeechUtteranceMaximumSpeechRate和AVSpeechUtteranceMinimumSpeechRate之间
    //AVSpeechUtteranceMaximumSpeechRate
    //AVSpeechUtteranceMinimumSpeechRate
    //AVSpeechUtteranceDefaultSpeechRate
    utterance.rate = 0.5;
    
    //设置音高,[0.5 - 2] 默认 = 1
    //AVSpeechUtteranceMaximumSpeechRate
    //AVSpeechUtteranceMinimumSpeechRate
    //AVSpeechUtteranceDefaultSpeechRate
    utterance.pitchMultiplier = 1;
    
    //设置音量,[0-1] 默认 = 1
    utterance.volume = 1;
    
    //读一段前的停顿时间
    utterance.preUtteranceDelay = 1;
    //读完一段后的停顿时间
    utterance.postUtteranceDelay = 1;
    
    //设置声音,是AVSpeechSynthesisVoice对象
    //AVSpeechSynthesisVoice定义了一系列的声音, 主要是不同的语言和地区.
    //voiceWithLanguage: 根据制定的语言, 获得一个声音.
    //speechVoices: 获得当前设备支持的声音
    //currentLanguageCode: 获得当前声音的语言字符串, 比如”ZH-cn”
    //language: 获得当前的语言
    //通过特定的语言获得声音
    AVSpeechSynthesisVoice *voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];
    //通过voicce标示获得声音
    //AVSpeechSynthesisVoice *voice = [AVSpeechSynthesisVoice voiceWithIdentifier:AVSpeechSynthesisVoiceIdentifierAlex];
    utterance.voice = voice;
    //开始朗读
    [_avSpeaker speakUtterance:utterance];
}
#pragma mark - AVSpeechSynthesizerDelegate
//已经开始
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance{
    
    
}
//已经说完
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance{
    
    //如果朗读要循环朗读，可以在这里再次调用朗读方法
    //[_avSpeaker speakUtterance:utterance];
}
//已经暂停
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance *)utterance{
    
}
//已经继续说话
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didContinueSpeechUtterance:(AVSpeechUtterance *)utterance{
    
}
//已经取消说话
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance{
    
}
//将要说某段话
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance{
    
}

以下代码只是选择语言用

[AVSpeechSynthesisVoice 0x978a0b0] Language: th-TH",

"[AVSpeechSynthesisVoice 0x977a450] Language: pt-BR",

"[AVSpeechSynthesisVoice 0x977a480] Language: sk-SK",

"[AVSpeechSynthesisVoice 0x978ad50] Language: fr-CA",

"[AVSpeechSynthesisVoice 0x978ada0] Language: ro-RO",

"[AVSpeechSynthesisVoice 0x97823f0] Language: no-NO",

"[AVSpeechSynthesisVoice 0x978e7b0] Language: fi-FI",

"[AVSpeechSynthesisVoice 0x978af50] Language: pl-PL",

"[AVSpeechSynthesisVoice 0x978afa0] Language: de-DE",

"[AVSpeechSynthesisVoice 0x978e390] Language: nl-NL",

"[AVSpeechSynthesisVoice 0x978b030] Language: id-ID",

"[AVSpeechSynthesisVoice 0x978b080] Language: tr-TR",

"[AVSpeechSynthesisVoice 0x978b0d0] Language: it-IT",

"[AVSpeechSynthesisVoice 0x978b120] Language: pt-PT",

"[AVSpeechSynthesisVoice 0x978b170] Language: fr-FR",

"[AVSpeechSynthesisVoice 0x978b1c0] Language: ru-RU",

"[AVSpeechSynthesisVoice 0x978b210] Language: es-MX",

"[AVSpeechSynthesisVoice 0x978b2d0] Language: zh-HK",中文(香港)粤语

"[AVSpeechSynthesisVoice 0x978b320] Language: sv-SE",

"[AVSpeechSynthesisVoice 0x978b010] Language: hu-HU",

"[AVSpeechSynthesisVoice 0x978b440] Language: zh-TW",中文(台湾)

"[AVSpeechSynthesisVoice 0x978b490] Language: es-ES",

"[AVSpeechSynthesisVoice 0x978b4e0] Language: zh-CN",中文(普通话)

"[AVSpeechSynthesisVoice 0x978b530] Language: nl-BE",

"[AVSpeechSynthesisVoice 0x978b580] Language: en-GB",英语(英国)

"[AVSpeechSynthesisVoice 0x978b5d0] Language: ar-SA",

"[AVSpeechSynthesisVoice 0x978b620] Language: ko-KR",

"[AVSpeechSynthesisVoice 0x978b670] Language: cs-CZ",

"[AVSpeechSynthesisVoice 0x978b6c0] Language: en-ZA",

"[AVSpeechSynthesisVoice 0x978aed0] Language: en-AU",

"[AVSpeechSynthesisVoice 0x978af20] Language: da-DK",

"[AVSpeechSynthesisVoice 0x978b810] Language: en-US",英语(美国)

"[AVSpeechSynthesisVoice 0x978b860] Language: en-IE",

"[AVSpeechSynthesisVoice 0x978b8b0] Language: hi-IN",

"[AVSpeechSynthesisVoice 0x978b900] Language: el-GR",

"[AVSpeechSynthesisVoice 0x978b950] Language: ja-JP"

iOS文字转语音（语音朗读）

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