需要导入<AVFoundatian/AVFoundtian.h>

AVSpeechSynthesizer * synthsizer = [[AVSpeechSynthesizer alloc] init];

AVSpeechUtterance * utterance = [[AVSpeechUtterance alloc] initWithString:@"aosika先生"];//需要转换的文本

//设置语言类别（不能被识别，返回值为nil）@"zh-CN"国语@"zh-HK"粤语@"zh-TW"台湾

//self.voiceType = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];

//self.utterance.voice = self.voiceType;

utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];//国家语言

//设置语速快慢 

utterance.rate = 0.4f;//声速

[synthsizer speakUtterance:utterance];

初始化AVSpeechSynthesizer 在初始化 AVSpeechUtterance

开始播报[synthsizer speakUtterance:utterance];

停止播放 [synthesizer  stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];