iOS用AVSpeechSynthesizer合成语音

导入AVFoundation框架，并引用#import <AVfoundation/AVSpeechSynthesis.h>

代码部分如下：

    AVSpeechUtterance *utterance = [AVSpeechUtterancespeechUtteranceWithString:@"你想要合成的语音内容"];

    AVSpeechSynthesisVoice *voice = [AVSpeechSynthesisVoicevoiceWithLanguage:@"zh-CN"];//发音类型

    utterance.voice = voice;

    NSLog(@"%@",[AVSpeechSynthesisVoicespeechVoices]);//打印所有的发音类型

    utterance.rate *=0.1;//语速

    AVSpeechSynthesizer *synth = [[AVSpeechSynthesizeralloc]init];

    [synthspeakUtterance:utterance];

    //关闭播报语音

    BOOL speakStop = [synth stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];

    if (!speakStop) {

        [synth stopSpeakingAtBoundary:AVSpeechBoundaryWord];

    }

    //检测是否关闭

    int isStop;

    if ([synth isSpeaking]==YES) {

        isStop = 1;

    }else{

        isStop = 0;

    }