导入框架：

  import <AVFoundation/AVFoundation.h>

创建

   @interface ViewController ()<AVSpeechSynthesizerDelegate>
  {
      AVSpeechSynthesizer * av;
  }

添加按钮

/语言播放
UIButton*button=[UIButton buttonWithType:UIButtonTypeCustom];

button.frame=CGRectMake(100,100,100,50);

[button setTitle:@"讲"forState:UIControlStateNormal];

[button setTitle:@"停"forState:UIControlStateSelected];

[button setTitleColor:[UIColor blueColor]forState:UIControlStateNormal];

button.backgroundColor=[UIColor grayColor];

button.showsTouchWhenHighlighted=YES;

[button addTarget:self action:@selector(start:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];

设置代理并且实现

  -(void)start:(UIButton*)sender{
if(sender.selected==NO) {
    if([av isPaused]) {
        //如果暂停则恢复，会从暂停的地方继续
        [av continueSpeaking];
        sender.selected=!sender.selected;
    }else{
        //初始化对象
        av= [[AVSpeechSynthesizer alloc]init];
        av.delegate=self;//代理
        AVSpeechUtterance*utterance = [[AVSpeechUtterance alloc]initWithString:@"英语文章 How To Cover Your Tracks On The Internet2008-06-25 所属栏目:Security Website Security - Creating a Bulletproof Site in 5 Easy Steps 2008-06"];//需要转换的文字
        
        utterance.rate=0.5;// 设置语速，范围0-1，注意0最慢，1最快;
        AVSpeechSynthesisVoice*voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];//设置发音，这是中文普通话
        utterance.voice= voice;
        [av speakUtterance:utterance];//开始
        sender.selected=!sender.selected;
                }
}else{
    [av pauseSpeakingAtBoundary:AVSpeechBoundaryWord];//暂停
    sender.selected=!sender.selected;
}
  }
  - (void)speechSynthesizer:(AVSpeechSynthesizer*)synthesizer didStartSpeechUtterance:(AVSpeechUtterance*)utterance{
      NSLog(@"---开始播放");
  }
  - (void)speechSynthesizer:(AVSpeechSynthesizer*)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance*)utterance{
      NSLog(@"---完成播放");
  }
  - (void)speechSynthesizer:(AVSpeechSynthesizer*)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance*)utterance{
      NSLog(@"---播放中止");
  }
  - (void)speechSynthesizer:(AVSpeechSynthesizer*)synthesizer didContinueSpeechUtterance:(AVSpeechUtterance*)utterance{
      NSLog(@"---恢复播放");
  }
    - (void)speechSynthesizer:(AVSpeechSynthesizer*)synthesizer     didCancelSpeechUtterance:(AVSpeechUtterance*)utterance{
      NSLog(@"---播放取消");
  }