YYXC_Student/jiaPei/SDSoundPlayer.m

//
//  SDSoundPlayer.m
//  MapDemo
//
//  Created by apple on 16/5/19.
//  Copyright © 2016年 danson. All rights reserved.

#import "SDSoundPlayer.h"

static SDSoundPlayer *soundplayer = nil;

@interface SDSoundPlayer()<AVSpeechSynthesizerDelegate>
{
    NSString *playString;
}

@property(nonatomic,strong)AVSpeechSynthesizer *avSpeech;//卧槽？不写成属性 代理不回调？

@end

@implementation SDSoundPlayer


+(SDSoundPlayer *)SDSoundPlayerInit
{
    if(soundplayer == nil)
    {
        soundplayer = [[SDSoundPlayer alloc]init];
        [soundplayer setDefaultWithVolume:-1.0 rate:-1.0 pitchMultiplier:-1.0];
    }
    return soundplayer;
}

//播放声音
-(void)play:(NSString *)string
{
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setActive:YES error:nil];
    NSLog(@"AVSpeechSynthesizer-%@。   string-%@",_avSpeech,string);
    if (_avSpeech && _avSpeech.speaking) {//&& ![string containsString:@"您已超速"] && ![playString containsString:@"拍照"] 这个@danson是给实操计时（辽宁没使用该功能）增加的一些限制，但是我@lee在写模拟计时的时候不需要这些限制。
        NSLog(@"zzStop;");
        [_avSpeech stopSpeakingAtBoundary:AVSpeechBoundaryWord];
    }
    
    playString = string;
    
    if(string && string.length > 0){

        if (!_avSpeech) {
            _avSpeech  = [[AVSpeechSynthesizer alloc]init];
            _avSpeech.delegate = self;
        }
        AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc]initWithString:string];//设置语音内容
        utterance.voice  = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];//设置语言
        utterance.rate   = self.rate;  //设置语速
        utterance.volume = self.volume;  //设置音量（0.0~1.0）默认为1.0
        utterance.pitchMultiplier    = self.pitchMultiplier;  //设置语调 (0.5-2.0)
        utterance.postUtteranceDelay = 1; //目的是让语音合成器播放下一语句前有短暂的暂停
        
        [_avSpeech speakUtterance:utterance];
    }
}

//初始化配置
/**
 *  设置播放的声音参数 如果选择默认请传入 -1.0
 *
 *  @param aVolume          音量（0.0~1.0）默认为1.0
 *  @param aRate            语速（0.0~1.0）
 *  @param aPitchMultiplier 语调 (0.5-2.0)
 */
-(void)setDefaultWithVolume:(float)aVolume rate:(CGFloat)aRate pitchMultiplier:(CGFloat)aPitchMultiplier
{
    self.rate   = aRate;
    self.volume = aVolume;
    self.pitchMultiplier = aPitchMultiplier;
    
    if (aRate == -1.0) {
        self.rate = 1;
    }
    if (aVolume == -1.0) {
        self.volume = 1;
    }
    if (aPitchMultiplier == -1.0) {
        self.pitchMultiplier = 1;
    }
}


- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance
{
    NSLog(@"didStart");
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance
{
    NSLog(@"didFinish");
}



@end