iOS 语音播放文字内容--制作简易听书软件(AVSpeechS

源码地址：https://github.com/chenfanfang/CollectionsOfExample

下面先来一张UI布局图

下面附上代码（代码中有详细的注释）

//
//  FFVoicePlayTextController.m
//  CollectionsOfExample
//
//  Created by mac on 16/7/30.
//  Copyright © 2016年 chenfanfang. All rights reserved.
//

#import "FFVoicePlayTextController.h"

//system
#import <AVFoundation/AVFoundation.h>

@interface FFVoicePlayTextController ()<AVSpeechSynthesizerDelegate>

/** 文本输入框 */
@property (weak, nonatomic) IBOutlet UITextView *textView;

/** 语言数组 */
@property (nonatomic, strong) NSArray<AVSpeechSynthesisVoice *> *laungeVoices;

/** 语音合成器 */
@property (nonatomic, strong) AVSpeechSynthesizer *synthesizer;

@end

@implementation FFVoicePlayTextController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.navigationItem.title = @"语音播放文字内容";
    
}

/***********************************懒加载***********************************/
#pragma mark - 懒加载
- (NSArray<AVSpeechSynthesisVoice *> *)laungeVoices {
    if (_laungeVoices == nil) {
        _laungeVoices = @[
                          //美式英语
                          [AVSpeechSynthesisVoice voiceWithLanguage:@"en-US"],
                          //英式英语
                          [AVSpeechSynthesisVoice voiceWithLanguage:@"en-GB"],
                          //中文
                          [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"]
                          ];
    }
    return _laungeVoices;
}

- (AVSpeechSynthesizer *)synthesizer {
    if (_synthesizer == nil) {
        _synthesizer = [[AVSpeechSynthesizer alloc] init];
        _synthesizer.delegate = self;
    }
    return _synthesizer;
}

/***********************************事件处理***********************************/
#pragma mark - 事件处理

/** 语音播放 */
- (IBAction)voiceBtnClick:(UIButton *)sender {
    
    //创建一个会话
    AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc] initWithString:self.textView.text];
    
    //选择语言发音的类别，如果有中文，一定要选择中文，要不然无法播放语音
    utterance.voice = self.laungeVoices[2];
    
    //播放语言的速率，值越大，播放速率越快
    utterance.rate = 0.4f;
    
    //音调  --  为语句指定pitchMultiplier ，可以在播放特定语句时改变声音的音调、pitchMultiplier的允许值一般介于0.5(低音调)和2.0(高音调)之间
    utterance.pitchMultiplier = 0.8f;
    
    //让语音合成器在播放下一句之前有短暂时间的暂停，也可以类似的设置preUtteranceDelay
    utterance.postUtteranceDelay = 0.1f;
    
    //播放语言
    [self.synthesizer speakUtterance:utterance];
    
}

/** 暂停语音播放/回复语音播放 */
- (IBAction)playAndPauseBtnClick:(UIButton *)sender {
    
    if (self.synthesizer.isPaused == YES) { //暂停状态
        //继续播放
        [self.synthesizer continueSpeaking];
    }
    
    else { //现在在播放
        
        //立即暂停播放
        [self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];
    }
}

/** 停止播放语音 */
- (void)stopPlayVoice {
    if (self.synthesizer.isSpeaking) { //正在语音播放
        
        //立即停止播放语音
        [self.synthesizer stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];
    }
}

/**********************AVSpeechSynthesizerDelegate(代理方法)***********************/
#pragma mark - AVSpeechSynthesizerDelegate(代理方法)

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance {
    NSLog(@"开始播放语音的时候调用");
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance {
    NSLog(@"语音播放结束的时候调用");
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance *)utterance {
    NSLog(@"暂停语音播放的时候调用");
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didContinueSpeechUtterance:(AVSpeechUtterance *)utterance {
    NSLog(@"继续播放语音的时候调用");
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance {
    NSLog(@"取消语音播放的时候调用");
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance {
    
    /** 将要播放的语音文字 */
    NSString *willSpeakRangeOfSpeechString = [utterance.speechString substringWithRange:characterRange];
    
    NSLog(@"即将播放的语音文字:%@",willSpeakRangeOfSpeechString);
}

@end

支持的语言语音如下：

"[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",  英式英语 
"[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",  美式英语
"[AVSpeechSynthesisVoice 0x978b860] Language: en-IE",  
"[AVSpeechSynthesisVoice 0x978b8b0] Language: hi-IN",   
"[AVSpeechSynthesisVoice 0x978b900] Language: el-GR",  
"[AVSpeechSynthesisVoice 0x978b950] Language: ja-JP" )