非常感謝大家利用自己寶貴的時(shí)間來(lái)閱讀我的文章 , ?上一篇文章寫(xiě)了Epub的加密一個(gè)實(shí)現(xiàn)方式，《ios Epub加密及解密閱讀的一種實(shí)現(xiàn)方式》，今天這篇文章主要說(shuō)一下電子書(shū)的語(yǔ)音閱讀叹洲，這個(gè)功能也基本上是閱讀器的標(biāo)配了离福。希望這篇文章能給你的開(kāi)發(fā)過(guò)程帶來(lái)一些幫助爬骤。喜歡的可以關(guān)注一下我的簡(jiǎn)書(shū)醋奠、我的博客 ??

demo下載地址ZQReaderDemo

關(guān)于電子書(shū)閱讀這這塊就不說(shuō)了，還是在XDSReader的基礎(chǔ)上修改耳峦，添加了語(yǔ)音閱讀的功能

在網(wǎng)上查了些資料恩静，IOS7.0之后系統(tǒng)添加了文字轉(zhuǎn)語(yǔ)音的API，AVFoundation框架下的AVSpeechSynthesizer類蹲坷，具體使用代碼如下驶乾，也可參考ZQReaderDemo中的ZQAVSpeechTool

//初始化語(yǔ)音合成器??

_avSpeaker?=?[[AVSpeechSynthesizer?alloc]?init];??

_avSpeaker.delegate?=?self;??

//初始化要說(shuō)出的內(nèi)容??

AVSpeechUtterance?*utterance?=?[[AVSpeechUtterance?alloc]?initWithString:_paragraphs[_currentParagraphs]];??

//設(shè)置語(yǔ)速,語(yǔ)速介于AVSpeechUtteranceMaximumSpeechRate和AVSpeechUtteranceMinimumSpeechRate之間??

//AVSpeechUtteranceMaximumSpeechRate??

//AVSpeechUtteranceMinimumSpeechRate??

//AVSpeechUtteranceDefaultSpeechRate??

utterance.rate?=?_rate;??

//設(shè)置音高,[0.5?-?2]?默認(rèn)?=?1??

//AVSpeechUtteranceMaximumSpeechRate??

//AVSpeechUtteranceMinimumSpeechRate??

//AVSpeechUtteranceDefaultSpeechRate??

utterance.pitchMultiplier?=?1;??

//設(shè)置音量,[0-1]?默認(rèn)?=?1??

utterance.volume?=?1;??

//讀一段前的停頓時(shí)間??

utterance.preUtteranceDelay?=?0.5;??

//讀完一段后的停頓時(shí)間??

utterance.postUtteranceDelay?=?0;??

//設(shè)置聲音,是AVSpeechSynthesisVoice對(duì)象??

//AVSpeechSynthesisVoice定義了一系列的聲音,?主要是不同的語(yǔ)言和地區(qū).??

//voiceWithLanguage:?根據(jù)制定的語(yǔ)言,?獲得一個(gè)聲音.??

//speechVoices:?獲得當(dāng)前設(shè)備支持的聲音??

//currentLanguageCode:?獲得當(dāng)前聲音的語(yǔ)言字符串,?比如”ZH-cn”??

//language:?獲得當(dāng)前的語(yǔ)言??

//通過(guò)特定的語(yǔ)言獲得聲音??

AVSpeechSynthesisVoice?*voice?=?[AVSpeechSynthesisVoice?voiceWithLanguage:@"zh-CN"];??

//通過(guò)voicce標(biāo)示獲得聲音??

//AVSpeechSynthesisVoice?*voice?=?[AVSpeechSynthesisVoice?voiceWithIdentifier:AVSpeechSynthesisVoiceIdentifierAlex];??

utterance.voice?=?voice;??

//開(kāi)始朗讀??

[_avSpeaker?speakUtterance:utterance];??

既然語(yǔ)音轉(zhuǎn)文字實(shí)現(xiàn)方法找到了，那么剩下的都是邏輯上的問(wèn)題了循签，最后整理了一下實(shí)現(xiàn)思路级乐，用戶在閱讀菜單上點(diǎn)擊語(yǔ)音按鈕，開(kāi)始語(yǔ)音閱讀當(dāng)前頁(yè)內(nèi)容县匠，首先取出當(dāng)前頁(yè)的所有文本唇牧，當(dāng)前頁(yè)讀完跳轉(zhuǎn)下一頁(yè)繼續(xù)閱讀，后考慮到高亮問(wèn)題聚唐，又把每一頁(yè)的文本拆分成段落進(jìn)行閱讀，當(dāng)讀完一段開(kāi)始讀下一段腔召，當(dāng)前頁(yè)讀完就繼續(xù)讀下一頁(yè)杆查，當(dāng)前章讀完就讀下一章，整體思路想好了就開(kāi)整臀蛛。

1亲桦、創(chuàng)建了一個(gè)單例工具類ZQAVSpeechTool崖蜜，代碼如下

.h

#import???

@interface?ZQAVSpeechTool?:?NSObject??

+(instancetype)shareSpeechTool;??

//開(kāi)始朗讀??

-?(void)speechTextWith:(NSString?*)text;??

//暫停朗讀??

-?(void)pauseSpeech;??

//繼續(xù)朗讀??

-?(void)continueSpeech;??

//結(jié)束朗讀??

-?(void)StopSpeech;??

//切換語(yǔ)速??

-?(void)changeRate:(CGFloat)rate;??

@end??

.m

#import?"ZQAVSpeechTool.h"??

#import???

@interface?ZQAVSpeechTool?()??

@property?(nonatomic?,strong)AVSpeechSynthesizer?*avSpeaker;??

@property?(nonatomic?,strong)NSArray?*paragraphs;??

@property?(nonatomic?,assign)NSInteger?currentParagraphs;??

@property?(nonatomic?,assign)CGFloat?rate;??

@end??

@implementation?ZQAVSpeechTool??

//?單例??

+(instancetype)shareSpeechTool?{??

static?ZQAVSpeechTool?*instance;??

static?dispatch_once_t?onceToken;??

????dispatch_once(&onceToken,?^{??

instance?=?[[ZQAVSpeechTool?alloc]init];??

????});??

return?instance;??

}??

-?(void)speechTextWith:(NSString?*)text??

{??

if?(!(text.length>0))?{??

return;??

????}??

if?(_avSpeaker)?{??

//把每一頁(yè)文字拆分成段??

_paragraphs?=[text?componentsSeparatedByString:@"\n"];??

_currentParagraphs?=0;??

[self?speechParagraphWith:_paragraphs[_currentParagraphs]];??

}else??

????{??

//初次閱讀??

NSUserDefaults?*useDef?=?[NSUserDefaults?standardUserDefaults];??

_rate?=?[useDef?floatForKey:@"speechRate"];??

if?(!_rate)?{??

_rate?=0.5;??

????????}??

_paragraphs?=[text?componentsSeparatedByString:@"\n"];??

_currentParagraphs?=0;??

[[NSNotificationCenter?defaultCenter]?postNotificationName:@"speechParagraph"?object:_paragraphs[_currentParagraphs]];??

//初始化語(yǔ)音合成器??

_avSpeaker?=?[[AVSpeechSynthesizer?alloc]?init];??

_avSpeaker.delegate?=?self;??

//初始化要說(shuō)出的內(nèi)容??

AVSpeechUtterance?*utterance?=?[[AVSpeechUtterance?alloc]?initWithString:_paragraphs[_currentParagraphs]];??

//設(shè)置語(yǔ)速,語(yǔ)速介于AVSpeechUtteranceMaximumSpeechRate和AVSpeechUtteranceMinimumSpeechRate之間??

//AVSpeechUtteranceMaximumSpeechRate??

//AVSpeechUtteranceMinimumSpeechRate??

//AVSpeechUtteranceDefaultSpeechRate??

utterance.rate?=?_rate;??

//設(shè)置音高,[0.5?-?2]?默認(rèn)?=?1??

//AVSpeechUtteranceMaximumSpeechRate??

//AVSpeechUtteranceMinimumSpeechRate??

//AVSpeechUtteranceDefaultSpeechRate??

utterance.pitchMultiplier?=?1;??

//設(shè)置音量,[0-1]?默認(rèn)?=?1??

utterance.volume?=?1;??

//讀一段前的停頓時(shí)間??

utterance.preUtteranceDelay?=?0.5;??

//讀完一段后的停頓時(shí)間??

utterance.postUtteranceDelay?=?0;??

//設(shè)置聲音,是AVSpeechSynthesisVoice對(duì)象??

//AVSpeechSynthesisVoice定義了一系列的聲音,?主要是不同的語(yǔ)言和地區(qū).??

//voiceWithLanguage:?根據(jù)制定的語(yǔ)言,?獲得一個(gè)聲音.??

//speechVoices:?獲得當(dāng)前設(shè)備支持的聲音??

//currentLanguageCode:?獲得當(dāng)前聲音的語(yǔ)言字符串,?比如”ZH-cn”??

//language:?獲得當(dāng)前的語(yǔ)言??

//通過(guò)特定的語(yǔ)言獲得聲音??

AVSpeechSynthesisVoice?*voice?=?[AVSpeechSynthesisVoice?voiceWithLanguage:@"zh-CN"];??

//通過(guò)voicce標(biāo)示獲得聲音??

//AVSpeechSynthesisVoice?*voice?=?[AVSpeechSynthesisVoice?voiceWithIdentifier:AVSpeechSynthesisVoiceIdentifierAlex];??

utterance.voice?=?voice;??

//開(kāi)始朗讀??

[_avSpeaker?speakUtterance:utterance];??

????}??

}??

-?(void)speechParagraphWith:(NSString?*)Paragraph??

{??

[[NSNotificationCenter?defaultCenter]?postNotificationName:@"speechParagraph"?object:Paragraph];??

AVSpeechUtterance?*utterance?=?[AVSpeechUtterance?speechUtteranceWithString:Paragraph];??

utterance.rate?=?_rate;??

[_avSpeaker?speakUtterance:utterance];??

}??

//切換語(yǔ)速??

-?(void)changeRate:(CGFloat)rate??

{??

????_rate?=?rate;??

//??

[_avSpeaker?stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];????//初始化語(yǔ)音合成器??

//????_avSpeaker?=?[[AVSpeechSynthesizer?alloc]?init];??

//????_avSpeaker.delegate?=?self;??

AVSpeechUtterance?*utterance?=?[AVSpeechUtterance?speechUtteranceWithString:_paragraphs[_currentParagraphs]];??

utterance.rate?=?rate;??

utterance.pitchMultiplier?=?1;??

utterance.volume?=?1;??

utterance.preUtteranceDelay?=?0.5;??

utterance.postUtteranceDelay?=?0;??

[_avSpeaker?speakUtterance:utterance];??

NSUserDefaults?*useDef?=?[NSUserDefaults?standardUserDefaults];??

[useDef?setFloat:rate?forKey:@"speechRate"];??

[useDef?synchronize];??

}??

-?(void)pauseSpeech??

{??

//暫停朗讀??

//AVSpeechBoundaryImmediate?立即停止??

//AVSpeechBoundaryWord????當(dāng)前詞結(jié)束后停止??

[_avSpeaker?pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];??

}??

-?(void)continueSpeech??

{??

[_avSpeaker?continueSpeaking];??

}??

-?(void)StopSpeech??

{??

//AVSpeechBoundaryImmediate?立即停止??

//AVSpeechBoundaryWord????當(dāng)前詞結(jié)束后停止??

[_avSpeaker?stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];??

_avSpeaker?=?nil;??

[XDSReadManager?sharedManager].speeching?=?NO;??

[[NSNotificationCenter?defaultCenter]?postNotificationName:@"speechDidStop"?object:nil];??

}??

#pragma?mark?-??

#pragma?mark?-?AVSpeechSynthesizerDelegate??

//已經(jīng)開(kāi)始??

-?(void)speechSynthesizer:(AVSpeechSynthesizer?*)synthesizer?didStartSpeechUtterance:(AVSpeechUtterance?*)utterance{??

}??

//已經(jīng)說(shuō)完??

-?(void)speechSynthesizer:(AVSpeechSynthesizer?*)synthesizer?didFinishSpeechUtterance:(AVSpeechUtterance?*)utterance{??

_currentParagraphs+=1;??

if?(_currentParagraphs<_paragraphs.count)?{??

//讀下一段??

[self?speechParagraphWith:_paragraphs[_currentParagraphs]];??

}else{??

NSInteger?currentPage?=?CURRENT_RECORD.currentPage;??

NSInteger?currentChapter?=?CURRENT_RECORD.currentChapter;??

if?(currentPage?<?CURRENT_RECORD.totalPage?-?1)?{??

//下一頁(yè)??

currentPage?+=1;??

}else??

????{??

if?(currentChapter?<?CURRENT_RECORD.totalChapters?-?1)?{??

//下一章??

currentChapter?+=1;??

currentPage?=0;??

}else??

????????{??

//全書(shū)讀完??

[self?StopSpeech];??

return;??

????????}??

????}??

[[XDSReadManager?sharedManager]?readViewJumpToChapter:currentChapter?page:currentPage];??

NSString?*content?=?CURRENT_RECORD.chapterModel.pageStrings[currentPage];??

[self?speechTextWith:content];??

????}??

}??

//已經(jīng)暫停??

-?(void)speechSynthesizer:(AVSpeechSynthesizer?*)synthesizer?didPauseSpeechUtterance:(AVSpeechUtterance?*)utterance{??

}??

//已經(jīng)繼續(xù)說(shuō)話??

-?(void)speechSynthesizer:(AVSpeechSynthesizer?*)synthesizer?didContinueSpeechUtterance:(AVSpeechUtterance?*)utterance{??

}??

//已經(jīng)取消說(shuō)話??

-?(void)speechSynthesizer:(AVSpeechSynthesizer?*)synthesizer?didCancelSpeechUtterance:(AVSpeechUtterance?*)utterance{??

}??

//將要說(shuō)某段話??

-?(void)speechSynthesizer:(AVSpeechSynthesizer?*)synthesizer?willSpeakRangeOfSpeechString:(NSRange)characterRange?utterance:(AVSpeechUtterance?*)utterance{??

//????DebugLog(@"%@",utterance.speechString);??

}??

@end??

2、為XDSReadManager添加開(kāi)始語(yǔ)音閱讀的方法客峭，并添加一個(gè)用于判斷當(dāng)前閱讀狀態(tài)的屬性

-?(void)begainSpeech;??

@property?(nonatomic?,assign)BOOL?speeching;??

方法的實(shí)現(xiàn)

//開(kāi)始語(yǔ)音閱讀??

-?(void)begainSpeech??

{??

//取出當(dāng)前頁(yè)文字內(nèi)容??

XDSChapterModel?*currentChapterModel?=?_bookModel.record.chapterModel;??

NSInteger?currentPage?=?_bookModel.record.currentPage;??

NSString?*content?=?currentChapterModel.pageStrings[currentPage];??

//開(kāi)始朗讀本頁(yè)文字??

[[ZQAVSpeechTool?shareSpeechTool]?speechTextWith:content];??

self.speeching?=?YES;??

}??

3豫领、在彈出菜單時(shí)判斷是否正在朗讀，是則彈出語(yǔ)音閱讀菜單ZQSpeechMenuView,因?yàn)锳VSpeechSynthesizer只有女聲舔琅，所以菜單只是加了調(diào)節(jié)語(yǔ)速和暫停/播放等恐、退出的功能，沒(méi)有添加切換男女聲的功能

主要功能實(shí)現(xiàn)

//暫停/播放??

-?(void)pauseBtnClick:(UIButton?*)sender??

{??

if?(_pauseBtn.selected)?{??

[[ZQAVSpeechTool?shareSpeechTool]?continueSpeech];??

}else{??

[[ZQAVSpeechTool?shareSpeechTool]?pauseSpeech];??

????}??

_pauseBtn.selected?=?!_pauseBtn.selected;??

}??

//退出??

-?(void)stopBtnClick??

{??

_pauseBtn.selected?=?NO;??

[[ZQAVSpeechTool?shareSpeechTool]?StopSpeech];??

[self?removeFromSuperview];??

}??

//切換語(yǔ)速??

-?(void)sliderValueChanged:(UISlider?*)slider{??

[[ZQAVSpeechTool?shareSpeechTool]?changeRate:slider.value];??

_pauseBtn.selected?=?NO;??

}??

4备蚓、高亮正在閱讀段落

-?(void)highlightTextWith:(NSString?*)text{??

//移除上一段背景色??

if?(_currentRange.length>0)?{??

[_readAttributedContent?removeAttribute:NSBackgroundColorAttributeName?range:_currentRange];??

????}??

//設(shè)置當(dāng)前朗讀段落背景色??

NSRange?range?=?[_content?rangeOfString:text];??

????_currentRange?=?range;??

[_readAttributedContent?addAttribute:NSBackgroundColorAttributeName?value:RGB(150,?220,?240)?range:range];??

self.readAttributedContent?=?_readAttributedContent;??

[self?reloadView];??

}??

大工搞成课蔬，具體的實(shí)現(xiàn)邏輯及代碼見(jiàn)ZQReaderDemo，語(yǔ)音菜單界面約束使用的SDAutoLayout郊尝，可以根據(jù)自己習(xí)慣進(jìn)行更改二跋。