iOS使用讯飞语音-语音识别(最新版）

引言

去年在一家公司实习，接触了一点人工智能。既然接触人工智能，那么语音识别、语音合成、人脸识别等等都是必不可少的。
本来已经是离开iOS开发这条路了，还剩下毕业设计要做，所以这段时间最后一次回来接触iOS了。
以后，估计没什么机会再接触iOS，都往着机器学习、深度学习方向去了。
废话不说了，记录一下，如何接入讯飞语音。

步骤

一、官网下载SDK
去讯飞语音开放平台下载iOS的SDK
讯飞语音开放平台

当然，你需要创建一个应用，然后才能下载iOS的SDK，应用选择语音识别的类型。(这里只是演示语音识别类型的接入，其余语音合成、人脸识别等等自己可以试试)

二、工程导入相应的包和文件

这里仅演示在线语音识别，离线的请按照文档来操作
iOS讯飞操作文档

三、设置系统参数

用户隐私权限配置

iOS 10发布以来，苹果为了用户信息安全，加入隐私权限设置机制，让用户来选择是否允许。
隐私权限配置可在info.plist 新增相关privacy字段，MSC SDK中需要用到的权限主要包括麦克风权限、联系人权限和地理位置权限：

<key>NSMicrophoneUsageDescription</key>
<string></string>
<key>NSLocationUsageDescription</key>
<string></string>
<key>NSLocationAlwaysUsageDescription</key>
<string></string>
<key>NSContactsUsageDescription</key>
<string></string>

四、代码初始化

    //Appid是应用的身份信息，具有唯一性，初始化时必须要传入Appid。NSString *initString = [[NSString alloc] initWithFormat:@"appid=%@",xunfeiID];[IFlySpeechUtility createUtility:initString];

ID就是对应图片的ID。
建议把上面这段代码放在AppDelegate.m中

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

方法里面初始化。

PS：要导入头文件`#import "IFlyMSC/IFlyMSC.h"`这个头文件，没有智能提示，文档里面我好像也没看到，还有我去年写的时候有备份(下面我会狠狠吐槽讯飞)

示例代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {//Appid是应用的身份信息，具有唯一性，初始化时必须要传入Appid。NSString *initString = [[NSString alloc] initWithFormat:@"appid=%@",xunfeiID];[IFlySpeechUtility createUtility:initString];
}

//
//  MMusicViewController.m
//  MusicPlayer
//
//  Created by HZhenF on 2018/2/18.
//  Copyright © 2018年 LiuZhu. All rights reserved.
//#import "MMusicViewController.h"
#import "IFlyMSC/IFlyMSC.h"
#import "ISRDataHelper.h"@interface MMusicViewController ()<IFlySpeechRecognizerDelegate>
//不带界面的识别对象
@property (nonatomic, strong) IFlySpeechRecognizer *iFlySpeechRecognizer;
/**生成的字符*/
@property(nonatomic,strong) NSString *resultStringFromJson;
/**当前是否可以进行录音*/
@property(nonatomic,assign) BOOL isStartRecord;
/**是否已经开始播放*/
@property(nonatomic,assign) BOOL ishadStart;@end@implementation MMusicViewController#pragma mark - 懒加载-(IFlySpeechRecognizer *)iFlySpeechRecognizer
{if (!_iFlySpeechRecognizer) {//创建语音识别对象_iFlySpeechRecognizer = [IFlySpeechRecognizer sharedInstance];//设置识别参数//设置为听写模式[_iFlySpeechRecognizer setParameter:@"iat" forKey:[IFlySpeechConstant IFLY_DOMAIN]];//asr_audio_path 是录音文件名，设置 value 为 nil 或者为空取消保存，默认保存目录在 Library/cache 下。[_iFlySpeechRecognizer setParameter:@"iat.pcm" forKey:[IFlySpeechConstant ASR_AUDIO_PATH]];//设置最长录音时间:60秒[_iFlySpeechRecognizer setParameter:@"-1" forKey:[IFlySpeechConstant SPEECH_TIMEOUT]];//设置语音后端点:后端点静音检测时间，即用户停止说话多长时间内即认为不再输入， 自动停止录音[_iFlySpeechRecognizer setParameter:@"10000" forKey:[IFlySpeechConstant VAD_EOS]];//设置语音前端点:静音超时时间，即用户多长时间不说话则当做超时处理[_iFlySpeechRecognizer setParameter:@"5000" forKey:[IFlySpeechConstant VAD_BOS]];//网络等待时间[_iFlySpeechRecognizer setParameter:@"2000" forKey:[IFlySpeechConstant NET_TIMEOUT]];//设置采样率，推荐使用16K[_iFlySpeechRecognizer setParameter:@"16000" forKey:[IFlySpeechConstant SAMPLE_RATE]];//设置语言[_iFlySpeechRecognizer setParameter:@"zh_cn" forKey:[IFlySpeechConstant LANGUAGE]];//设置方言[_iFlySpeechRecognizer setParameter:@"mandarin" forKey:[IFlySpeechConstant ACCENT]];//设置是否返回标点符号[_iFlySpeechRecognizer setParameter:@"0" forKey:[IFlySpeechConstant ASR_PTT]];//设置代理_iFlySpeechRecognizer.delegate = self;}return _iFlySpeechRecognizer;
}#pragma mark - 系统方法- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor = [UIColor whiteColor];self.isStartRecord = YES;//初始化字符串,否则无法拼接self.resultStringFromJson = @"";CGRect btnRect = CGRectMake((ZFScreenW - 100)*0.5, 200, 100, 100);UIButton *btn = [[UIButton alloc] initWithFrame:btnRect];btn.backgroundColor = [UIColor orangeColor];[btn setTitle:@"语音" forState:UIControlStateNormal];[self.view addSubview:btn];UILongPressGestureRecognizer *longpress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressActionFromLongPressBtn:)];longpress.minimumPressDuration = 0.1;[btn addGestureRecognizer:longpress];
}#pragma mark - 自定义方法-(void)longPressActionFromLongPressBtn:(UILongPressGestureRecognizer *)longPress
{
//    NSLog(@"AIAction");CGPoint currentPoint = [longPress locationInView:longPress.view];if (self.isStartRecord) {self.resultStringFromJson = @"";//启动识别服务[self.iFlySpeechRecognizer startListening];self.isStartRecord = NO;self.ishadStart = YES;//开始声音动画
//        [self TipsViewShowWithType:@"start"];}//如果上移的距离大于60,就提示放弃本次录音if (currentPoint.y < -60) {//变成取消发送图片
//        [self TipsViewShowWithType:@"cancel"];self.ishadStart = NO;}else{if (self.ishadStart == NO) {//开始声音动画
//            [self TipsViewShowWithType:@"start"];self.ishadStart = YES;}}if (longPress.state == UIGestureRecognizerStateEnded) {self.isStartRecord = YES;if (currentPoint.y < -60) {[self.iFlySpeechRecognizer cancel];}else{[self.iFlySpeechRecognizer stopListening];}//让声音播放动画消失
//        [self TipsViewShowWithType:@"remove"];}}//IFlySpeechRecognizerDelegate协议实现
//识别结果返回代理
- (void) onResults:(NSArray *) results isLast:(BOOL)isLast{NSMutableString *resultString = [[NSMutableString alloc] init];NSDictionary *dic = results[0];for (NSString *key in dic) {[resultString appendFormat:@"%@",key];}//持续拼接语音内容self.resultStringFromJson = [self.resultStringFromJson stringByAppendingString:[ISRDataHelper stringFromJson:resultString]];NSLog(@"self.resultStringFromJson = %@",self.resultStringFromJson);
}
//识别会话结束返回代理
- (void)onError: (IFlySpeechError *) error{NSLog(@"error = %@",[error description]);
}//停止录音回调
-(void)onEndOfSpeech
{self.isStartRecord = YES;
}//开始录音回调
-(void)onBeginOfSpeech
{//    NSLog(@"onbeginofspeech");
}//音量回调函数
-(void)onVolumeChanged:(int)volume
{}//会话取消回调
-(void)onCancel
{//    NSLog(@"取消本次录音");
}@end

//
//  ISRDataHelper.h
//  HYAIRobotSDK
//
//  Created by HZhenF on 2017/9/7.
//  Copyright © 2017年 GZHYTechnology. All rights reserved.
//#import <Foundation/Foundation.h>@interface ISRDataHelper : NSObject// 解析命令词返回的结果
+ (NSString*)stringFromAsr:(NSString*)params;/**解析JSON数据****/
+ (NSString *)stringFromJson:(NSString*)params;///**解析语法识别返回的结果****/
+ (NSString *)stringFromABNFJson:(NSString*)params;@end

//
//  ISRDataHelper.m
//  HYAIRobotSDK
//
//  Created by HZhenF on 2017/9/7.
//  Copyright © 2017年 GZHYTechnology. All rights reserved.
//#import "ISRDataHelper.h"@implementation ISRDataHelper/**解析命令词返回的结果****/
+ (NSString*)stringFromAsr:(NSString*)params;
{NSMutableString * resultString = [[NSMutableString alloc]init];NSString *inputString = nil;NSArray *array = [params componentsSeparatedByString:@"\n"];for (int  index = 0; index < array.count; index++){NSRange range;NSString *line = [array objectAtIndex:index];NSRange idRange = [line rangeOfString:@"id="];NSRange nameRange = [line rangeOfString:@"name="];NSRange confidenceRange = [line rangeOfString:@"confidence="];NSRange grammarRange = [line rangeOfString:@" grammar="];NSRange inputRange = [line rangeOfString:@"input="];if (confidenceRange.length == 0 || grammarRange.length == 0 || inputRange.length == 0 ){continue;}//check nomatchif (idRange.length!=0) {NSUInteger idPosX = idRange.location + idRange.length;NSUInteger idLength = nameRange.location - idPosX;range = NSMakeRange(idPosX,idLength);NSString *idValue = [[line substringWithRange:range]stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet] ];if ([idValue isEqualToString:@"nomatch"]) {return @"";}}//Get Confidence ValueNSUInteger confidencePosX = confidenceRange.location + confidenceRange.length;NSUInteger confidenceLength = grammarRange.location - confidencePosX;range = NSMakeRange(confidencePosX,confidenceLength);NSString *score = [line substringWithRange:range];NSUInteger inputStringPosX = inputRange.location + inputRange.length;NSUInteger inputStringLength = line.length - inputStringPosX;range = NSMakeRange(inputStringPosX , inputStringLength);inputString = [line substringWithRange:range];[resultString appendFormat:@"%@ 置信度%@\n",inputString, score];}return resultString;}/**解析听写json格式的数据params例如：{"sn":1,"ls":true,"bg":0,"ed":0,"ws":[{"bg":0,"cw":[{"w":"白日","sc":0}]},{"bg":0,"cw":[{"w":"依山","sc":0}]},{"bg":0,"cw":[{"w":"尽","sc":0}]},{"bg":0,"cw":[{"w":"黄河入海流","sc":0}]},{"bg":0,"cw":[{"w":"。","sc":0}]}]}****/
+ (NSString *)stringFromJson:(NSString*)params
{if (params == NULL) {return nil;}NSMutableString *tempStr = [[NSMutableString alloc] init];NSDictionary *resultDic  = [NSJSONSerialization JSONObjectWithData:    //返回的格式必须为utf8的,否则发生未知错误[params dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:nil];if (resultDic!= nil) {NSArray *wordArray = [resultDic objectForKey:@"ws"];for (int i = 0; i < [wordArray count]; i++) {NSDictionary *wsDic = [wordArray objectAtIndex: i];NSArray *cwArray = [wsDic objectForKey:@"cw"];for (int j = 0; j < [cwArray count]; j++) {NSDictionary *wDic = [cwArray objectAtIndex:j];NSString *str = [wDic objectForKey:@"w"];[tempStr appendString: str];}}}return tempStr;
}/**解析语法识别返回的结果****/
+ (NSString *)stringFromABNFJson:(NSString*)params
{if (params == NULL) {return nil;}NSMutableString *tempStr = [[NSMutableString alloc] init];NSDictionary *resultDic  = [NSJSONSerialization JSONObjectWithData:[params dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:nil];NSArray *wordArray = [resultDic objectForKey:@"ws"];for (int i = 0; i < [wordArray count]; i++) {NSDictionary *wsDic = [wordArray objectAtIndex: i];NSArray *cwArray = [wsDic objectForKey:@"cw"];for (int j = 0; j < [cwArray count]; j++) {NSDictionary *wDic = [cwArray objectAtIndex:j];NSString *str = [wDic objectForKey:@"w"];NSString *score = [wDic objectForKey:@"sc"];[tempStr appendString: str];[tempStr appendFormat:@" 置信度:%@",score];[tempStr appendString: @"\n"];}}return tempStr;
}@end

小吐槽

在这里，我要狠狠地吐槽一番讯飞语音开放平台，产品功能怎么样我不说，单单是开发文档的说明我就很想骂人了。以前的开发文档还会有详细的说明，现在SDK也更新了，对应的接口也少了，连Demo也很简单了。但是！能不能别告诉我，我要设置其他的东西，好歹也说明现在不对外开放了。还有，现在下载版的docsets文档，我知道你们的本意是方便iOS开发者导入Document目录下，直接方便开发者查看文档，呵呵，我还不如看以前你们给的文档，要啥有啥。早知如此，我还不如直接去用百度的。本来是想抱着尝试的态度，对你们更新的SDK摸索研究一下，现在，我彻底失望了。虽然是完成了任务，成功使用了语音听写功能，老实说，我太失望了。