iOS开发之语音功能实现

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

//创建语音配置,appid必须要传入，仅执行一次则可

NSString *initString = [[NSString alloc] initWithFormat:@"appid=570f3db3"];

//所有服务启动前，需要确保执行createUtility

[IFlySpeechUtility createUtility:initString];

return YES;

}

制作录音文件，使用apple原生API框架。需要添加头文件AVFoundation框架，在程序第一次启用时候会请求是否打开此项功能。另使用科大API只能免费使用在线SDK，调用离线SDK只能用于3个iOS设备使用35天。离线购买价格很贵。

#import "iflyMSC/IFlyMSC.h"

#import "iflyMSC/IFlySpeechConstant.h"

#import "iflyMSC/IFlySpeechRecognizerDelegate.h"

#import "iflyMSC/IFlySpeechRecognizer.h"

@import AVFoundation;

<AVAudioRecorderDelegate>使用代理

@property (nonatomic,strong)IFlySpeechRecognizer *iFlySpeechRecognizer;

@property (nonatomic,strong)AVAudioRecorder *recorder;

@property (nonatomic,strong)AVAudioPlayer *player;

@property (nonatomic,strong)NSTimer *timer;

@property (nonatomic,strong)NSURL *url;

@property (nonatomic,strong)NSMutableDictionary *dict;

@property (nonatomic,strong)UIProgressView *gress;

@property (nonatomic,strong)NSMutableString *text;

@property (weak, nonatomic) IBOutlet UITextField *textField;

AVAudioSession *session = [AVAudioSession sharedInstance];

//单例模式，设置为录音并播放

[session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

[session setActive:YES error:nil];

NSString *str = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];

self.url = [NSURL fileURLWithPath:[str stringByAppendingPathComponent:@"myFirstRecord.caf"]];

设置文件的保存路径

self.gress = [[UIProgressView alloc]initWithProgressViewStyle:UIProgressViewStyleDefault];

self.gress.progress = 0;设置进度条

self.gress.frame = CGRectMake(90, 200, 200, 2);

[self.view addSubview:self.gress];

self.dict = [NSMutableDictionary dictionary];

[self.dict setObject:@(kAudioFormatLinearPCM) forKey:AVFormatIDKey];

[self.dict setObject:@10000 forKey:AVSampleRateKey];

[self.dict setObject:@1 forKey:AVNumberOfChannelsKey];

[self.dict setObject:@8 forKey:AVLinearPCMBitDepthKey];

[self.dict setObject:@(YES) forKey:AVLinearPCMIsFloatKey];

if (!_recorder) {

_recorder = [[AVAudioRecorder alloc]initWithURL:self.url settings:self.dict error:nil];

_recorder.delegate = self;

_recorder.meteringEnabled = YES;

}

if (!_player) {

_player = [[AVAudioPlayer alloc]initWithContentsOfURL:self.url error:nil];

}

[self start];

- (void)start{

_iFlySpeechRecognizer = [IFlySpeechRecognizer sharedInstance]; //设置听写模式

_iFlySpeechRecognizer.delegate = self;

//2.设置听写参数

[_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:@"asrview.pcm" forKey:[IFlySpeechConstant ASR_AUDIO_PATH]];

//3.启动识别服务 [_iFlySpeechRecognizer start];

}

- (NSTimer *)timer{

if (!_timer) {

_timer = [NSTimer scheduledTimerWithTimeInterval:1/20.0 target:self selector:@selector(showProgress:) userInfo:nil repeats:YES];

NSLog(@"nstime");

}

return _timer;

}

- (void)showProgress:(NSTimer*)t{

[self.recorder updateMeters];

float power = [self.recorder averagePowerForChannel:0];//取得第一个通道的音频，注意音频强度范围时-160到0

self.gress.progress = (power+160)/160.0;

}

- (IBAction)recording:(id)sender {

if (![self.recorder isRecording]) {

[self.recorder record];

self.timer.fireDate = [NSDate distantPast];

}

NSLog(@"录音开始!");

}

- (IBAction)pause:(id)sender {

if (![self.recorder isRecording]) {

[self.recorder pause];

self.timer.fireDate = [NSDate distantFuture];

}else{

[self.recorder record];

self.timer.fireDate = [NSDate distantPast];

}

NSLog(@"暂停切换!");

}

- (IBAction)stop:(id)sender {

[self.recorder stop];

NSLog(@"录音结束!");

self.timer.fireDate = [NSDate distantFuture];

self.timer = nil;

self.gress.progress = 0;

}

- (IBAction)iflyClick:(id)sender {

NSLog(@"iflyClick");按下button的时候调用方法TouchDown

_text = [[NSMutableString alloc]init];

[_iFlySpeechRecognizer startListening];

}

- (IBAction)iflyClickstop:(id)sender {

NSLog(@"iflyClickstop");离开button后调用的方法，无论是在按钮上离开还是在按钮外离开都执行。TouchUpInside&TouchUpOutside

[_iFlySpeechRecognizer stopListening];

}

#pragma  - mark -   AVAudioRecordDelegate

- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{

AVAudioSession *session = [AVAudioSession sharedInstance];

[session setCategory:AVAudioSessionCategoryPlayback error:nil]; //开启扬声器

[session setActive:YES error:nil];

if(![self.player isPlaying]){

[self.player play];

}

NSLog(@"录音完成!");

}

#pragma  - mark -   IFlySpeechRecognizerDelegate

- (void) onError:(IFlySpeechError *) errorCode{

NSLog(@"onError-----------------%@",errorCode);

}

- (void) onResults:(NSArray *) results isLast:(BOOL)isLast{

NSLog(@"onResults-----------------%@",results);

NSMutableString *result = [[NSMutableString alloc] init];

NSDictionary *dic = [results objectAtIndex:0];

for (NSString *key in dic){

[result appendFormat:@"%@",key];//合并结果

}

NSLog(@"result-------%@",result);

NSMutableArray *strArr = [[result componentsSeparatedByString:@"\"}]}"] mutableCopy];

[strArr removeLastObject];

for (NSString *str in strArr) {

[_text appendString:[[str componentsSeparatedByString:@"\""]lastObject]];

}

NSLog(@"_text-------%@",_text);

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

self.textField.text = _text;

});

}

-(void)viewWillDisappear:(BOOL)animated

{

[_iFlySpeechRecognizer cancel];

_iFlySpeechRecognizer.delegate = nil;

//设置回非语义识别

[_iFlySpeechRecognizer destroy];

[super viewWillDisappear:animated];

}