iphone之使用讯飞语音sdk实现语音识别功能

1、首先下载讯飞sdk及文档：http://open.voicecloud.cn/

2、学习里面的demo简单实现了一个小的语音识别功能

先做一个简单demo，看看识别效果。注：语音识别必须联网。

所有接口必需在联网状态下才能正常使用。

效果图:

#import <UIKit/UIKit.h>
#import "iflyMSC/IFlySpeechRecognizer.h"
#import "iflyMSC/IFlyDataUploader.h"

@protocol SpeechAlertViewDelegate <NSObject>
@optional
- (void)getResultText:(NSString *)text;
@end

@interface SpeechAlertView : UIAlertView<IFlySpeechRecognizerDelegate>
{
    UIImageView *speechImage;//声音图片

    IFlySpeechRecognizer * _iFlySpeechRecognizer;//语音识别对象
    UIView *backgroundView;
}
@property (assign, nonatomic)id<SpeechAlertViewDelegate> speechDelegate;
@end

#import "SpeechAlertView.h"
#define APPID @"51de5743"
#define TIMEOUT @"20000"
// timeout      连接超时的时间，以ms为单位，毫秒，符号ms ，1000 毫秒 = 1秒，30000=30秒
//timeout:网络超时时间,单位:ms,默认为20000,范围0-30000
@implementation SpeechAlertView

-(id)init
{
    self = [super initWithFrame:CGRectMake(0, 0, 300, 220)];
    if (self) {
        // Initialization code
    }
    return self;
}
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

//uialertview的大小位置
-(void)setFrame:(CGRect)frame{
    //重新设置弹出框的大小和位置
    UIWindow *window =  [UIApplication sharedApplication].keyWindow;

    [super setFrame:CGRectMake((window.frame.size.width-self.frame.size.width)/2, (window.frame.size.height-self.frame.size.height)/2, self.frame.size.width, self.frame.size.height)];
}
//重新写界面内容
- (void) layoutSubviews {
    //屏蔽系统的ImageView 和 UIButton
    for (UIView *v in [self subviews]) {
        if ([v class] == [UIImageView class]){
            [v setHidden:YES];
        }

        if ([v isKindOfClass:[UIButton class]] ||
            [v isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {
            [v setHidden:YES];
        }
    }

    //添加背影图
    UIView *backView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
    backView.backgroundColor = [UIColor colorWithRed:66/255.0 green:68/255.0 blue:70/255.0 alpha:1.0];
    [self addSubview:backView];

    //添加标题
    UILabel *titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, backView.frame.size.width-20, 30)];
    titleLabel.backgroundColor = [UIColor clearColor];
    titleLabel.text = @"语音识别";
    titleLabel.font = [UIFont systemFontOfSize:16];
    titleLabel.textColor = [UIColor colorWithRed:218.0/255.0 green:217.0/255.0 blue:217.0/255.0 alpha:1];
    [backView addSubview:titleLabel];

    //添加关闭按钮huati_close
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setImage:[UIImage imageNamed:@"alert_close.png"] forState:UIControlStateNormal];
    [backView addSubview:button];
    button.tag = 1;
    button.frame = CGRectMake(backView.frame.size.width-25, 5, 20, 20);
    [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

    //添加黄线
    UIView *xianView = [[UIView alloc]initWithFrame:CGRectMake(0, 30, backView.frame.size.width, 1)];
    xianView.backgroundColor = [UIColor yellowColor];
    [backView addSubview:xianView];

    //添加内容
    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 35, backView.frame.size.width, 40)];
    label.backgroundColor = [UIColor clearColor];
    label.text = @"默认不讲话5秒后自动关闭，间隔不讲话2秒后关闭，最多说20秒";
    label.font = [UIFont boldSystemFontOfSize:15];
    label.textAlignment = UITextAlignmentCenter;
    label.textColor = [UIColor yellowColor];
    [backView addSubview:label];
    label.numberOfLines = 0;

    //添加中间图片
    speechImage = [[UIImageView alloc]initWithFrame:CGRectMake((self.frame.size.width-50)/2, 80, 50, 85)];
    speechImage.image = [UIImage imageNamed:@"yuyin_01.png"];
    [backView addSubview:speechImage];

    //添加说完了按钮
    UIButton *submitButton = [UIButton buttonWithType:UIButtonTypeCustom];

    submitButton.frame = CGRectMake((backView.frame.size.width-170)/2, 170, 150, 35);
    submitButton.tag = 2;
    [submitButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [submitButton setTitle:@"说完了" forState:UIControlStateNormal];
    [submitButton setBackgroundImage:[UIImage imageNamed:@"alert_tButton.png"] forState:UIControlStateNormal];
    [submitButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [backView addSubview:submitButton];
    //想添加什么由此添加

    //创建对象
    NSString *initString = [[NSString alloc] initWithFormat:@"appid=%@,timeout=%@",APPID,TIMEOUT];
    //语音识别对象创建
    _iFlySpeechRecognizer = nil;
    _iFlySpeechRecognizer = [IFlySpeechRecognizer createRecognizer:initString delegate:self];
//    _iFlySpeechRecognizer.delegate = self;
    /*
     2.vad_bos:静音超时时间,即用户多长时间不说话则当做超 时处理,单位:ms,engine 指定 sms 识别默认值为 5000,其他 情况默认值为 4000,范围 0-10000;
     3.vad_eos: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,单位:ms,sms 识别默认 值为 1800,其他默认值为 700,范围 0-10000;
     */
    [_iFlySpeechRecognizer setParameter:@"domain" value:@"sms"];
    [_iFlySpeechRecognizer setParameter:@"sample_rate" value:@"16000"];
    [_iFlySpeechRecognizer setParameter:@"plain_result" value:@"0"];
    initString = nil;

    //开始识别
    [_iFlySpeechRecognizer startListening];

}
//按钮处理方法
-(void) buttonClicked:(id)sender
{
    [self dismissWithClickedButtonIndex:0 animated:YES];

}

//显示
-(void)show
{
//    [super show];
    UIWindow *window =  [UIApplication sharedApplication].keyWindow;
    backgroundView = [[UIView alloc]initWithFrame:window.frame];
    backgroundView.backgroundColor = [UIColor clearColor];
    [backgroundView addSubview:self];
    [window addSubview:backgroundView];
}
//弹出框消失
-(void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated
{
    [_iFlySpeechRecognizer stopListening];
    [_iFlySpeechRecognizer cancel];
    [_iFlySpeechRecognizer setDelegate:nil];
    _iFlySpeechRecognizer = nil;
    speechImage = nil;
    [backgroundView removeFromSuperview];
    backgroundView = nil;
}

#pragma mark - IFlySpeechRecognizerDelegate
- (void) onVolumeChanged: (int)volume
{
    NSLog(@"%d",volume);
    //录音的音量，音量范围1~100
    if (volume>=0 &&volume<=5) {
        speechImage.image = [UIImage imageNamed:@"yuyin_01.png"];
    }else if(volume>5 && volume<=30){
        speechImage.image = [UIImage imageNamed:@"yuyin_02.png"];
    }else{
        speechImage.image = [UIImage imageNamed:@"yuyin_03.png"];
    }
}

- (void) onBeginOfSpeech
{
    NSLog(@"正在录音");
}

- (void) onEndOfSpeech
{
    NSLog(@"停止录音");
}

- (void) onError:(IFlySpeechError *) error
{
    NSLog(@"停止录音%@,%@",error,[error errorDesc]);
    [self dismissWithClickedButtonIndex:0 animated:YES];
}

//结果
- (void) onResults:(NSArray *) results
{
    NSMutableString *result = [[NSMutableString alloc] init];
    NSDictionary *dic = [results objectAtIndex:0];
    for (NSString *key in dic) {
        [result appendFormat:@"%@",key];
    }
    NSLog(@"转写结果：%@--results:%@",result,results);

    //返回结果
    [_speechDelegate getResultText:result];
}

@end

源码下载地址：

http://download.csdn.net/detail/rhljiayou/5889565