iOS开发——Siri语音识别

来源：互联网发布：沉戟酥油饼txt知乎编辑：程序博客网时间：2024/05/17 12:07

原理：先用系统的录音器录音，让后让siri识别语音转文字

第一步：在项目plist文件添加授权，如下图

第二步：导入头文件，添加协议，

#import <Speech/Speech.h>

#import <AVFoundation/AVFoundation.h>

@interface SiriViewController () <SFSpeechRecognizerDelegate>

第三步：UI控件，实现siri识别方法，代码如下：

#import <UIKit/UIKit.h>@interface SiriViewController : UIViewController@end

////  SiriViewController.m//  ASR////  Created by 刘成利 on 2017/2/28.//  Copyright © 2017年 刘成利. All rights reserved.//#define sWith     [UIScreen mainScreen].bounds.size.width#define sHeight   [UIScreen mainScreen].bounds.size.height#import "SiriViewController.h"#import <Speech/Speech.h>#import <AVFoundation/AVFoundation.h>#import "LongPressButton.h"@interface SiriViewController () <SFSpeechRecognizerDelegate>@property (nonatomic, strong) LongPressButton *longButton;    // 长按按钮@property (nonatomic, strong) UITextField     *inputText;     // 语音转化成的文本// 录音引擎@property (strong, nonatomic) AVAudioEngine            *audioEngine;// 语音识别任务@property (strong, nonatomic) SFSpeechRecognitionTask  *recognitionTask;// 语音识别器@property (strong, nonatomic) SFSpeechRecognizer       *speechRecognizer;// 识别请求@property (strong, nonatomic) SFSpeechAudioBufferRecognitionRequest *recognitionRequest;@end@implementation SiriViewController- (void)viewDidLoad {    [super viewDidLoad];        self.view.backgroundColor = [UIColor whiteColor];        // 创建信息label    UILabel *textLabel      = [[UILabel alloc] initWithFrame:CGRectMake(50, 50, sWith-100, 30)];    textLabel.text          = @"【Siri】语音识别转文字";    textLabel.font          = [UIFont fontWithName:@"HelveticaNeue" size:20.f];    textLabel.textColor     = [UIColor blackColor];    textLabel.textAlignment = NSTextAlignmentCenter;    [self.view addSubview:textLabel];                   // 退出控制器    {                UIButton *dismissButton        = [[UIButton alloc] initWithFrame:CGRectMake(sWith/2-50, sHeight-100, 100, 50)];        dismissButton.tag              = 10;        dismissButton.backgroundColor  = [UIColor lightGrayColor];        dismissButton.titleLabel.font  = [UIFont fontWithName:@"HelveticaNeue" size:16.f];        [dismissButton setTitle:@"返回上一页" forState:UIControlStateNormal];        [dismissButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];        [dismissButton setTitleColor:[UIColor grayColor] forState:UIControlStateHighlighted];        [dismissButton addTarget:self action:@selector(dismiss) forControlEvents:UIControlEventTouchUpInside];        [self.view addSubview:dismissButton];    }            // 语音识别                  self.inputText = [[UITextField alloc]initWithFrame:CGRectMake(50, 200, sWith-100, 100)];        self.inputText.backgroundColor = [[UIColor blackColor]colorWithAlphaComponent:0.2];        [self.view addSubview:self.inputText];                                    // 长按按钮    self.longButton = [[LongPressButton alloc]initWithFrame:CGRectMake(sWith/2-50, sHeight-300, sWith-300, sWith-300)];    self.longButton.removeLoading = YES;        // 保持在视图最上面    [[UIApplication sharedApplication].keyWindow addSubview:self.longButton];    [[UIApplication sharedApplication].keyWindow bringSubviewToFront:self.longButton];        __weak SiriViewController *weakSelf = self;    self.longButton.eventBlock = ^(TouchType TouchType,NSTimeInterval time){                switch (TouchType) {            case LongTouchBegin:                [weakSelf startEvent];                break;            case LongTouchEnd:                [weakSelf endEvent];                break;                                            default:                break;        }                    };            // 基本设置    [self basicSetup];        }- (void)basicSetup{            // 设备识别语言为中文    NSLocale *cale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh-CN"];    self.speechRecognizer = [[SFSpeechRecognizer alloc]initWithLocale:cale];        // 申请权限认证    [SFSpeechRecognizer requestAuthorization:^(SFSpeechRecognizerAuthorizationStatus status) {        dispatch_async(dispatch_get_main_queue(), ^{            switch (status) {                case SFSpeechRecognizerAuthorizationStatusNotDetermined:                    self.longButton.userInteractionEnabled = NO;                    self.inputText.text  = @"没有授权语音识别";                    break;                case SFSpeechRecognizerAuthorizationStatusDenied:                    self.longButton.userInteractionEnabled = NO;                    self.inputText.text   = @"用户拒绝使用语音识别权限";                    break;                case SFSpeechRecognizerAuthorizationStatusRestricted:                    self.longButton.userInteractionEnabled = NO;                    self.inputText.text   = @"不能在该设备上进行语音识别";                                        break;                case SFSpeechRecognizerAuthorizationStatusAuthorized:                    self.longButton.userInteractionEnabled = YES;                    self.inputText.text   = @"设备录音可用";                    break;                                    default:                    break;            }                    });    }];    // 创建录音引擎    self.audioEngine = [[AVAudioEngine alloc]init];}// 语音按钮识别事件- (void)endEvent{                    if ([self.audioEngine isRunning]) {                [self.audioEngine stop];        [self.recognitionRequest endAudio];          }                [self.longButton finishAndRest];    }// 识别语音-(void)startEvent{    if (self.recognitionTask) {        [self.recognitionTask cancel];        self.recognitionTask = nil;    }    AVAudioSession *audioSession = [AVAudioSession sharedInstance];    bool  audioBool = [audioSession setCategory:AVAudioSessionCategoryRecord error:nil];    bool  audioBool1= [audioSession setMode:AVAudioSessionModeMeasurement error:nil];    bool  audioBool2= [audioSession setActive:true withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation error:nil];    if (audioBool || audioBool1||  audioBool2) {        NSLog(@"可以使用");    }else{        NSLog(@"这里说明有的功能不支持");    }    self.recognitionRequest = [[SFSpeechAudioBufferRecognitionRequest alloc]init];    AVAudioInputNode *inputNode = self.audioEngine.inputNode;    self.recognitionRequest.shouldReportPartialResults = true;        //开始识别任务    self.recognitionTask = [self.speechRecognizer recognitionTaskWithRequest:self.recognitionRequest resultHandler:^(SFSpeechRecognitionResult * _Nullable result, NSError * _Nullable error) {        bool isFinal = false;        if (result) {            self.inputText.text = [[result bestTranscription] formattedString]; //语音转文本            isFinal = [result isFinal];        }        if (error || isFinal) {            [self.audioEngine stop];            [inputNode removeTapOnBus:0];            self.recognitionRequest = nil;            self.recognitionTask = nil;//            self.siriButton.enabled = true;        }    }];    AVAudioFormat *recordingFormat = [inputNode outputFormatForBus:0];    [inputNode installTapOnBus:0 bufferSize:1024 format:recordingFormat block:^(AVAudioPCMBuffer * _Nonnull buffer, AVAudioTime * _Nonnull when) {        [self.recognitionRequest appendAudioPCMBuffer:buffer];    }];    [self.audioEngine prepare];    bool audioEngineBool = [self.audioEngine startAndReturnError:nil];    NSLog(@"%d",audioEngineBool);//    self.inputText.text = @"正在录音。。。";}#pragma mark - SFSpeechRecognizerDelegate- (void)speechRecognizer:(SFSpeechRecognizer *)speechRecognizer availabilityDidChange:(BOOL)available{    if (available) {                self.inputText.text = @"语音识别可用";            }else{              self.inputText.text = @"语音识别不可用";    }}// 退出控制器- (void)dismiss{                [self dismissViewControllerAnimated:YES completion:^{            }];    }

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