iOS开发——Siri语音识别
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
#import
@interface SiriViewController () <SFSpeechRecognizerDelegate>
第三步：UI控件，实现siri识别方法，代码如下：
.h
#import
@interface SiriViewController : UIViewController
@end
.m
//
// 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
#import
#import "LongPressButton.h"
@interface SiriViewController ()
@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:^{
}];
}