iOS 10 出来之后，我们开发者也可以使用类似Siri的功能。。让我们来看看怎么使用吧，其实他是使用Siri里面的一个语音识别框架Speech framework。 让我们来看看 一些 主要的代码吧。 我们需要一个 UITextView 和 UIButton 就 能体现了。

第一步：定义属性

@interface ViewController ()  <SFSpeechRecognizerDelegate>

@property (strong, nonatomic) UIButton *siriBtu;

@property (strong, nonatomic) UITextView *siriTextView;

@property (strong, nonatomic) SFSpeechRecognitionTask *recognitionTask;

@property (strong, nonatomic)SFSpeechRecognizer *speechRecognizer;

@property (strong, nonatomic) SFSpeechAudioBufferRecognitionRequest *recognitionRequest;

@property (strong, nonatomic)AVAudioEngine *audioEngine;

@end

第二步：进行语音识别检测

- (void)viewDidLoad {

[super viewDidLoad];

NSLocale *cale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh-CN"];

self.speechRecognizer = [[SFSpeechRecognizer alloc]initWithLocale:cale];

self.siriBtu.enabled = false;

_speechRecognizer.delegate = self;

[SFSpeechRecognizer requestAuthorization:^(SFSpeechRecognizerAuthorizationStatus status) {

bool isButtonEnabled = false;

switch (status) {

case SFSpeechRecognizerAuthorizationStatusAuthorized:

isButtonEnabled = true;

NSLog(@"可以语音识别");

break;

case SFSpeechRecognizerAuthorizationStatusDenied:

isButtonEnabled = false;

NSLog(@"用户被拒绝访问语音识别");

break;

case SFSpeechRecognizerAuthorizationStatusRestricted:

isButtonEnabled = false;

NSLog(@"不能在该设备上进行语音识别");

break;

case SFSpeechRecognizerAuthorizationStatusNotDetermined:

isButtonEnabled = false;

NSLog(@"没有授权语音识别");

break;

default:

break;

}

self.siriBtu.enabled = isButtonEnabled;

}];

self.audioEngine = [[AVAudioEngine alloc]init];

}

第三步：按钮的点击事件

- (void)microphoneTap:(UIButton *)sender {

if ([self.audioEngine isRunning]) {

[self.audioEngine stop];

[self.recognitionRequest endAudio];

self.siriBtu.enabled = YES;

[self.siriBtu setTitle:@"开始录制" forState:UIControlStateNormal];

}else{

[self startRecording];

[self.siriBtu setTitle:@"停止录制" forState:UIControlStateNormal];

}}

第四步 ：开始录制语音，以及将语音转为文字

-(void)startRecording{

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;

SFSpeechAudioBufferRecognitionRequest *recognitionRequest;

self.recognitionRequest.shouldReportPartialResults = true;

self.recognitionTask = [self.speechRecognizer recognitionTaskWithRequest:self.recognitionRequest resultHandler:^(SFSpeechRecognitionResult * _Nullable result, NSError * _Nullable error) {

bool isFinal = false;

if (result) {

self.siriTextView.text = [[result bestTranscription] formattedString];

isFinal = [result isFinal];

}

if (error || isFinal) {

[self.audioEngine stop];

[inputNode removeTapOnBus:0];

self.recognitionRequest = nil;

self.recognitionTask = nil;

self.siriBtu.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.siriTextView.text = @"我是小冰！😀Siri 冰，你说我听";

}

最后一个代理方法：

-(void)speechRecognizer:(SFSpeechRecognizer *)speechRecognizer availabilityDidChange:(BOOL)available{

if(available){

self.siriBtu.enabled = true;

}else{

self.siriBtu.enabled = false;

}

}

这样我们 就可以实现Siri的功能了，