iOS中 語音識別功能／語音轉文字教程具體解釋 韓俊強的博客
阿新 • • 發佈：2017-08-15
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4.錄音button相關動畫（我自己定義的，大家能夠借鑒）
5.初始化系統UI
6.最重要的部分
7.兩個代理方法
8.錄音button的一些操作
完畢以上操作，就大功告成了！
原文地址：http://blog.csdn.net/qq_31810357/article/details/51111702
前言：近期研究了一下語音識別，從百度語音識別到訊飛語音識別；首先說一下個人針對兩者的看法，訊飛毫無疑問比較專業。識別率也非常高真對語音識別是比較精準的，可是非常多開發人員和我一樣期望離線識別，而訊飛離線是收費的；請求次數來講。兩者都能夠申請高配額，針對用戶較多的差點兒都一樣。
基於免費而且支持離線我選擇了百度離線語音識別。比較簡單，UI設計多一點，以下寫一下教程：
1.首先：須要的庫
2.我是自己定義的UI所以以功能實現為主（頭文件）
// 頭文件 #import "BDVRCustomRecognitonViewController.h" #import "BDVRClientUIManager.h" #import "WBVoiceRecordHUD.h" #import "BDVRViewController.h" #import "MyViewController.h" #import "BDVRSConfig.h"
3.須要知道的功能：能用到的例如以下：
//－－－－－－－－－－－－－－－－－－－類方法－－－－－－－－－－－－－－－－－－－－－－－－ // 創建語音識別客戶對像，該對像是個單例 + (BDVoiceRecognitionClient *)sharedInstance; // 釋放語音識別客戶端對像 + (void)releaseInstance; //－－－－－－－－－－－－－－－－－－－識別方法－－－－－－－－－－－－－－－－－－－－－－－ // 推斷能否夠錄音 - (BOOL)isCanRecorder; // 開始語音識別，須要實現MVoiceRecognitionClientDelegate代理方法。並傳入實現對像監聽事件 // 返回值參考 TVoiceRecognitionStartWorkResult - (int)startVoiceRecognition:(id<MVoiceRecognitionClientDelegate>)aDelegate; // 說完了，用戶主動完畢錄音時調用 - (void)speakFinish; // 結束本次語音識別 - (void)stopVoiceRecognition; /** * @brief 獲取當前識別的採樣率 * * @return 採樣率(16000/8000) */ - (int)getCurrentSampleRate; /** * @brief 得到當前識別模式(deprecated) * * @return 當前識別模式 */ - (int)getCurrentVoiceRecognitionMode __attribute__((deprecated)); /** * @brief 設置當前識別模式(deprecated)。請使用-(void)setProperty:(TBDVoiceRecognitionProperty)property; * * @param 識別模式 * * @return 是否設置成功 */ - (void)setCurrentVoiceRecognitionMode:(int)aMode __attribute__((deprecated)); // 設置識別類型 - (void)setProperty:(TBDVoiceRecognitionProperty)property __attribute__((deprecated)); // 獲取當前識別類型 - (int)getRecognitionProperty __attribute__((deprecated)); // 設置識別類型列表, 除EVoiceRecognitionPropertyInput和EVoiceRecognitionPropertySong外 // 能夠識別類型復合 - (void)setPropertyList: (NSArray*)prop_list; // cityID僅對EVoiceRecognitionPropertyMap識別類型有效 - (void)setCityID: (NSInteger)cityID; // 獲取當前識別類型列表 - (NSArray*)getRecognitionPropertyList; //－－－－－－－－－－－－－－－－－－－提示音－－－－－－－－－－－－－－－－－－－－－－－ // 播放提示音。默覺得播放,錄音開始，錄音結束提示音 // BDVoiceRecognitionClientResources/Tone // record_start.caf 錄音開始聲音文件 // record_end.caf 錄音結束聲音文件 // 聲音資源須要加到項目project裏。用戶可替換資源文件，文件名稱不能夠變，建音提示音不宜過長，0。5秒左右。 // aTone 取值參考 TVoiceRecognitionPlayTones，如沒有找到文件。則返回ＮＯ - (BOOL)setPlayTone:(int)aTone isPlay:(BOOL)aIsPlay;
4.錄音button相關動畫（我自己定義的，大家能夠借鑒）
// 錄音button相關 @property (nonatomic, weak, readonly) UIButton *holdDownButton;// 說話button /** * 是否取消錄音 */ @property (nonatomic, assign, readwrite) BOOL isCancelled; /** * 是否正在錄音 */ @property (nonatomic, assign, readwrite) BOOL isRecording; /** * 當錄音button被按下所觸發的事件，這時候是開始錄音 */ - (void)holdDownButtonTouchDown; /** * 當手指在錄音button範圍之外離開屏幕所觸發的事件。這時候是取消錄音 */ - (void)holdDownButtonTouchUpOutside; /** * 當手指在錄音button範圍之內離開屏幕所觸發的事件，這時候是完畢錄音 */ - (void)holdDownButtonTouchUpInside; /** * 當手指滑動到錄音button的範圍之外所觸發的事件 */ - (void)holdDownDragOutside;
5.初始化系統UI
#pragma mark - layout subViews UI /** * 依據正常顯示和高亮狀態創建一個button對象 * * @param image 正常顯示圖 * @param hlImage 高亮顯示圖 * * @return 返回button對象 */ - (UIButton *)createButtonWithImage:(UIImage *)image HLImage:(UIImage *)hlImage ; - (void)holdDownDragInside; - (void)createInitView; // 創建初始化界面。播放提示音時會用到 - (void)createRecordView; // 創建錄音界面 - (void)createRecognitionView; // 創建識別界面 - (void)createErrorViewWithErrorType:(int)aStatus; // 在識別view中顯示具體錯誤信息 - (void)createRunLogWithStatus:(int)aStatus; // 在狀態view中顯示具體狀態信息 - (void)finishRecord:(id)sender; // 用戶點擊完畢動作 - (void)cancel:(id)sender; // 用戶點擊取消動作 - (void)startVoiceLevelMeterTimer; - (void)freeVoiceLevelMeterTimerTimer;
6.最重要的部分
// 錄音完畢 [[BDVoiceRecognitionClient sharedInstance] speakFinish];
// 取消錄音 [[BDVoiceRecognitionClient sharedInstance] stopVoiceRecognition];
7.兩個代理方法
- (void)VoiceRecognitionClientWorkStatus:(int)aStatus obj:(id)aObj
{
switch (aStatus)
{
case EVoiceRecognitionClientWorkStatusFlushData: // 連續上屏中間結果
{
NSString *text = [aObj objectAtIndex:0];
if ([text length] > 0)
{
// [clientSampleViewController logOutToContinusManualResut:text];
UILabel *clientWorkStatusFlushLabel = [[UILabel alloc]initWithFrame:CGRectMake(kScreenWidth/2 - 100,64,200,60)];
clientWorkStatusFlushLabel.text = text;
clientWorkStatusFlushLabel.textAlignment = NSTextAlignmentCenter;
clientWorkStatusFlushLabel.font = [UIFont systemFontOfSize:18.0f];
clientWorkStatusFlushLabel.numberOfLines = 0;
clientWorkStatusFlushLabel.backgroundColor = [UIColor whiteColor];
[self.view addSubview:clientWorkStatusFlushLabel];
}
break;
}
case EVoiceRecognitionClientWorkStatusFinish: // 識別正常完畢並獲得結果
{
[self createRunLogWithStatus:aStatus];
if ([[BDVoiceRecognitionClient sharedInstance] getRecognitionProperty] != EVoiceRecognitionPropertyInput)
{
// 搜索模式下的結果為數組，演示樣例為
// ["公園", "公元"]
NSMutableArray *audioResultData = (NSMutableArray *)aObj;
NSMutableString *tmpString = [[NSMutableString alloc] initWithString:@""];
for (int i=0; i < [audioResultData count]; i++)
{
[tmpString appendFormat:@"%@\r\n",[audioResultData objectAtIndex:i]];
}
clientSampleViewController.resultView.text = nil;
[clientSampleViewController logOutToManualResut:tmpString];
}
else
{
NSString *tmpString = [[BDVRSConfig sharedInstance] composeInputModeResult:aObj];
[clientSampleViewController logOutToContinusManualResut:tmpString];
}
if (self.view.superview)
{
[self.view removeFromSuperview];
}
break;
}
case EVoiceRecognitionClientWorkStatusReceiveData:
{
// 此狀態僅僅有在輸入模式下使用
// 輸入模式下的結果為帶置信度的結果，示比例如以下：
// [
// [
// {
// "百度" = "0.6055192947387695";
// },
// {
// "擺渡" = "0.3625582158565521";
// },
// ]
// [
// {
// "一下" = "0.7665404081344604";
// }
// ],
// ]
//臨時關掉 -- 否則影響跳轉結果
// NSString *tmpString = [[BDVRSConfig sharedInstance] composeInputModeResult:aObj];
// [clientSampleViewController logOutToContinusManualResut:tmpString];
break;
}
case EVoiceRecognitionClientWorkStatusEnd: // 用戶說話完畢，等待server返回識別結果
{
[self createRunLogWithStatus:aStatus];
if ([BDVRSConfig sharedInstance].voiceLevelMeter)
{
[self freeVoiceLevelMeterTimerTimer];
}
[self createRecognitionView];
break;
}
case EVoiceRecognitionClientWorkStatusCancel:
{
if ([BDVRSConfig sharedInstance].voiceLevelMeter)
{
[self freeVoiceLevelMeterTimerTimer];
}
[self createRunLogWithStatus:aStatus];
if (self.view.superview)
{
[self.view removeFromSuperview];
}
break;
}
case EVoiceRecognitionClientWorkStatusStartWorkIng: // 識別庫開始識別工作，用戶能夠說話
{
if ([BDVRSConfig sharedInstance].playStartMusicSwitch) // 假設播放了提示音。此時再給用戶提示能夠說話
{
[self createRecordView];
}
if ([BDVRSConfig sharedInstance].voiceLevelMeter) // 開啟語音音量監聽
{
[self startVoiceLevelMeterTimer];
}
[self createRunLogWithStatus:aStatus];
break;
}
case EVoiceRecognitionClientWorkStatusNone:
case EVoiceRecognitionClientWorkPlayStartTone:
case EVoiceRecognitionClientWorkPlayStartToneFinish:
case EVoiceRecognitionClientWorkStatusStart:
case EVoiceRecognitionClientWorkPlayEndToneFinish:
case EVoiceRecognitionClientWorkPlayEndTone:
{
[self createRunLogWithStatus:aStatus];
break;
}
case EVoiceRecognitionClientWorkStatusNewRecordData:
{
break;
}
default:
{
[self createRunLogWithStatus:aStatus];
if ([BDVRSConfig sharedInstance].voiceLevelMeter)
{
[self freeVoiceLevelMeterTimerTimer];
}
if (self.view.superview)
{
[self.view removeFromSuperview];
}
break;
}
}
}
- (void)VoiceRecognitionClientNetWorkStatus:(int) aStatus
{
switch (aStatus)
{
case EVoiceRecognitionClientNetWorkStatusStart:
{
[self createRunLogWithStatus:aStatus];
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
break;
}
case EVoiceRecognitionClientNetWorkStatusEnd:
{
[self createRunLogWithStatus:aStatus];
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
break;
}
}
}8.錄音button的一些操作
#pragma mark ------ 關於button操作的一些事情-------
- (void)holdDownButtonTouchDown {
// 開始動畫
_disPlayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(delayAnimation)];
_disPlayLink.frameInterval = 40;
[_disPlayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
self.isCancelled = NO;
self.isRecording = NO;
// 開始語音識別功能，之前必須實現MVoiceRecognitionClientDelegate協議中的VoiceRecognitionClientWorkStatus:obj方法
int startStatus = -1;
startStatus = [[BDVoiceRecognitionClient sharedInstance] startVoiceRecognition:self];
if (startStatus != EVoiceRecognitionStartWorking) // 創建失敗則報告錯誤
{
NSString *statusString = [NSString stringWithFormat:@"%d",startStatus];
[self performSelector:@selector(firstStartError:) withObject:statusString afterDelay:0.3]; // 延遲0.3秒。以便能在出錯時正常刪除view
return;
}
// "按住說話－松開搜索"提示
[voiceImageStr removeFromSuperview];
voiceImageStr = [[UIImageView alloc]initWithFrame:CGRectMake(kScreenWidth/2 - 40, kScreenHeight - 153, 80, 33)];
voiceImageStr.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"searchVoice"]];
[self.view addSubview:voiceImageStr];
}
- (void)holdDownButtonTouchUpOutside {
// 結束動畫
[self.view.layer removeAllAnimations];
[_disPlayLink invalidate];
_disPlayLink = nil;
// 取消錄音
[[BDVoiceRecognitionClient sharedInstance] stopVoiceRecognition];
if (self.view.superview)
{
[self.view removeFromSuperview];
}
}
- (void)holdDownButtonTouchUpInside {
// 結束動畫
[self.view.layer removeAllAnimations];
[_disPlayLink invalidate];
_disPlayLink = nil;
[[BDVoiceRecognitionClient sharedInstance] speakFinish];
}
- (void)holdDownDragOutside {
//假設已經開始錄音了, 才須要做拖曳出去的動作, 否則僅僅要切換 isCancelled, 不讓錄音開始.
if (self.isRecording) {
// if ([self.delegate respondsToSelector:@selector(didDragOutsideAction)]) {
// [self.delegate didDragOutsideAction];
// }
} else {
self.isCancelled = YES;
}
}
#pragma mark - layout subViews UI
- (UIButton *)createButtonWithImage:(UIImage *)image HLImage:(UIImage *)hlImage {
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(kScreenWidth/2 -36, kScreenHeight - 120, 72, 72)];
if (image)
[button setBackgroundImage:image forState:UIControlStateNormal];
if (hlImage)
[button setBackgroundImage:hlImage forState:UIControlStateHighlighted];
return button;
}
#pragma mark ----------- 動畫部分 -----------
- (void)startAnimation
{
CALayer *layer = [[CALayer alloc] init];
layer.cornerRadius = [UIScreen mainScreen].bounds.size.width/2;
layer.frame = CGRectMake(0, 0, layer.cornerRadius * 2, layer.cornerRadius * 2);
layer.position = CGPointMake([UIScreen mainScreen].bounds.size.width/2,[UIScreen mainScreen].bounds.size.height - 84);
// self.view.layer.position;
UIColor *color = [UIColor colorWithRed:arc4random()%10*0.1 green:arc4random()%10*0.1 blue:arc4random()%10*0.1 alpha:1];
layer.backgroundColor = color.CGColor;
[self.view.layer addSublayer:layer];
CAMediaTimingFunction *defaultCurve = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault];
_animaTionGroup = [CAAnimationGroup animation];
_animaTionGroup.delegate = self;
_animaTionGroup.duration = 2;
_animaTionGroup.removedOnCompletion = YES;
_animaTionGroup.timingFunction = defaultCurve;
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale.xy"];
scaleAnimation.fromValue = @0.0;
scaleAnimation.toValue = @1.0;
scaleAnimation.duration = 2;
CAKeyframeAnimation *opencityAnimation = [CAKeyframeAnimation animationWithKeyPath:@"opacity"];
opencityAnimation.duration = 2;
opencityAnimation.values = @[@0.8,@0.4,@0];
opencityAnimation.keyTimes = @[@0,@0.5,@1];
opencityAnimation.removedOnCompletion = YES;
NSArray *animations = @[scaleAnimation,opencityAnimation];
_animaTionGroup.animations = animations;
[layer addAnimation:_animaTionGroup forKey:nil];
[self performSelector:@selector(removeLayer:) withObject:layer afterDelay:1.5];
}
- (void)removeLayer:(CALayer *)layer
{
[layer removeFromSuperlayer];
}
- (void)delayAnimation
{
[self startAnimation];
}
完畢以上操作，就大功告成了！
溫馨提示：
1.因為是語音識別，須要用到麥克風相關權限。模擬器會爆12個錯誤。使用真機能夠解決；
2.涉及到授權文件相關並不復雜，projectBundle Identifier僅僅須要設置百度的離線授權一致就可以。例如以下圖：
終於效果例如以下：
有不懂或不明確的地方能夠微博聯系我：
iOS開發人員交流群：446310206
iOS中 語音識別功能／語音轉文字教程具體解釋 韓俊強的博客