// Get the instance
QCloudTTSEngine *ttsEngine = [QCloudTTSEngine getShareInstance];

// Terminate instance
[QCloudTTSEngine instanceRelease];

-(void) engineInit:(TtsMode)mode Delegate:(id<QCloudTTSEngineDelegate> _Nonnull) delegate; 


  [ttsEngine setOnlineAuthParam:123 SecretId:@"AK**Hp7" SecretKey:@"D9*c2" Token:nil];
  [ttsEngine setOnlineVoiceSpeed:1.0];
  [ttsEngine setOnlineVoiceType:1001];
  [ttsEngine setOnlineVoiceLanguage:1];
  [ttsEngine setOnlineVoiceVolume:0];
  [ttsEngine setTimeoutIntervalForRequest:15 *1000];
  [ttsEngine setTimeoutIntervalForResource:30 *1000];


NSString* secret_id = @"************************************";
NSString* secret_key =@"***************************";
NSString* lic_key = @"*******";
NSString* lic_pk = @"*******";
[tts setOfflineAuthParamDoOnline:lic_pk LicKey:lic_key SecretId:secret_id SecretKey:secret_key Token:nil RefreshAuth:NO];

NSString* lic_pk = @"hg93NdFojA**********v2Yh/M2BO";
NSString* lic = @"ZZ+MfsW*********HTXbt4=";
NSString* lic_sign = @"xK/7******w6CKE=";
[tts setOfflineAuthParamDoOffline:lic LicPk:lic_pk LicSign:lic_sign];

 NSString *resource_dir = [[NSBundle mainBundle] pathForResource:@"tts_resource" ofType:nil];
 [ttsEngine setOfflineResourceDir:resource_dir];
 [ttsEngine setOfflineVoiceType:@"pb"];
 [ttsEngine setOfflineVoiceSpeed:1.0];
 [ttsEngine setOfflineVoiceVolume:1.0];

  [ttsEngine setCheckNetworkIntervalTime:5 * 60];

// There is an internal queue, statements can be continuously added, and the SDK will synthesize them sequentially
TtsError error = nil;
error = [ttsEngine synthesize:@"The weather is nice today".text UtteranceId:@"Sentence 1"];
error = [ttsEngine synthesize:@"Tencent Cloud TTS".text UtteranceId:@"Sentence 2"];
error = [ttsEngine synthesize:@"Tencent Cloud AI".text UtteranceId:@"Sentence 3"];
error = [ttsEngine synthesize:@"Tencent Cloud".text UtteranceId:nil];

// Cancel unsynthesized tasks and clear the internal queue
[ttsEngine cancel];

-(void) onSynthesizeData:(NSData *_Nullable)data UtteranceId:(NSString *_Nullable)utteranceId Text:(NSString *_Nullable)text EngineType:(NSInteger)type{
    
    // You can save the audio here or send it to the playback API for playing, and call the player input API
}

-(void) onError:(TtsError *_Nullable)error UtteranceId:(NSString *_Nullable)utteranceId Text:(NSString *_Nullable)text{
    
    // You can add error post-processing here
  // Note: In actual business, if the backend error code of online composition is returned in hybrid mode, it should be ignored and not processed. The SDK will call offline composition to continue working.
  
}


- (void)onOfflineAuthInfo:(QCloudOfflineAuthInfo * _Nonnull)OfflineAuthInfo {
    
  // In offline or hybrid mode, this callback must be received after initialization, and the OfflineAuthInfo.err_code must be 0 to call the synthesis API. If err_code is not 0, please check the parameters or network and re-invoke engineInit.
  
    NSString *msg = [NSString stringWithFormat:@"OfflineAuthInfo:err_code=%@,err_msg=%@\n,deviceId=%@\n,expireTime=%@\n,respose=%@",@(OfflineAuthInfo.err_code),OfflineAuthInfo.err_msg,OfflineAuthInfo.deviceId,OfflineAuthInfo.expireTime,OfflineAuthInfo.respose];
    
    NSLog(@"%@",msg);

}



// Use the player provided in the SDK

 QCloudMediaPlayer player = [[QCloudMediaPlayer alloc]init];

//---------QCloudPlayerDelegate---------
// Playback start
-(void) onTTSPlayStart{
    NSLog(@"onTTSPlayStart");
}

// All audio in the queue finished playing, audio waiting
-(void) onTTSPlayWait{
    NSLog(@"onTTSPlayWait");
}

// Resume playback
-(void) onTTSPlayResume{
    NSLog(@"onTTSPlayResume");
}

// Pause and play
-(void) onTTSPlayPause{

    NSLog(@"onTTSPlayPause");
}
// Playback stopped
-(void)onTTSPlayStop{
    NSLog(@"onTTSPlayStop");
    
}
// Player exception
-(void)onTTSPlayError:(QCPlayerError* _Nullable)playError{
    NSLog(@"playError.code==%@,playError.massage==%@",@(playError.mCode),playError.message);
}

// About to play the next sentence, the corresponding audio sentence, and its utteranceId
-(void) onTTSPlayNextWithText:(NSString* _Nullable)text UtteranceId:(NSString* _Nullable)utteranceId{
    NSLog(@"text==%@,utteranceId==%@",text,utteranceId);
}

// Current character being played, index of the character in the sentence
```markdown
// currentIndex The index of the character being read in the current playing sentence
-(void)onTTSPlayProgressWithCurrentWord:(NSString*_Nullable)currentWord CurrentIndex:(NSInteger)currentIdex{
    NSLog(@"CurrentWord==%@,currentIdex==%@",currentWord,@(currentIdex));
}



// Through audio data parameter
QCPlayerError err = [_player enqueueWithData:data Text:text UtteranceId:utteranceId];

// Through audio file parameter
 NSString *str = [self filePathWithName:@"tmp.mp3"];
 NSURL * url = [NSURL URLWithString:str];
QCPlayerError err = [_player enqueueWithFile:url Text:text UtteranceId:utteranceId];