使用微軟的SPXSpeechRecognizer語音轉(zhuǎn)文字出現(xiàn)卡頓五六秒的情況。
解決辦法：

// 優(yōu)雅地停止語音識別
// 將高計算量的邏輯放在后臺線程中執(zhí)行
dispatch_queue_t calculationQueue = dispatch_queue_create("com.example.calculation", DISPATCH_QUEUE_SERIAL);
dispatch_async(calculationQueue, ^{

    // 在需要的地方調(diào)用停止語音識別的方法
    [self stopAndReleaseSpeechRecognizer];
});

• (void)stopAndReleaseSpeechRecognizer {
  if (self.speechRecognizerS) {
  @try {
  [self.speechRecognizerS stopContinuousRecognition];
  self.speechRecognizerS = nil;
  }
  @catch (NSException *exception) {
  NSLog(@"Exception occurred while stopping continuous recognition: %@", exception.reason);
  }
  }
  }