startScan method
Start recognition objects of type RecognitionType
delay - delay in milliseconds between detection for decreasing CPU consumption.
Detection happens every delay milliseconds, skipping frames during delay
Can throw PlatformException if camera is not initialized.
Implementation
Future<void> startScan(int delay,int isPDF417) async {
print("BarcodeScannerController====startScan=====PDF417============="+isPDF417.toString());
return _barcodeScannerState?._startScan(delay,isPDF417);
}