public static void ScanContinuously(
string message,
QRCodeScanned onQrCodeScannedFunction,
TaskCompletionSource <bool> taskCompletionSource,
string closeButtonTitle,
bool tryInverted)
{
var scanner = new QrCodeScanner();
var overlayView = ScanQrOverlayView.Create(scanner);
scanner.CustomOverlay = overlayView;
overlayView.SetCancelButtonText(closeButtonTitle);
overlayView.SetDescriptionText(message);
var position = 0;
var isScanningContinouslyExecuting = false;
scanner.ScanContinuously(new MobileBarcodeScanningOptions()
{
DelayBetweenContinuousScans = 3000,
TryInverted = tryInverted
}, async result =>
{
if (isScanningContinouslyExecuting)
{
return;
}
isScanningContinouslyExecuting = true;
var scanQrUpdate = await onQrCodeScannedFunction.Invoke(position, result.Text);
if (scanQrUpdate == null)
{
return;
}
if (scanQrUpdate.WillCancel)
{
taskCompletionSource.SetResult(true);
taskCompletionSource = null;
scanner.Cancel();
return;
}
overlayView.SetDescriptionText(scanQrUpdate.UpdateMessage);
position++;
isScanningContinouslyExecuting = false;
});
}
partial void OnCancelButton(UIButton sender)
{
_scanner.Cancel();
}