Ionic BarcodeScanner does not work on ios

I created an ionic app, it is work on android good. But the barcode scanner is not working correct in ios.

My code;

$cordovaBarcodeScanner.scan().then(function (barcodeData) {
  console.log("Data : "+barcodeData.text);
});

But XCODE giving me something like that as non-stop;

When I tried to this;

  cordova.plugins.barcodeScanner.scan(
  function (result) {
      alert("We got a barcode\n" +
            "Result: " + result.text + "\n" +
            "Format: " + result.format + "\n" +
            "Cancelled: " + result.cancelled);
  }, 
  function (error) {
      alert("Scanning failed: " + error);
  },
  {
      "preferFrontCamera" : true, // iOS and Android
      "showFlipCameraButton" : true, // iOS and Android
      "prompt" : "Place a barcode inside the scan area", // supported on Android only
      "formats" : "QR_CODE,PDF_417", // default: all but PDF_417 and RSS_EXPANDED
      "orientation" : "landscape" // Android only (portrait|landscape), default unset so it rotates with the device
  }
};

getting this error:

Warning: Attempt to present <CDVbcsViewController: 0x15f30c400> on <MainViewController: 0x15dd4fab0> whose view is not in the window hierarchy!