scan barcode in cordova

Question

When i adding ZXing library then this code works for android But it cannot work in iOS. getting error 'ERROR: Plugin 'BarcodeScanner' not found, or is not a CDVPlugin. Check your plugin mapping in config.xml. '

$scope.scanBarcode = function() {
    $cordovaBarcodeScanner.scan().then(function(imageData) {
        alert(imageData.text);
        console.log("Barcode Format -> " + imageData.format);
        console.log("Cancelled -> " + imageData.cancelled);
    }, function(error) {
       console.log("An error happened -> " + error);
    })
}