diff --git a/Source/ZXing.Net.Mobile.iOS/MobileBarcodeScanner.cs b/Source/ZXing.Net.Mobile.iOS/MobileBarcodeScanner.cs
index 981e3c025..440e5ff16 100644
--- a/Source/ZXing.Net.Mobile.iOS/MobileBarcodeScanner.cs
+++ b/Source/ZXing.Net.Mobile.iOS/MobileBarcodeScanner.cs
@@ -14,17 +14,18 @@
 
 namespace ZXing.Mobile
 {
-    public class MobileBarcodeScanner : MobileBarcodeScannerBase
+	public class MobileBarcodeScanner : MobileBarcodeScannerBase
 	{
 		//ZxingCameraViewController viewController;
 		IScannerViewController viewController;
 
 		UIViewController appController;
 		ManualResetEvent scanResultResetEvent = new ManualResetEvent(false);
-
+		private bool is7orgreater = false;
 		public MobileBarcodeScanner (UIViewController delegateController)
 		{
 			appController = delegateController;
+			Initialise ();
 		}
 
 		public MobileBarcodeScanner ()
@@ -37,6 +38,13 @@ public MobileBarcodeScanner ()
 					break;
 				}
 			}
+			Initialise ();
+		}
+
+		private void Initialise() {
+			Version sv = new Version (0, 0, 0);
+			Version.TryParse (UIDevice.CurrentDevice.SystemVersion, out sv);
+			is7orgreater = sv.Major >= 7;
 		}
 
 		public Task<Result> Scan (bool useAVCaptureEngine)
@@ -51,63 +59,59 @@ public override Task<Result> Scan (MobileBarcodeScanningOptions options)
 		}
 
 
-        public override void ScanContinuously (MobileBarcodeScanningOptions options, Action<Result> scanHandler)
-        {
-            ScanContinuously (options, false, scanHandler);
-        }
-
-        public void ScanContinuously (MobileBarcodeScanningOptions options, bool useAVCaptureEngine, Action<Result> scanHandler)
-        {
-            try
-            {             
-                Version sv = new Version (0, 0, 0);
-                Version.TryParse (UIDevice.CurrentDevice.SystemVersion, out sv);
-
-                var is7orgreater = sv.Major >= 7;
-                var allRequestedFormatsSupported = true;
-
-                if (useAVCaptureEngine)
-                    allRequestedFormatsSupported = AVCaptureScannerView.SupportsAllRequestedBarcodeFormats(options.PossibleFormats);
-
-                this.appController.InvokeOnMainThread(() => {
-
-
-                    if (useAVCaptureEngine && is7orgreater && allRequestedFormatsSupported)
-                    {
-                        viewController = new AVCaptureScannerViewController(options, this);
-                        viewController.ContinuousScanning = true;
-                    }
-                    else
-                    {           
-                        if (useAVCaptureEngine && !is7orgreater)
-                            Console.WriteLine("Not iOS 7 or greater, cannot use AVCapture for barcode decoding, using ZXing instead");
-                        else if (useAVCaptureEngine && !allRequestedFormatsSupported)
-                            Console.WriteLine("Not all requested barcode formats were supported by AVCapture, using ZXing instead");
-
-                        viewController = new ZXing.Mobile.ZXingScannerViewController(options, this);
-                        viewController.ContinuousScanning = true;
-                    }
-
-                    viewController.OnScannedResult += barcodeResult => {
-
-                        // If null, stop scanning was called
-                        if (barcodeResult == null) {
-                            ((UIViewController)viewController).InvokeOnMainThread(() => {
-                                ((UIViewController)viewController).DismissViewController(true, null);
-                            });
-                        }
-
-                        scanHandler (barcodeResult);
-                    };
-
-                    appController.PresentViewController((UIViewController)viewController, true, null);
-                });
-            }
-            catch (Exception ex)
-            {
-                Console.WriteLine(ex);
-            }
-        }
+		public override void ScanContinuously (MobileBarcodeScanningOptions options, Action<Result> scanHandler)
+		{
+			ScanContinuously (options, false, scanHandler);
+		}
+
+		public void ScanContinuously (MobileBarcodeScanningOptions options, bool useAVCaptureEngine, Action<Result> scanHandler)
+		{
+			try
+			{             
+				var allRequestedFormatsSupported = true;
+
+				if (useAVCaptureEngine)
+					allRequestedFormatsSupported = AVCaptureScannerView.SupportsAllRequestedBarcodeFormats(options.PossibleFormats);
+
+				this.appController.InvokeOnMainThread(() => {
+
+
+					if (useAVCaptureEngine && is7orgreater && allRequestedFormatsSupported)
+					{
+						viewController = new AVCaptureScannerViewController(options, this);
+						viewController.ContinuousScanning = true;
+					}
+					else
+					{           
+						if (useAVCaptureEngine && !is7orgreater)
+							Console.WriteLine("Not iOS 7 or greater, cannot use AVCapture for barcode decoding, using ZXing instead");
+						else if (useAVCaptureEngine && !allRequestedFormatsSupported)
+							Console.WriteLine("Not all requested barcode formats were supported by AVCapture, using ZXing instead");
+
+						viewController = new ZXing.Mobile.ZXingScannerViewController(options, this);
+						viewController.ContinuousScanning = true;
+					}
+
+					viewController.OnScannedResult += barcodeResult => {
+
+						// If null, stop scanning was called
+						if (barcodeResult == null) {
+							((UIViewController)viewController).InvokeOnMainThread(() => {
+								((UIViewController)viewController).DismissViewController(true, null);
+							});
+						}
+
+						scanHandler (barcodeResult);
+					};
+
+					appController.PresentViewController((UIViewController)viewController, true, null);
+				});
+			}
+			catch (Exception ex)
+			{
+				Console.WriteLine(ex);
+			}
+		}
 
 		public Task<Result> Scan (MobileBarcodeScanningOptions options, bool useAVCaptureEngine)
 		{
@@ -119,10 +123,7 @@ public Task<Result> Scan (MobileBarcodeScanningOptions options, bool useAVCaptur
 
 					Result result = null;
 
-					Version sv = new Version (0, 0, 0);
-					Version.TryParse (UIDevice.CurrentDevice.SystemVersion, out sv);
 
-					var is7orgreater = sv.Major >= 7;
 					var allRequestedFormatsSupported = true;
 
 					if (useAVCaptureEngine)
@@ -130,7 +131,7 @@ public Task<Result> Scan (MobileBarcodeScanningOptions options, bool useAVCaptur
 
 					this.appController.InvokeOnMainThread(() => {
 
-										
+
 						if (useAVCaptureEngine && is7orgreater && allRequestedFormatsSupported)
 						{
 							viewController = new AVCaptureScannerViewController(options, this);							
@@ -147,24 +148,24 @@ public Task<Result> Scan (MobileBarcodeScanningOptions options, bool useAVCaptur
 
 						viewController.OnScannedResult += barcodeResult => {
 
-                            ((UIViewController)viewController).InvokeOnMainThread(() => {
-
-                                viewController.Cancel();
-
-                                // Handle error situation that occurs when user manually closes scanner in the same moment that a QR code is detected
-                                try {
-                                    ((UIViewController) viewController).DismissViewController(true, () => {
-                                        result = barcodeResult;
-                                        scanResultResetEvent.Set();
-                                    });
-                                } catch (ObjectDisposedException) {
-                                    // In all likelihood, iOS has decided to close the scanner at this point. But just in case it executes the
-                                    // post-scan code instead, set the result so we will not get a NullReferenceException.
-                                    result = barcodeResult;
-                                    scanResultResetEvent.Set();
-                                }
-                            });
-                        };
+							((UIViewController)viewController).InvokeOnMainThread(() => {
+
+								viewController.Cancel();
+
+								// Handle error situation that occurs when user manually closes scanner in the same moment that a QR code is detected
+								try {
+									((UIViewController) viewController).DismissViewController(true, () => {
+										result = barcodeResult;
+										scanResultResetEvent.Set();
+									});
+								} catch (ObjectDisposedException) {
+									// In all likelihood, iOS has decided to close the scanner at this point. But just in case it executes the
+									// post-scan code instead, set the result so we will not get a NullReferenceException.
+									result = barcodeResult;
+									scanResultResetEvent.Set();
+								}
+							});
+						};
 
 						appController.PresentViewController((UIViewController)viewController, true, null);
 					});
@@ -190,11 +191,11 @@ public override void Cancel ()
 				((UIViewController)viewController).InvokeOnMainThread(() => {
 					viewController.Cancel();
 
-                    // Calling with animated:true here will result in a blank screen when the scanner is closed on iOS 7.
-                    ((UIViewController)viewController).DismissViewController(false, null); 
+					// Calling with animated:true here will result in a blank screen when the scanner is closed on iOS 7.
+					((UIViewController)viewController).DismissViewController(is7orgreater, null); 
 				});
 			}
-                
+
 			scanResultResetEvent.Set();
 		}
 
@@ -214,15 +215,15 @@ public override void AutoFocus ()
 			//Does nothing on iOS
 		}
 
-        public override void PauseAnalysis ()
-        {
-            viewController.PauseAnalysis ();
-        }
+		public override void PauseAnalysis ()
+		{
+			viewController.PauseAnalysis ();
+		}
 
-        public override void ResumeAnalysis ()
-        {
-            viewController.ResumeAnalysis ();
-        }
+		public override void ResumeAnalysis ()
+		{
+			viewController.ResumeAnalysis ();
+		}
 
 		public override bool IsTorchOn {
 			get {
@@ -231,5 +232,4 @@ public override bool IsTorchOn {
 		}
 		public UIView CustomOverlay { get;set; }
 	}
-}
-
+}
\ No newline at end of file