rename nrOfCameras to numberOfCameras

 ## 3.5.6
 ## 3.5.6
 Bugs fixed:
 Bugs fixed:
-* [web] Fixed a crash with the ZXing barcode format (@thanks @hazzo!)
+* [web] Fixed a crash with the ZXing barcode format (thanks @hazzo!)
 * [web] Fixed stream controller not being closed on web.
 * [web] Fixed stream controller not being closed on web.
 * [iOS] Fixed a crash with unsupported torch modes. (thanks @navaronbracke !)
 * [iOS] Fixed a crash with unsupported torch modes. (thanks @navaronbracke !)
 * [iOS] Fixed a crash with the camera discovery session. (thanks @navaronbracke !)
 * [iOS] Fixed a crash with the camera discovery session. (thanks @navaronbracke !)
@@ -8,7 +8,7 @@ Bugs fixed:
 Improvements:
 Improvements:
 * Upgrade camera dependencies on Android.
 * Upgrade camera dependencies on Android.
 * Upgrade compileSdk version to 34 on Android.
 * Upgrade compileSdk version to 34 on Android.
-* Add nrOfCameras parameter in MobileScannerArguments callback, which shows how many cameras there are available on Android. 
+* Add numberOfCameras parameter in MobileScannerArguments callback, which shows how many cameras there are available on Android. 
 * [Android] Migrated to ResolutionSelector with ResolutionStrategy. You can opt in into the new selector by setting [useNewCameraSelector] in the [MobileScannerController] to true.
 * [Android] Migrated to ResolutionSelector with ResolutionStrategy. You can opt in into the new selector by setting [useNewCameraSelector] in the [MobileScannerController] to true.
 
 
 ## 3.5.5
 ## 3.5.5

@@ -250,7 +250,7 @@ class MobileScanner(
 
 
         cameraProviderFuture.addListener({
         cameraProviderFuture.addListener({
             cameraProvider = cameraProviderFuture.get()
             cameraProvider = cameraProviderFuture.get()
-            val nrOfCameras = cameraProvider?.availableCameraInfos?.size
+            val numberOfCameras = cameraProvider?.availableCameraInfos?.size
 
 
             if (cameraProvider == null) {
             if (cameraProvider == null) {
                 mobileScannerErrorCallback(CameraError())
                 mobileScannerErrorCallback(CameraError())
@@ -374,7 +374,7 @@ class MobileScanner(
                     if (portrait) height else width,
                     if (portrait) height else width,
                     camera?.cameraInfo?.hasFlashUnit() ?: false,
                     camera?.cameraInfo?.hasFlashUnit() ?: false,
                     textureEntry!!.id(),
                     textureEntry!!.id(),
-                    nrOfCameras ?: 0
+                    numberOfCameras ?: 0
                 )
                 )
             )
             )
         }, executor)
         }, executor)

@@ -180,7 +180,7 @@ class MobileScannerHandler(
                         "textureId" to it.id,
                         "textureId" to it.id,
                         "size" to mapOf("width" to it.width, "height" to it.height),
                         "size" to mapOf("width" to it.width, "height" to it.height),
                         "torchable" to it.hasFlashUnit,
                         "torchable" to it.hasFlashUnit,
-                        "nrOfCameras" to it.nrOfCameras
+                        "numberOfCameras" to it.numberOfCameras
                     ))
                     ))
                 }
                 }
             },
             },

@@ -5,5 +5,5 @@ class MobileScannerStartParameters(
     val height: Double,
     val height: Double,
     val hasFlashUnit: Boolean,
     val hasFlashUnit: Boolean,
     val id: Long,
     val id: Long,
-    val nrOfCameras: Int
+    val numberOfCameras: Int
 )
 )

@@ -47,7 +47,7 @@ class _BarcodeScannerWithControllerState
     }
     }
   }
   }
 
 
-  int? nrOfCameras;
+  int? numberOfCameras;
 
 
   @override
   @override
   Widget build(BuildContext context) {
   Widget build(BuildContext context) {
@@ -60,8 +60,8 @@ class _BarcodeScannerWithControllerState
             children: [
             children: [
               MobileScanner(
               MobileScanner(
                 onScannerStarted: (arguments) {
                 onScannerStarted: (arguments) {
-                  if (arguments?.nrOfCameras != null) {
-                    nrOfCameras = arguments!.nrOfCameras;
+                  if (mounted && arguments?.numberOfCameras != null) {
+                    numberOfCameras = arguments!.numberOfCameras;
                     setState(() {});
                     setState(() {});
                   }
                   }
                 },
                 },
@@ -154,7 +154,7 @@ class _BarcodeScannerWithControllerState
                           },
                           },
                         ),
                         ),
                         iconSize: 32.0,
                         iconSize: 32.0,
-                        onPressed: nrOfCameras != null && nrOfCameras! < 2
+                        onPressed: (numberOfCameras ?? 0) < 2
                             ? null
                             ? null
                             : () => controller.switchCamera(),
                             : () => controller.switchCamera(),
                       ),
                       ),

@@ -229,7 +229,7 @@ class _MobileScannerState extends State<MobileScanner>
                     value.size,
                     value.size,
                     value.webId,
                     value.webId,
                     value.textureId,
                     value.textureId,
-                    value.nrOfCameras,
+                    value.numberOfCameras,
                   ),
                   ),
                   widget.overlay!,
                   widget.overlay!,
                 ],
                 ],
@@ -239,7 +239,7 @@ class _MobileScannerState extends State<MobileScanner>
                 value.size,
                 value.size,
                 value.webId,
                 value.webId,
                 value.textureId,
                 value.textureId,
-                value.nrOfCameras,
+                value.numberOfCameras,
               );
               );
             }
             }
           },
           },
@@ -248,7 +248,12 @@ class _MobileScannerState extends State<MobileScanner>
     );
     );
   }
   }
 
 
-  Widget _scanner(Size size, String? webId, int? textureId, int? nrOfCameras) {
+  Widget _scanner(
+    Size size,
+    String? webId,
+    int? textureId,
+    int? numberOfCameras,
+  ) {
     return ClipRect(
     return ClipRect(
       child: LayoutBuilder(
       child: LayoutBuilder(
         builder: (_, constraints) {
         builder: (_, constraints) {

@@ -312,7 +312,7 @@ class MobileScannerController {
 
 
     isStarting = false;
     isStarting = false;
     return startArguments.value = MobileScannerArguments(
     return startArguments.value = MobileScannerArguments(
-      nrOfCameras: startResult['nrOfCameras'] as int?,
+      numberOfCameras: startResult['numberOfCameras'] as int?,
       size: size,
       size: size,
       hasTorch: hasTorch,
       hasTorch: hasTorch,
       textureId: kIsWeb ? null : startResult['textureId'] as int?,
       textureId: kIsWeb ? null : startResult['textureId'] as int?,

@@ -16,14 +16,15 @@ class MobileScannerArguments {
   final String? webId;
   final String? webId;
 
 
   /// Indicates how many cameras are available.
   /// Indicates how many cameras are available.
-  /// Only available on Android
-  final int? nrOfCameras;
+  ///
+  /// Currently only supported on Android.
+  final int? numberOfCameras;
 
 
   MobileScannerArguments({
   MobileScannerArguments({
     required this.size,
     required this.size,
     required this.hasTorch,
     required this.hasTorch,
     this.textureId,
     this.textureId,
     this.webId,
     this.webId,
-    this.nrOfCameras,
+    this.numberOfCameras,
   });
   });
 }
 }