safety

lib/qr/qr_code_scan.dart

@@ -122,27 +122,28 @@ class _QrCodeScanPage extends State<QrCodeScanPage> {
     }
   }
 
-  startCameraResult(String data, List<Offset> offset) async {
+  void _startCameraResult(String data, List<Offset> offset) {
     showData(data);
     this.viewController.stopCamera();
   }
 
   Future onScan(QrReaderViewController viewController) async {
     this.viewController = viewController;
-    await this.viewController.startCamera(startCameraResult);
+    await this.viewController.startCamera(_startCameraResult);
   }
 
   showData(String data) {
     SmartDialog.show(
-        widget: Tips(
-          () {},
-          text: "$data",
-        ),
-        onDismiss: () {
-          Future.delayed(Duration(seconds: 1), () {
-            this.viewController.startCamera(startCameraResult);
-          });
+      widget: Tips(
+        () {},
+        text: "$data",
+      ),
+      onDismiss: () {
+        Future.delayed(Duration(seconds: 1), () {
+          this.viewController.startCamera(_startCameraResult);
         });
+      },
+    );
   }
 
   @override