コード例 #1
0
        protected override void OnElementChanged(ElementChangedEventArgs <PickerView> e)
        {
            base.OnElementChanged(e);

            if (e.NewElement != null)
            {
                pickerView = e.NewElement;

                e.NewElement.StartScanningRequested += OnStartScanningRequested;
                e.NewElement.PauseScanningRequested += OnPauseScanningRequested;

                barcodePicker = new RotationSettingAwareBarcodePicker(CreateScanSettings());
                SetNativeControl(barcodePicker.View);
                scanDelegate = new PickerScanDelegate
                {
                    PickerView          = pickerView,
                    ContinuousAfterScan = pickerView.Settings.ContinuousAfterScan
                };
                barcodePicker.ScanDelegate = scanDelegate;

                ApplyOverlaySettings();
                barcodePicker.StartScanning();
            }
            if (e.OldElement != null)
            {
                e.OldElement.StartScanningRequested -= OnStartScanningRequested;
                e.OldElement.PauseScanningRequested -= OnPauseScanningRequested;
            }
        }
コード例 #2
0
        partial void scanButtonClicked(Foundation.NSObject sender)
        {
            // The scanning behavior of the barcode picker is configured through scan
            // settings. We start with empty scan settings and enable a very generous
            // set of symbologies. In your own apps, only enable the symbologies you
            // actually need.
            ScanSettings settings            = ScanSettings.DefaultSettings();
            NSSet        symbologiesToEnable = new NSSet(
                Symbology.EAN13,
                Symbology.EAN8,
                Symbology.UPC12,
                Symbology.UPCE,
                Symbology.Datamatrix,
                Symbology.QR,
                Symbology.Code39,
                Symbology.Code128,
                Symbology.ITF
                );

            settings.EnableSymbologies(symbologiesToEnable);


            // Some 1d barcode symbologies allow you to encode variable-length data. By default, the
            // Scandit BarcodeScanner SDK only scans barcodes in a certain length range. If your
            // application requires scanning of one of these symbologies, and the length is falling
            // outside the default range, you may need to adjust the "active symbol counts" for this
            // symbology. This is shown in the following 3 lines of code.

            NSMutableSet codeLengths = new NSMutableSet();
            int          i           = 0;

            for (i = 7; i <= 20; i++)
            {
                codeLengths.Add(new NSNumber(i));
            }
            settings.SettingsForSymbology(Symbology.Code128).ActiveSymbolCounts = codeLengths;
            // For details on defaults and how to calculate the symbol counts for each symbology, take
            // a look at http://docs.scandit.com/stable/c_api/symbologies.html.

            // Setup the barcode scanner
            BarcodePicker picker = new BarcodePicker(settings);

            picker.OverlayView.ShowToolBar(true);

            // Add delegates for the scan and cancel event. We keep references to the
            // delegates until the picker is no longer used as the delegates are softly
            // referenced and can be removed because of low memory.
            scanDelegate        = new PickerScanDelegate();
            picker.ScanDelegate = scanDelegate;

            cancelDelegate = new OverlayCancelDelegate(this, picker);
            picker.OverlayView.CancelDelegate = cancelDelegate;

            PresentViewController(picker, true, null);

            picker.StartScanning();
        }
コード例 #3
0
        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            // The scanning behavior of the barcode picker is configured through scan
            // settings. We start with empty scan settings and enable a generous set
            // of 1D symbologies. Matrix scan is currently only supported for 1D
            // symbologies, enabling 2D symbologies will result in unexpected results.
            // In your own apps, only enable the symbologies you actually need.
            ScanSettings settings            = ScanSettings.DefaultSettings();
            NSSet        symbologiesToEnable = new NSSet(
                Symbology.EAN13,
                Symbology.EAN8,
                Symbology.UPC12,
                Symbology.UPCE,
                Symbology.Code39,
                Symbology.Code128,
                Symbology.ITF
                );

            // Enable matrix scan and set the max number of barcodes that can be recognized per frame
            // to some reasonable number for your use case. The max number of codes per frame does not
            // limit the number of codes that can be tracked at the same time, it only limits the
            // number of codes that can be newly recognized per frame.
            settings.EnableSymbologies(symbologiesToEnable);
            settings.MatrixScanEnabled        = true;
            settings.MaxNumberOfCodesPerFrame = 10;
            settings.HighDensityModeEnabled   = true;

            // When matrix scan is enabled beeping/vibrating is often not wanted.
            BarcodePicker picker = new BarcodePicker(settings);

            picker.OverlayView.SetBeepEnabled(false);
            picker.OverlayView.SetVibrateEnabled(false);

            // Register a SBSScanDelegate delegate, in order to be notified about relevant events
            // (e.g. a successfully scanned bar code).
            scanDelegate        = new PickerScanDelegate();
            picker.ScanDelegate = scanDelegate;

            // Register a SBSProcessFrameDelegate delegate to be able to reject tracked codes.
            processFrameDelegate        = new PickerProcessFrameDelegate();
            picker.ProcessFrameDelegate = processFrameDelegate;

            AddChildViewController(picker);
            picker.View.Frame = View.Bounds;
            Add(picker.View);
            picker.DidMoveToParentViewController(this);

            picker.OverlayView.GuiStyle = GuiStyle.MatrixScan;

            picker.StartScanning();
        }
コード例 #4
0
        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            // The scanning behavior of the barcode picker is configured through scan
            // settings. We start with empty scan settings and enable a very generous
            // set of symbologies. In your own apps, only enable the symbologies you
            // actually need.
            ScanSettings settings            = ScanSettings.DefaultSettings();
            NSSet        symbologiesToEnable = new NSSet(
                Symbology.EAN13,
                Symbology.EAN8,
                Symbology.UPC12,
                Symbology.UPCE,
                Symbology.Datamatrix,
                Symbology.QR,
                Symbology.Code39,
                Symbology.Code128,
                Symbology.ITF
                );

            settings.EnableSymbologies(symbologiesToEnable);

            // Enable and set the restrict active area. This will make sure that codes are only scanned in a very thin band in the center of the image.
            settings.SetActiveScanningArea(new CoreGraphics.CGRect(0, 0.48, 1, 0.04));

            // Setup the barcode scanner
            picker = new BarcodePicker(settings);
            picker.OverlayView.ShowToolBar(false);

            // Add delegate for the scan event. We keep references to the
            // delegates until the picker is no longer used as the delegates are softly
            // referenced and can be removed because of low memory.
            scanDelegate        = new PickerScanDelegate();
            picker.ScanDelegate = scanDelegate;

            AddChildViewController(picker);
            picker.View.Frame = View.Bounds;
            Add(picker.View);
            picker.DidMoveToParentViewController(this);

            // Modify the GUI style to have a "laser" line instead of a square viewfinder.
            picker.OverlayView.GuiStyle = GuiStyle.Laser;

            // Start scanning in paused state.
            picker.StartScanning(true);

            showAimAndScanButton();
        }