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();
}
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();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
contatinerView = new UIView(CGRect.Empty);
View.AddSubview(contatinerView);
freezeButton = new UIButton(CGRect.Empty);
freezeButton.SetTitle("Freeze", UIControlState.Normal);
freezeButton.SetBackgroundImage(UIImageExtensions.Brand.GetImage(), UIControlState.Normal);
freezeButton.TouchUpInside += (sender, e) =>
{
var scanning = picker.IsScanning();
if (scanning)
{
matrixScanHandler.Enabled = false;
picker.PauseScanning();
freezeButton.SetTitle("Done", UIControlState.Normal);
}
else
{
matrixScanHandler.RemoveAllAugmentations();
matrixScanHandler.Enabled = true;
picker.StartScanning();
freezeButton.SetTitle("Freeze", UIControlState.Normal);
}
};
View.AddSubview(freezeButton);
freezeButton.TranslatesAutoresizingMaskIntoConstraints = false;
contatinerView.TranslatesAutoresizingMaskIntoConstraints = false;
View.AddConstraints(new[]
{
contatinerView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
contatinerView.TopAnchor.ConstraintEqualTo(View.TopAnchor),
contatinerView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor),
contatinerView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
freezeButton.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor, 20),
freezeButton.BottomAnchor.ConstraintEqualTo(View.BottomAnchor, -20),
freezeButton.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor, -20),
freezeButton.HeightAnchor.ConstraintEqualTo(60)
});
var settings = ScanSettings.DefaultSettings();
settings.SetSymbologyEnabled(Symbology.EAN13, true);
settings.MatrixScanEnabled = true;
settings.MaxNumberOfCodesPerFrame = 15;
settings.HighDensityModeEnabled = true;
picker = new BarcodePicker(settings);
picker.OverlayView.GuiStyle = GuiStyle.None;
matrixScanHandler = new MatrixScanHandler(picker);
matrixScanHandler.ShouldReject += (matrixScanHandler, trackedBarcode) => false;
// This delegate method is called every time a new frame has been processed.
// In this case we use it to update the offset of the augmentation.
matrixScanHandler.DidProcess += (sender, e) =>
{
DispatchQueue.MainQueue.DispatchAsync(() =>
{
foreach (var item in e.Frame.TrackedCodes)
{
var offset = GetYOffSet(item.Value as TrackedBarcode);
viewBasedMatrixScanOverlay.SetOffset(offset, item.Key as NSNumber);
}
});
};
viewBasedMatrixScanOverlay = new ViewBasedMatrixScanOverlay();
// This method is called every time a new barcode has been tracked.
// You can implement this method to return the offset that will be used to position the augmentation
// with respect to the center of the tracked barcode.
viewBasedMatrixScanOverlay.OffsetForOverlay += (overlay, barcode, identifier) => GetYOffSet(barcode);
// This delegate method is called every time a new barcode has been tracked.
// You can implement this method to return the view that will be used as the augmentation.
viewBasedMatrixScanOverlay.ViewForOverlay += (overlay, barcode, identifier) =>
{
if (barcode.Data == null)
{
return(new UIView(CGRect.Empty));
}
var view = new StockView(new CGRect(0, 0, StockView.StandardWidth, StockView.StandardHeight));
var model = Model.MockedModel(barcode.Data);
view.AddGestureRecognizer(new UITapGestureRecognizer(() =>
{
var overlayViewController = new OverlayViewController
{
Model = model,
ModalTransitionStyle = UIModalTransitionStyle.CoverVertical,
ModalPresentationStyle = UIModalPresentationStyle.OverCurrentContext
};
PresentViewController(overlayViewController, false, null);
}));
view.Model = model;
return(view);
};
// Add a ViewBasedMatrixScanOverlay in order to have custom UIView instances as augmentations.
matrixScanHandler.AddOverlay(viewBasedMatrixScanOverlay);
simpleMatrixScanOverlay = new SimpleMatrixScanOverlay();
// This method is called every time a new barcode has been tracked.
// You can implement this method to customize the color of the highlight.
simpleMatrixScanOverlay.ColorForOverlay += (overlay, barcode, identifier) => Model.MockedColor(barcode.Data);
// Add a SimpleMatrixScanOverlay in order to highlight the barcodes.
matrixScanHandler.AddOverlay(simpleMatrixScanOverlay);
AddChildViewController(picker);
picker.View.Frame = contatinerView.Frame;
picker.View.AutoresizingMask = UIViewAutoresizing.FlexibleHeight | UIViewAutoresizing.FlexibleWidth;
contatinerView.AddSubview(picker.View);
picker.DidMoveToParentViewController(this);
picker.StartScanning();
}