VNDetectBarcodesRequestMBS.Constructor(DelegateHandler as VNRequestCompletedMBS = nil, tag as variant = nil)

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Vision	MBS MacFrameworks Plugin	19.4	✅ Yes	❌ No	❌ No	✅ Yes	All

The constructor.

When work is done, the optional delegate method is invoked to provide result on success or error on failure.

VNDetectBarcodesRequestMBS.setSymbologies(symbologies() as String)

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Vision	MBS MacFrameworks Plugin	19.4	✅ Yes	❌ No	❌ No	✅ Yes	All

Sets an array of symbologies that Vision should detect in the image.

Use this array to specify or restrict the types of symbols you want the Vision algorithm to detect. The default value leads Vision to scan for all possible symbologies.

Some examples using this method:

• /AVFoundation/Live Barcode Detection with Vision/Live Barcode Detection with Vision
• /MacFrameworks/Vision Object Detection/Vision Object Detection

VNDetectBarcodesRequestMBS.supportedSymbologies(byref error as NSErrorMBS) as String()

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Vision	MBS MacFrameworks Plugin	23.3	✅ Yes	❌ No	❌ No	✅ Yes	All

Obtain the collection of barcode symbologies that can be recognized by the request in its current configuration.

Calling this method could be a potentially expensive operation.
Returns an array of VNBarcodeSymbology strings describing the symbologies recognized by the request in its current configuration.
Requires macOS 12.0 or iOS 15.0 or newer.

See also:

• supportedSymbologies as String()

VNDetectBarcodesRequestMBS.symbologies as String()

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Vision	MBS MacFrameworks Plugin	19.4	✅ Yes	❌ No	❌ No	✅ Yes	All

An array of symbologies that Vision should detect in the image.

Use this array to specify or restrict the types of symbols you want the Vision algorithm to detect. The default value leads Vision to scan for all possible symbologies.

Some examples using this method:

• /AVFoundation/Live Barcode Detection with Vision/Live Barcode Detection with Vision
• /MacFrameworks/Vision Object Detection/Vision Object Detection