QR / Barcode Scanner
QR / Barcode Scanner recognizes QR / Barcode.
Create Instants
Start / Stop Scanner
Use Scanning Information
Create Instants
>QR_BarcodeViewController.swift
var cameraDevice:MasCameraDevice = MasCameraDevice() var trackingManager:MasTrackerManager = MasTrackerManager()
Start / Stop Scanner
To start / stop Scanner, refer to the following code.
>QR_BarcodeViewController.swift
@objc func resumeAR()
{
...
trackingManager.start(.TRACKER_TYPE_CODE_SCANNER)
}
@objc func pauseAR()
{
trackingManager.stopTracker()
...
}
Use Scanning Information
When you illuminate QR / Barcode, the code name is displayed on the screen. Refer to the following code to use the scanning information.
You must be used Convert Matrix for Metal.('metalMatrixConverter')
>QR_BarcodeViewController.swift
func draw(in view: MTKView) {
...
let backgroundImage:MasTrackedImage = trackingState.getImage()
var backgroundProjectionMatrix:matrix_float4x4 = cameraDevice.getBackgroundPlaneProjectionMatrix()
let metalMatrixConverter:matrix_float4x4 = getScaleMatrix(1.0, y: -1.0, z: 1.0)
backgroundProjectionMatrix = backgroundProjectionMatrix * metalMatrixConverter
if let cameraQuad = backgroundCameraQuad {
cameraQuad.setProjectionMatrix(projectionMatrix: backgroundProjectionMatrix)
cameraQuad.draw(commandEncoder: commandEncoder, image: backgroundImage)
}
let codeScanResult:String = trackingState.getCodeScanResult()
if codeScanResult != "" {
let objectData:Data = codeScanResult.data(using: String.Encoding.utf8)!
let json = try! JSONSerialization.jsonObject(with: objectData, options: JSONSerialization.ReadingOptions.mutableContainers) as! [String: String]
self.formatLabel.text = json["Format"]
self.codeLabel.text = json["Value"]
trackingManager.stopTracker()
self.scanButton.alpha = 1.0
self.scanButton.isEnabled = true
self.scanButton.setTitle("Start Scan", for: .normal)
}
...
}
