Ios 自定义条形码扫描仪，轻按至焦点
请参考以下问题： 上面的链接很旧，已经过时了。我试图使用上面提供的答案，但没有用。。。下面是我对他们的尝试 我需要在读取条形码时点击屏幕，以实现对视图中对象的聚焦 这是我的代码尝试Ios 自定义条形码扫描仪，轻按至焦点,ios,swift,barcode-scanner,Ios,Swift,Barcode Scanner,请参考以下问题： 上面的链接很旧，已经过时了。我试图使用上面提供的答案，但没有用。。。下面是我对他们的尝试 我需要在读取条形码时点击屏幕，以实现对视图中对象的聚焦 这是我的代码尝试 var captureDevice: AVCaptureDevice? //capture device Is this right? override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { l
var captureDevice: AVCaptureDevice? //capture device Is this right?
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
let screenSize = videoPreviewLayer!.bounds.size
if let touchPoint = touches.first {
let x = touchPoint.location(in: self.view).y / screenSize.height
let y = 1.0 - touchPoint.location(in: self.view).x / screenSize.width
let focusPoint = CGPoint(x: x, y: y)
if let device = captureDevice {
do {
try device.lockForConfiguration()
device.focusPointOfInterest = focusPoint
//device.focusMode = .continuousAutoFocus
device.focusMode = .autoFocus
//device.focusMode = .locked
device.exposurePointOfInterest = focusPoint
device.exposureMode = AVCaptureDevice.ExposureMode.continuousAutoExposure
device.unlockForConfiguration()
}
catch {
// just ignore
}
}
}
}
var captureDevice:AVCaptureDevice//捕获设备是这样吗？
覆盖func TouchesBegind（Touchs:Set，带有事件：UIEvent？）{
让screenSize=videoPreviewLayer！.bounds.size
如果让touchPoint=touchs.first{
设x=接触点。位置（在：self.view中）。y/屏幕大小。高度
设y=1.0-接触点位置（in:self.view）.x/screenSize.width
设focusPoint=CGPoint（x:x，y:y）
如果let device=captureDevice{
做{
请尝试device.lockForConfiguration（）
device.focusPointOfInterest=焦点点
//device.focusMode=.continuousAutoFocus
device.focusMode=.autoFocus
//device.focusMode=.locked
device.exposurePointOfInterest=焦点点
device.exposureMode=AVCaptureDevice.exposureMode.continuousAutoExposure
device.unlockForConfiguration（）
}
抓住{
//不管
}
}
}
}
import UIKit
import AVFoundation
class BarcodeScanVC: UIViewController {
struct GlobalVariable{
static var senderTags = 0
}
var captureSession = AVCaptureSession()
var videoPreviewLayer: AVCaptureVideoPreviewLayer?
var qrCodeFrameView: UIView?
var row = 0
var senderTag = 0
var waybillData: String = ""
var diagnosticErrorCodeData: String = ""
var hddSerialNumberData: String = ""
var scanRectView: UIView?
var delegate: BarcodeScanDelegate?
var captureDevice: AVCaptureDevice?
private let supportedCodeTypes = [AVMetadataObject.ObjectType.upce,
AVMetadataObject.ObjectType.code39,
AVMetadataObject.ObjectType.code39Mod43,
AVMetadataObject.ObjectType.code93,
AVMetadataObject.ObjectType.code128,
AVMetadataObject.ObjectType.ean8,
AVMetadataObject.ObjectType.ean13,
AVMetadataObject.ObjectType.aztec,
AVMetadataObject.ObjectType.pdf417,
AVMetadataObject.ObjectType.itf14,
AVMetadataObject.ObjectType.dataMatrix,
AVMetadataObject.ObjectType.interleaved2of5,
AVMetadataObject.ObjectType.qr]
override func viewDidLoad() {
super.viewDidLoad()
// Get the back-facing camera for capturing videos
//let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInDualCamera], mediaType: AVMediaType.video, position: .back)
let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInWideAngleCamera], mediaType: AVMediaType.video, position: .back)
guard let captureDevice = deviceDiscoverySession.devices.first else {
print("Failed to get the camera device")
return
}
do {
// Get an instance of the AVCaptureDeviceInput class using the previous device object.
let input = try AVCaptureDeviceInput(device: captureDevice)
// Set the input device on the capture session.
captureSession.addInput(input)
// Initialize a AVCaptureMetadataOutput object and set it as the output device to the capture session.
let captureMetadataOutput = AVCaptureMetadataOutput()
captureSession.addOutput(captureMetadataOutput)
// Set delegate and use the default dispatch queue to execute the call back
captureMetadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
captureMetadataOutput.metadataObjectTypes = supportedCodeTypes
// captureMetadataOutput.metadataObjectTypes = [AVMetadataObject.ObjectType.qr]
} catch {
// If any error occurs, simply print it out and don't continue any more.
print(error)
return
}
captureSession.commitConfiguration()
// Initialize the video preview layer and add it as a sublayer to the viewPreview view's layer.
videoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
videoPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
videoPreviewLayer?.frame = view.layer.bounds
//videoPreviewLayer?.frame
// let height: CGFloat = ((videoPreviewLayer?.frame.size.width)!)/2
// let width: CGFloat = ((videoPreviewLayer?.frame.size.width)!)/2
let height: CGFloat = (view.frame.size.height)/2
let width: CGFloat = (view.frame.size.width) - 200
let path = UIBezierPath()
//Corner1
path.move(to: CGPoint(x: 5, y: 50))
path.addLine(to: CGPoint(x: 5, y: 5))
path.addLine(to: CGPoint(x: 50, y: 5))
//Corner2
path.move(to: CGPoint(x: height - 55, y: 5))
path.addLine(to: CGPoint(x: height - 5, y: 5))
path.addLine(to: CGPoint(x: height - 5, y: 55))
//Corner3
path.move(to: CGPoint(x: 5, y: width - 55))
path.addLine(to: CGPoint(x: 5, y: width - 5))
path.addLine(to: CGPoint(x: 55, y: width - 5))
//Corner4 -bottom right
path.move(to: CGPoint(x: height - 5, y: width - 55))
path.addLine(to: CGPoint(x: height - 5, y: width - 5))
path.addLine(to: CGPoint(x: height - 55, y: width - 5))
let shape = CAShapeLayer()
shape.path = path.cgPath
shape.strokeColor = UIColor.white.cgColor
shape.lineWidth = 5
shape.frame.origin.x = 20
shape.frame.origin.y = 180
shape.fillColor = UIColor.clear.cgColor
videoPreviewLayer?.addSublayer(shape)
view.layer.addSublayer(videoPreviewLayer!)
//videoPreviewLayer?.anchorPoint.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
//view.layer.addSublayer(scanRectView)
// Start video capture.
captureSession.startRunning()
// Move the message label and top bar to the front
//view.bringSubview(toFront: messageLabel)
//view.bringSubview(toFront: topbar)
// Initialize QR Code Frame to highlight the QR code
qrCodeFrameView = UIView()
if let qrCodeFrameView = qrCodeFrameView {
qrCodeFrameView.layer.borderColor = UIColor.green.cgColor
qrCodeFrameView.layer.borderWidth = 2
view.addSubview(qrCodeFrameView)
view.bringSubviewToFront(qrCodeFrameView)
}
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
let screenSize = videoPreviewLayer!.bounds.size
if let touchPoint = touches.first {
let x = touchPoint.location(in: self.view).y / screenSize.height
let y = 1.0 - touchPoint.location(in: self.view).x / screenSize.width
let focusPoint = CGPoint(x: x, y: y)
if let device = captureDevice {
do {
try device.lockForConfiguration()
device.focusPointOfInterest = focusPoint
//device.focusMode = .continuousAutoFocus
device.focusMode = .autoFocus
//device.focusMode = .locked
device.exposurePointOfInterest = focusPoint
device.exposureMode = AVCaptureDevice.ExposureMode.continuousAutoExposure
device.unlockForConfiguration()
}
catch {
// just ignore
}
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func launchApp(barcodeScan: String) {
// if presentedViewController != nil {
// return
// }
guard presentedViewController == nil else {
return
}
let alertPrompt = UIAlertController(title: "Barcode Found", message: "\(barcodeScan)", preferredStyle: .actionSheet)
let confirmAction = UIAlertAction(title: "Confirm", style: UIAlertAction.Style.default, handler: { (action) -> Void in
if self.senderTag == 1 {
GlobalVariable.senderTags = 1
self.delegate?.didScan(barcodeData: barcodeScan)
self.navigationController?.popViewController(animated: true)
}
if self.senderTag == 2 {
GlobalVariable.senderTags = 2
self.delegate?.didScan(barcodeData: barcodeScan)
self.navigationController?.popViewController(animated: true)
}
if self.senderTag == 3 {
GlobalVariable.senderTags = 3
self.delegate?.didScan(barcodeData: barcodeScan)
self.navigationController?.popViewController(animated: true)
}
if self.senderTag != 1 && self.senderTag != 2 && self.senderTag != 3 {
let indexPath = IndexPath(row: self.row, section: 0)
let cell: PartsOrderRequestTableCell = globalPartsOrderRequestTableVC?.tableView.cellForRow(at: indexPath) as! PartsOrderRequestTableCell
cell.diagnosticCodeLabel.text = barcodeScan
cell.diagnosticCodeLabel.endEditing(true)
self.navigationController?.popViewController(animated: true)
//return
}
})
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: nil)
alertPrompt.addAction(confirmAction)
alertPrompt.addAction(cancelAction)
present(alertPrompt, animated: true, completion: nil)
}
}
extension BarcodeScanVC: AVCaptureMetadataOutputObjectsDelegate {
func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
// Check if the metadataObjects array is not nil and it contains at least one object.
if metadataObjects.count == 0 {
qrCodeFrameView?.frame = CGRect.zero
//messageLabel.text = "No QR code is detected"
return
}
// Get the metadata object.
let metadataObj = metadataObjects[0] as! AVMetadataMachineReadableCodeObject
if supportedCodeTypes.contains(metadataObj.type) {
// If the found metadata is equal to the QR code metadata (or barcode) then update the status label's text and set the bounds
let barCodeObject = videoPreviewLayer?.transformedMetadataObject(for: metadataObj)
qrCodeFrameView?.frame = barCodeObject!.bounds
if metadataObj.stringValue != nil {
launchApp(barcodeScan: metadataObj.stringValue!)
//messageLabel.text = metadataObj.stringValue
}
}
}
private func updatePreviewLayer(layer: AVCaptureConnection, orientation: AVCaptureVideoOrientation) {
layer.videoOrientation = orientation
videoPreviewLayer?.frame = self.view.bounds
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
if let connection = self.videoPreviewLayer?.connection {
let currentDevice: UIDevice = UIDevice.current
let orientation: UIDeviceOrientation = currentDevice.orientation
let previewLayerConnection : AVCaptureConnection = connection
if previewLayerConnection.isVideoOrientationSupported {
switch (orientation) {
case .portrait: updatePreviewLayer(layer: previewLayerConnection, orientation: .portrait)
break
case .landscapeRight: updatePreviewLayer(layer: previewLayerConnection, orientation: .landscapeLeft)
break
case .landscapeLeft: updatePreviewLayer(layer: previewLayerConnection, orientation: .landscapeRight)
break
case .portraitUpsideDown: updatePreviewLayer(layer: previewLayerConnection, orientation: .portraitUpsideDown)
break
default: updatePreviewLayer(layer: previewLayerConnection, orientation: .portrait)
break
}
}
}
}
}
导入UIKit
进口AVF基金会
类BarcodeScanVC:UIViewController{
结构全局变量{
静态变量senderTags=0
}
var captureSession=AVCaptureSession（）
var videoPreviewLayer:AVCaptureVideoPreviewLayer？
var qrCodeFrameView:UIView？
变量行=0
var senderTag=0
var waybillData:String=“”
var DiagnosticeErrorCodeData:String=“”
var hddSerialNumberData:String=“”
var scanRectView:UIView？
var代表：条码扫描门？
var captureDevice:AVCaptureDevice？
private let supportedCodeTypes=[AVMetadataObject.ObjectType.upce，
AVMetadataObject.ObjectType.code39，
AVMetadataObject.ObjectType.code39Mod43，
AVMetadataObject.ObjectType.code93，
AVMetadataObject.ObjectType.code128，
AVMetadataObject.ObjectType.ean8，
AVMetadataObject.ObjectType.ean13，
AVMetadataObject.ObjectType.aztec，
AVMetadataObject.ObjectType.pdf417，
AVMetadataObject.ObjectType.itf14，
AVMetadataObject.ObjectType.dataMatrix，
AVMetadataObject.ObjectType.Interleaved25，
AVMetadataObject.ObjectType.qr]
重写func viewDidLoad（）{
super.viewDidLoad（）
//获取背面摄像头以捕获视频
//let deviceDiscoverySession=AVCaptureDevice.DiscoverySession（设备类型：[.builtInDualCamera]，媒体类型：AVMediaType.video，位置：.back）
let deviceDiscoverySession=AVCaptureDevice.DiscoverySession（设备类型：[.builtInWideAngleCamera]，媒体类型：AVMediaType.video，位置：.back）
guard let captureDevice=deviceDiscoverySession.devices.first else{
打印（“获取相机设备失败”）
回来
}
做{
//使用前面的设备对象获取AVCaptureDeviceInput类的实例。
让输入=尝试AVCaptureDeviceInput（设备：captureDevice）
//在捕获会话上设置输入设备。
captureSession.addInput（输入）
//初始化AvCaptureMataOutput对象并将其设置为捕获会话的输出设备。
让captureMataOutput=avcaptureMataDataOutput（）
captureSession.addOutput（CaptureMataOutput）
//设置委托并使用默认调度队列执行回调
CaptureMataOutput.setMetadataObjectsDelegate（self，队列：DispatchQueue.main）
CaptureMataOutput.metadataObjectTypes=supportedCodeTypes
//CaptureMataOutput.metadataObjectTypes=[AVMetadataObject.ObjectType.qr]
}抓住{
//如果发生任何错误，只需打印出来，不再继续。
打印（错误）
回来
}
captureSession.commitConfiguration（）的配置
//初始化视频预览层并将其作为子层添加到viewPreview视图的层中。
videoPreviewLayer=AVCaptureVideoPreviewLayer（会话：captureSession）
videoPreviewLayer？.videoGravity=AVLayerVideoGravity.resizeAspectFill
videoPreviewLayer？.frame=view.layer.bounds
//videoPreviewLayer？.frame
//让高度：CGFloat=（（videoPreviewLayer？.frame.size.width）！）/2
//让宽度：CGFloat=（（videoPreviewLayer？.frame.size.width）！）/2
let height:CGFloat=（view.frame.size.height）/2
let width:CGFloat=（view.frame.size.width）-200
let path=UIBezierPath（）
//角落1
移动路径（到：CGPoint（x:5，y:50））
path.addLine（到：CGPoint（x:5，y:5））
路径添加线（到：CGPoint（x:50，y:5））
//角落2
移动路径（到：CGPoint（x:height-55，y:5））
path.addLine（到：CGPoint（x:height-5，y:5））
路径添加线（到：CGPoint（x:height-5，y:55））
//角落3
移动路径（到：CGPoint（x:5，y:width-55））
addLine（到：CGPoint（x:5，y:width-5））
路径添加线（到：CGPoint（x:55，y:width-5））
//拐角4-右下角
移动路径（到：CGPoint（x:height-5，y:width-55））
帕
if let device = captureDevice
guard let captureDevice = deviceDiscoverySession.devices.first else {
print("Failed to get the camera device")
return
}
captureDevice = deviceDiscoverySession.devices.first
override func viewDidLoad() {
super.viewDidLoad()
// Get the back-facing camera for capturing videos
//let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInDualCamera], mediaType: AVMediaType.video, position: .back)
let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInWideAngleCamera], mediaType: AVMediaType.video, position: .back)
captureDevice = deviceDiscoverySession.devices.first
if let captureDevice = captureDevice {
do {
// Get an instance of the AVCaptureDeviceInput class using the previous device object.
let input = try AVCaptureDeviceInput(device: captureDevice)
// Set the input device on the capture session.
captureSession.addInput(input)
// Initialize a AVCaptureMetadataOutput object and set it as the output device to the capture session.
let captureMetadataOutput = AVCaptureMetadataOutput()
captureSession.addOutput(captureMetadataOutput)
// Set delegate and use the default dispatch queue to execute the call back
captureMetadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
captureMetadataOutput.metadataObjectTypes = supportedCodeTypes
// captureMetadataOutput.metadataObjectTypes = [AVMetadataObject.ObjectType.qr]
} catch {
// If any error occurs, simply print it out and don't continue any more.
print(error)
return
}
}
..... Method cut short as no other changes.