git地址 https://github.com/wangxiaobai1840/NativeScan
在项目使用过程中有有一些新的改动，再次添加一下
修改: 1、修改聚焦模式 2、添加闪光灯开启与关闭方法
相机配置相关
self.scanDevice = AVCaptureDevice.default(for: .video)
do {
self.scanInput = try? AVCaptureDeviceInput(device: self.scanDevice!)
guard self.scanInput != nil else {
return
}
self.scanOutput = AVCaptureMetadataOutput()
self.scanOutput?.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
self.scanSession = AVCaptureSession()
if self.scanDevice?.supportsSessionPreset(AVCaptureSession.Preset.hd4K3840x2160) == true{
self.scanSession?.canSetSessionPreset(.high)
}else if scanDevice?.supportsSessionPreset(AVCaptureSession.Preset.hd4K3840x2160) == false{
if scanDevice?.supportsSessionPreset(AVCaptureSession.Preset.hd1920x1080) == true {
self.scanSession?.canSetSessionPreset(.hd1920x1080)
}else{
self.scanSession?.canSetSessionPreset(.hd1280x720)
}
}
if (self.scanSession?.canAddInput(self.scanInput!))! {
self.scanSession?.addInput(self.scanInput!)
}
if (self.scanSession?.canAddOutput(self.scanOutput!))! {
self.scanSession?.addOutput(self.scanOutput!)
}
self.scanOutput?.metadataObjectTypes = [
AVMetadataObject.ObjectType.qr,
AVMetadataObject.ObjectType.code39,
AVMetadataObject.ObjectType.code128,
AVMetadataObject.ObjectType.code39Mod43,
AVMetadataObject.ObjectType.code93,
AVMetadataObject.ObjectType.ean8,
AVMetadataObject.ObjectType.ean13
]
self.scanPreviewLayer = AVCaptureVideoPreviewLayer(session:self.scanSession!)
self.scanPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
self.scanPreviewLayer?.frame = self.view.layer.bounds
view.layer.insertSublayer(self.scanPreviewLayer!, at: 0)
if (self.scanDevice?.isFocusModeSupported(.autoFocus))! {
do{
try self.scanInput?.device.lockForConfiguration()
}catch{}
// 之前使用autoFocus自动聚焦，发现有时候聚焦不好的时候不会自动的持续聚焦，所以换为continuousAutoFocus ，这个方式可以在聚焦不清晰的时候自动的持续聚焦，知道清晰
// self.scanInput?.device.focusMode = .autoFocus // 自动聚焦
self.scanInput?.device.focusMode = .continuousAutoFocus // 持续自动聚焦
self.scanInput?.device.unlockForConfiguration()
}
if !(self.scanSession?.isRunning)! {
self.scanSession?.startRunning()
}
// 注意扫描区域设置要在扫描startRunning之后
self.scanOutput?.rectOfInterest =
(self.scanPreviewLayer?.metadataOutputRectConverted(fromLayerRect:self.scanRect()))! // 设置扫描区域
} catch {
return
}
界面相关
func createScanView(){
if scanBgView == nil {
self.scanBgView = UIView()
self.scanBgView?.frame = self.view.frame
self.scanBgView?.backgroundColor = UIColor.clear
self.view.addSubview(self.scanBgView!)
let topView = UIView()
topView.backgroundColor = UIColor.init(red: 0, green: 0, blue: 0, alpha: 0.4)
topView.frame = CGRect(x: 0, y: 0, width: KScreenWidth, height: (KScreenHeight - ALScanWidth)/2)
self.scanBgView?.addSubview(topView)
let leftView = UIView()
leftView.backgroundColor = UIColor.init(red: 0, green: 0, blue: 0, alpha: 0.4)
leftView.frame = CGRect(x: 0, y: ALScanViewY, width:ALScanViewX, height: ALScanWidth)
self.scanBgView?.addSubview(leftView)
let rightView = UIView()
rightView.backgroundColor = UIColor.init(red: 0, green: 0, blue: 0, alpha: 0.4)
rightView.frame = CGRect(x: ALScanViewX + ALScanWidth , y: ALScanViewY, width:ALScanViewX, height: ALScanWidth)
self.scanBgView?.addSubview(rightView)
let bottomView = UIView()
bottomView.backgroundColor = UIColor.init(red: 0, green: 0, blue: 0, alpha: 0.4)
bottomView.frame = CGRect(x: 0 , y: KScreenHeight - ALScanViewY, width:KScreenWidth, height: ALScanViewY)
self.scanBgView?.addSubview(bottomView)
let scanView = UIImageView.init(image: UIImage.init(named: "ticket_scan_border"))
scanView.backgroundColor = UIColor.clear
scanView.frame = scanRect()
self.scanBgView?.addSubview(scanView)
let noteButton = UIButton()
noteButton.setTitle("将二维码放入框内", for: .normal)
noteButton.layer.borderColor = UIColor.lightGray.cgColor
noteButton.layer.borderWidth = 0.5
noteButton.layer.cornerRadius = 12.5
noteButton.clipsToBounds = true
noteButton.titleLabel?.textAlignment = .center
noteButton.titleLabel?.font = UIFont.systemFont(ofSize: 12)
self.scanBgView?.addSubview(noteButton)
noteButton.frame = CGRect(x: (KScreenWidth - 126)/2, y: scanView.frame.maxY + 25, width: 126, height: 26)
if flashlight == nil {
flashlight = UIButton()
self.view.addSubview(flashlight)
flashlight.setImage(UIImage.init(named: "ticket_scan_flashlight_off"), for: .normal)
flashlight.setImage(UIImage.init(named: "ticket_scan_flashlight_on"), for: .selected)
flashlight.setTitleColor(UIColor.white, for: .normal)
flashlight.setTitleColor(UIColor.blue, for: .selected)
flashlight.setTitle("轻点照亮", for: .normal)
flashlight.imageView?.contentMode = .scaleAspectFill
flashlight.titleLabel?.font = UIFont.systemFont(ofSize: 12)
flashlight.imageEdgeInsets = UIEdgeInsetsMake(-20-8/2, 0, 0, -58)
flashlight.titleEdgeInsets = UIEdgeInsetsMake(46 + 8/2, (-16), 0, 0)
flashlight.isSelected = false
flashlight.addTarget(self, action: #selector(flashlightAction), for: .touchUpInside)
flashlight.frame = CGRect(x: (KScreenWidth - 58)/2 , y: noteButton.frame.maxY + 10 , width: 58, height: 74)
}
self.scanLineView = UIImageView.init(image: UIImage.init(named: "ticket_scan_line"))
self.scanLineView?.frame = CGRect(x: ALScanViewX + ALScanLineLeftAndRightMargin, y: ALScanViewY + 6 , width: ALScanWidth - ALScanLineLeftAndRightMargin*2, height: ALScanLineHeight)
self.scanBgView?.addSubview(self.scanLineView!)
}
if self.timer == nil {
timer = DispatchSource.makeTimerSource(flags: [], queue: DispatchQueue.main)
timer.schedule(deadline: .now(), repeating: 0.01)
timer.setEventHandler {
DispatchQueue.main.async {
if (self.scanLineView?.frame.origin.y)! + 1 > (KScreenHeight - ALScanViewY - ALScanLineHeight - 6*2){
self.scanLineView?.frame.origin.y = ALScanViewY + 6
}else{
self.scanLineView?.frame.origin.y += 1
}
}
}
}
self.timer.resume()
self.view.addSubview(self.scanBgView!)
self.view.sendSubview(toBack: self.scanBgView!)
}
打开闪光灯
// MARK: 手电筒开启关闭
@objc func flashlightAction(){
if (self.scanDevice?.hasTorch)! && (self.scanDevice?.isTorchAvailable)! {
// 注意在开启关闭闪光灯的时候要注意先要锁定设备
try? self.scanDevice?.lockForConfiguration()
if self.scanDevice?.torchMode == .off {
self.scanDevice?.torchMode = .on
self.flashlight.isSelected = true
} else {
self.scanDevice?.torchMode = .off
self.flashlight.isSelected = false
}
// 在设置完设备属性后要记得解锁设备
self.scanDevice?.unlockForConfiguration()
}
}