Swift4.2 自定义相机:身份证拍照

效果图:

E7559627F62BB00925EAD4E1CDAA9C6A.jpg

使用示例

/ 身份证正面
@IBAction func frontClick(_ sender: Any) {
    let vc = DXIDCardCameraController.init(type: DXIDCardType.front)
    vc.delegate = self
    self.present(vc, animated: true, completion: nil)
}

// 身份证反面
@IBAction func reverseClick(_ sender: Any) {
    let vc = DXIDCardCameraController.init(type: DXIDCardType.reverse)
    vc.delegate = self
    self.present(vc, animated: true, completion: nil)
}


extension ViewController : DXIDCardCameraControllerProtocol {
    func cameraDidFinishShootWithCameraImage(image: UIImage) {
        self.imageView.image = image
    }
}

核心代码1:拍完照,沿着框框把图片进行裁剪,并修改了图片的方向

public func dx_clipImageInRect(rect: CGRect) -> UIImage?{
   
    let widthScale : CGFloat = self.size.width / kScreenW
    let heightScale : CGFloat = self.size.height / kScreenH
    
    //其实是横屏的
    let originWidth : CGFloat = rect.size.width
    let originHeight : CGFloat = rect.size.height
    
    
    let x : CGFloat = (kScreenH - originHeight) * 0.5 * heightScale
    let y : CGFloat = (kScreenW - originWidth) * 0.5 * widthScale
    let width : CGFloat = originHeight * heightScale
    let height : CGFloat = originWidth * widthScale
    
    let r : CGRect = CGRect.init(x: x, y: y, width: width, height: height)
    if let cgImg = self.cgImage?.cropping(to: r) {
        return UIImage.init(cgImage: cgImg, scale: 1.0, orientation: UIImage.Orientation.right)
    }

    return nil
}

真正使用照片的时候,再次修改照片的方向

let newImg = UIImage.init(cgImage: cgImg, scale: 1.0, orientation: UIImage.Orientation.up)

亮点:自动对焦,点击屏幕聚焦

@objc private func focusAtPoint(point : CGPoint) {
    let size = view.bounds.size
    let focusPoint = CGPoint.init(x: point.y/size.height, y: 1-point.x/size.width)
    if let device = device {
        do {
            try device.lockForConfiguration()
            if device.isFocusModeSupported(AVCaptureDevice.FocusMode.autoFocus) {
                device.focusPointOfInterest = focusPoint
                device.focusMode = .autoFocus
            }
            if device.isExposureModeSupported(AVCaptureDevice.ExposureMode.autoExpose){
                device.exposurePointOfInterest = focusPoint
                device.exposureMode = .autoExpose
            }
            device.unlockForConfiguration()
        } catch let error {
            print(error)
        }
    }
}

demo下载连接
Objective-C版本下载连接