LBXScanViewController.swift
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//
// LBXScanViewController.swift
// swiftScan
//
// Created by lbxia on 15/12/8.
// Copyright © 2015年 xialibing. All rights reserved.
//
import UIKit
import Foundation
import AVFoundation
public protocol LBXScanViewControllerDelegate: class {
func scanFinished(scanResult: LBXScanResult, error: String?)
}
public protocol QRRectDelegate {
func drawwed()
}
open class LBXScanViewController: UIViewController {
// 返回扫码结果，也可以通过继承本控制器，改写该handleCodeResult方法即可
open weak var scanResultDelegate: LBXScanViewControllerDelegate?
open var delegate: QRRectDelegate?
open var scanObj: LBXScanWrapper?
open var scanStyle: LBXScanViewStyle? = LBXScanViewStyle()
open var qRScanView: LBXScanView?
// 启动区域识别功能
open var isOpenInterestRect = false
//连续扫码
open var isSupportContinuous = false;
// 识别码的类型
public var arrayCodeType: [AVMetadataObject.ObjectType]?
// 是否需要识别后的当前图像
public var isNeedCodeImage = false
// 相机启动提示文字
public var readyString: String! = "loading"
open override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
// [self.view addSubview:_qRScanView];
view.backgroundColor = UIColor.black
edgesForExtendedLayout = UIRectEdge(rawValue: 0)
}
open func setNeedCodeImage(needCodeImg: Bool) {
isNeedCodeImage = needCodeImg
}
// 设置框内识别
open func setOpenInterestRect(isOpen: Bool) {
isOpenInterestRect = isOpen
}
open override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
drawScanView()
perform(#selector(LBXScanViewController.startScan), with: nil, afterDelay: 0.3)
}
@objc open func startScan() {
if scanObj == nil {
var cropRect = CGRect.zero
if isOpenInterestRect {
cropRect = LBXScanView.getScanRectWithPreView(preView: view, style: scanStyle!)
}
// 指定识别几种码
if arrayCodeType == nil {
arrayCodeType = [AVMetadataObject.ObjectType.qr as NSString,
AVMetadataObject.ObjectType.ean13 as NSString,
AVMetadataObject.ObjectType.code128 as NSString] as [AVMetadataObject.ObjectType]
}
scanObj = LBXScanWrapper(videoPreView: view,
objType: arrayCodeType!,
isCaptureImg: isNeedCodeImage,
cropRect: cropRect,
success: { [weak self] (arrayResult) -> Void in
guard let strongSelf = self else {
return
}
// 停止扫描动画
strongSelf.qRScanView?.stopScanAnimation()
strongSelf.handleCodeResult(arrayResult: arrayResult)
})
}
scanObj?.supportContinuous = isSupportContinuous;
// 结束相机等待提示
qRScanView?.deviceStopReadying()
// 开始扫描动画
qRScanView?.startScanAnimation()
// 相机运行
scanObj?.start()
}
open func drawScanView() {
if qRScanView == nil {
qRScanView = LBXScanView(frame: view.frame, vstyle: scanStyle!)
view.addSubview(qRScanView!)
delegate?.drawwed()
}
qRScanView?.deviceStartReadying(readyStr: readyString)
}
/**
处理扫码结果，如果是继承本控制器的，可以重写该方法,作出相应地处理，或者设置delegate作出相应处理
*/
open func handleCodeResult(arrayResult: [LBXScanResult]) {
guard let delegate = scanResultDelegate else {
fatalError("you must set scanResultDelegate or override this method without super keyword")
}
if !isSupportContinuous {
navigationController?.popViewController(animated: true)
}
if let result = arrayResult.first {
delegate.scanFinished(scanResult: result, error: nil)
} else {
let result = LBXScanResult(str: nil, img: nil, barCodeType: nil, corner: nil)
delegate.scanFinished(scanResult: result, error: "no scan result")
}
}
open override func viewWillDisappear(_ animated: Bool) {
NSObject.cancelPreviousPerformRequests(withTarget: self)
qRScanView?.stopScanAnimation()
scanObj?.stop()
}
@objc open func openPhotoAlbum() {
LBXPermissions.authorizePhotoWith { [weak self] _ in
let picker = UIImagePickerController()
picker.sourceType = UIImagePickerController.SourceType.photoLibrary
picker.delegate = self
picker.allowsEditing = true
self?.present(picker, animated: true, completion: nil)
}
}
}
//MARK: - 图片选择代理方法
extension LBXScanViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
//MARK: -----相册选择图片识别二维码 （条形码没有找到系统方法）
public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
picker.dismiss(animated: true, completion: nil)
let editedImage = info[UIImagePickerController.InfoKey.editedImage] as? UIImage
let originalImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
guard let image = editedImage ?? originalImage else {
showMsg(title: nil, message: NSLocalizedString("Identify failed", comment: "Identify failed"))
return
}
let arrayResult = LBXScanWrapper.recognizeQRImage(image: image)
if !arrayResult.isEmpty {
handleCodeResult(arrayResult: arrayResult)
}
}
}
//MARK: - 私有方法
private extension LBXScanViewController {
func showMsg(title: String?, message: String?) {
let alertController = UIAlertController(title: nil, message: message, preferredStyle: .alert)
let alertAction = UIAlertAction(title: NSLocalizedString("OK", comment: "OK"), style: .default, handler: nil)
alertController.addAction(alertAction)
present(alertController, animated: true, completion: nil)
}
}