Swift4 二维码扫描 支持横竖屏切换
网上二维码扫描的轮子实在是太多了，为啥还要自己写呢？实在是因为没有找到合适的，找了十几二十个轮子， swift 、oc的都找了，全都不支持横竖屏切换，所以只能自己造了。这是一款使用Swift4编写的二维码扫描器，支持二维码/条形码的扫描，支持横竖屏切换，支持连续扫描，可识别框内，使用超简单，可扩展性强，很适合需要高度自定义小伙小姑凉们。
因为不太喜欢storyBoard、xib那一套，所以界面是纯手写的，所以很方便移植哈~
使用
代码地址：https://github.com/sunflowerseat/SwiftQRCode
先贴一下使用方法，实在太简单，就一个ViewController，根本懒得弄什么pod，直接把SwiftQRCodeVC拷贝过来用就ok了， 记得要给权限 Privacy - Camera Usage Description
备注：声音文件需要右键点击项目名称，add Files to "项目名称"，acc文件是无效的
扫描完成后，在func qrCodeCallBack(_ codeString : String?)方法中写回调 ，默认是连续扫描的
自定义
里面有些属性方便自定义
| 属性名称 | 属性含义 |
|---|---|
| scanAnimationDuration | 扫描时长 |
| needSound | 扫描结束是否需要播放声音 |
| scanWidth | 扫描框宽度 |
| scanHeight | 扫描框高度 |
| isRecoScanSize | 是否仅识别框内 |
| scanBoxImagePath | 扫描框图片 |
| scanLineImagePath | 扫描线图片 |
| soundFilePath | 声音文件 |
代码
//
// SwiftQRCodeVC.swift
//
// Created by fancy on 18/9/1.
// Copyright © 2018年 fancy. All rights reserved.
//
import UIKit
import AVFoundation
private let scanAnimationDuration = 3.0//扫描时长
private let needSound = true //扫描结束是否需要播放声音
private let scanWidth : CGFloat = 300 //扫描框宽度
private let scanHeight : CGFloat = 300 //扫描框高度
private let isRecoScanSize = true //是否仅识别框内
private let scanBoxImagePath = "QRCode_ScanBox" //扫描框图片
private let scanLineImagePath = "QRCode_ScanLine" //扫描线图片
private let soundFilePath = "noticeMusic.caf" //声音文件
class SwiftQRCodeVC: UIViewController{
var scanPane: UIImageView!///扫描框
var scanPreviewLayer : AVCaptureVideoPreviewLayer! //预览图层
var output : AVCaptureMetadataOutput!
var scanSession : AVCaptureSession?
lazy var scanLine : UIImageView = {
let scanLine = UIImageView()
scanLine.frame = CGRect(x: 0, y: 0, width: scanWidth, height: 3)
scanLine.image = UIImage(named: scanLineImagePath)
return scanLine
}()
override func viewDidLoad(){
super.viewDidLoad()
//初始化界面
self.initView()
//初始化ScanSession
setupScanSession()
}
override func viewWillAppear(_ animated: Bool){
super.viewWillAppear(animated)
startScan()
}
//初始化界面
func initView() {
scanPane = UIImageView()
scanPane.frame = CGRect(x: 300, y: 100, width: 400, height: 400)
scanPane.image = UIImage(named: scanBoxImagePath)
self.view.addSubview(scanPane)
//增加约束
addConstraint()
scanPane.addSubview(scanLine)
}
func addConstraint() {
scanPane.translatesAutoresizingMaskIntoConstraints = false
//创建约束
let widthConstraint = NSLayoutConstraint(item: scanPane, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 0, constant: scanWidth)
let heightConstraint = NSLayoutConstraint(item: scanPane, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 0, constant: scanHeight)
let centerX = NSLayoutConstraint(item: scanPane, attribute: .centerX, relatedBy: .equal, toItem: view, attribute: .centerX, multiplier: 1.0, constant: 0)
let centerY = NSLayoutConstraint(item: scanPane, attribute: .centerY, relatedBy: .equal, toItem: view, attribute: .centerY, multiplier: 1.0, constant: 0)
//添加多个约束
view.addConstraints([widthConstraint,heightConstraint,centerX,centerY])
}
//初始化scanSession
func setupScanSession(){
do{
//设置捕捉设备
let device = AVCaptureDevice.default(for: AVMediaType.video)!
//设置设备输入输出
let input = try AVCaptureDeviceInput(device: device)
let output = AVCaptureMetadataOutput()
output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
self.output = output
//设置会话
let scanSession = AVCaptureSession()
scanSession.canSetSessionPreset(.high)
if scanSession.canAddInput(input){
scanSession.addInput(input)
}
if scanSession.canAddOutput(output){
scanSession.addOutput(output)
}
//设置扫描类型(二维码和条形码)
output.metadataObjectTypes = [
.qr,
.code39,
.code128,
.code39Mod43,
.ean13,
.ean8,
.code93
]
//预览图层
let scanPreviewLayer = AVCaptureVideoPreviewLayer(session:scanSession)
scanPreviewLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
scanPreviewLayer.frame = view.layer.bounds
self.scanPreviewLayer = scanPreviewLayer
setLayerOrientationByDeviceOritation()
//保存会话
self.scanSession = scanSession
}catch{
//摄像头不可用
self.confirm(title: "温馨提示", message: "摄像头不可用", controller: self)
return
}
}
func setLayerOrientationByDeviceOritation() {
if(scanPreviewLayer == nil){
return
}
scanPreviewLayer.frame = view.layer.bounds
view.layer.insertSublayer(scanPreviewLayer, at: 0)
let screenOrientation = UIDevice.current.orientation
if(screenOrientation == .portrait){
scanPreviewLayer.connection?.videoOrientation = .portrait
}else if(screenOrientation == .landscapeLeft){
scanPreviewLayer.connection?.videoOrientation = .landscapeRight
}else if(screenOrientation == .landscapeRight){
scanPreviewLayer.connection?.videoOrientation = .landscapeLeft
}else if(screenOrientation == .portraitUpsideDown){
scanPreviewLayer.connection?.videoOrientation = .portraitUpsideDown
}else{
scanPreviewLayer.connection?.videoOrientation = .landscapeRight
}
//设置扫描区域
NotificationCenter.default.addObserver(forName: NSNotification.Name.AVCaptureInputPortFormatDescriptionDidChange, object: nil, queue: nil, using: { (noti) in
if(isRecoScanSize){
self.output.rectOfInterest = self.scanPreviewLayer.metadataOutputRectConverted(fromLayerRect: self.scanPane.frame)
}else{
self.output.rectOfInterest = CGRect(x: 0, y: 0, width: 1, height: 1)
}
})
}
//设备旋转后重新布局
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
setLayerOrientationByDeviceOritation()
}
//开始扫描
fileprivate func startScan(){
scanLine.layer.add(scanAnimation(), forKey: "scan")
guard let scanSession = scanSession else { return }
if !scanSession.isRunning
{
scanSession.startRunning()
}
}
//扫描动画
private func scanAnimation() -> CABasicAnimation{
let startPoint = CGPoint(x: scanLine .center.x , y: 1)
let endPoint = CGPoint(x: scanLine.center.x, y: scanHeight - 2)
let translation = CABasicAnimation(keyPath: "position")
translation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
translation.fromValue = NSValue(cgPoint: startPoint)
translation.toValue = NSValue(cgPoint: endPoint)
translation.duration = scanAnimationDuration
translation.repeatCount = MAXFLOAT
translation.autoreverses = true
return translation
}
//MARK: -
//MARK: Dealloc
deinit{
///移除通知
NotificationCenter.default.removeObserver(self)
}
}
//MARK: -
//MARK: AVCaptureMetadataOutputObjects Delegate
extension SwiftQRCodeVC : AVCaptureMetadataOutputObjectsDelegate
{
//扫描捕捉完成
func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
//停止扫描
self.scanLine.layer.removeAllAnimations()
self.scanSession!.stopRunning()
//播放声音
if(needSound){
self.playAlertSound()
}
//扫描完成
if metadataObjects.count > 0 {
if let resultObj = metadataObjects.first as? AVMetadataMachineReadableCodeObject{
self.confirm(title: "扫描结果", message: resultObj.stringValue, controller: self,handler: { (_) in
//继续扫描
self.startScan()
})
}
}
}
//弹出确认框
func confirm(title:String?,message:String?,controller:UIViewController,handler: ( (UIAlertAction) -> Swift.Void)? = nil){
let alertVC = UIAlertController(title: title, message: message, preferredStyle: .alert)
let entureAction = UIAlertAction(title: "确定", style: .destructive, handler: handler)
alertVC.addAction(entureAction)
controller.present(alertVC, animated: true, completion: nil)
}
//播放声音
func playAlertSound(){
guard let soundPath = Bundle.main.path(forResource: soundFilePath, ofType: nil) else { return }
guard let soundUrl = NSURL(string: soundPath) else { return }
var soundID:SystemSoundID = 0
AudioServicesCreateSystemSoundID(soundUrl, &soundID)
AudioServicesPlaySystemSound(soundID)
}
}总结
界面是有点粗制滥造哈~ 不过没关系啊，在initView里面稍微改改就可以变成你想要的了。
代码可能有更新，以github上的为准，
对代码有什么疑问，可以随时来问 ，秋秋邮箱：[email protected]