swift版二维码扫描和生成
http://download.csdn.net/detail/koocui/9857846
类扩展
import UIKit
extension UIViewController{
func showAlert(title:String,message:String,handler:@escaping((UIAlertAction)->Void)){
let alert:UIAlertController =UIAlertController(title: title, message: message, preferredStyle: .alert)
let action:UIAlertAction =UIAlertAction(title: "确定", style: .default, handler: handler)
alert.addAction(action)
self.present(alert, animated:true, completion: nil)
}
}
一，二维码扫描；
1，扫描页面上面的View
//
// MaskView.swift
// 二维码
//
// Created by CJW on 17/5/26.
// Copyright © 2017年 cjw. All rights reserved.
//
import UIKit
class MaskView: UIView {
var lineLayer:CALayer? =nil
// Only override draw() if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
overridefunc draw(_ rect:CGRect) {
let width:CGFloat = rect.size.width
let height:CGFloat = rect.size.height
let pickingFieldWIdth:CGFloat =300
let pickingFieldHeight:CGFloat =300
let contextRef =UIGraphicsGetCurrentContext()
contextRef!.saveGState()
//蒙版
contextRef?.setFillColor(red:0, green: 0, blue:0, alpha: 0.35)
contextRef?.setLineWidth(3)
let pickingFIeldRect =CGRect(x: (width - pickingFieldWIdth) /2, y: (height - pickingFieldHeight) /2, width: pickingFieldWIdth, height: pickingFieldHeight)
let pickingFieldPath =UIBezierPath(rect: pickingFIeldRect)
let bezierPathRect =UIBezierPath(rect: rect)
//填充使用奇偶法则
bezierPathRect.usesEvenOddFillRule =true
bezierPathRect.fill()
contextRef?.setLineWidth(2)
//框框
contextRef?.setStrokeColor(red:27/255.0, green:181/255.0, blue:254/255.0, alpha:1)
pickingFieldPath.stroke()
contextRef?.restoreGState()
self.layer.contentsGravity =kCAGravityCenter
}
overridefunc awakeFromNib() {
super.awakeFromNib()
self.backgroundColor =UIColor.black.withAlphaComponent(0.4)
self.lineLayer =CALayer(layer: layer)
self.lineLayer?.contents =UIImage(named: "line")?.cgImage
self.layer.addSublayer(self.lineLayer!)
self.resumeAnimation()
NotificationCenter.default.addObserver(self, selector: #selector(resumeAnimation), name:NSNotification.Name.UIApplicationDidBecomeActive, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(stopAnimation), name:NSNotification.Name.UIApplicationDidEnterBackground, object: nil)
}
overridefunc layoutSubviews() {
super.layoutSubviews()
self.setNeedsDisplay()
self.lineLayer?.frame =CGRect(x: (self.frame.size.width - 300) / 2, y: (self.frame.size.height - 300) / 2, width:300, height: 2)
}
func stopAnimation(){
self.lineLayer?.removeAnimation(forKey:"translationY")
}
func resumeAnimation(){
let basic =CABasicAnimation(keyPath:"transform.translation.y")
basic.fromValue = (0)
basic.toValue = (300)
basic.duration =1.5
basic.repeatCount =Float(NSIntegerMax)
self.lineLayer?.add(basic, forKey:"translationY")
}
}
2，扫描二维码的VC
//
// ScanViewController.swift
// 二维码
//
// Created by CJW on 17/5/26.
// Copyright © 2017年 cjw. All rights reserved.
// 扫描二维码
import UIKit
import AVFoundation
class ScanViewController:UIViewController,AVCaptureMetadataOutputObjectsDelegate {
var flashOpen:Bool? =nil
privatelazy var session:AVCaptureSession = {
//获取摄像设备
let device:AVCaptureDevice =AVCaptureDevice.defaultDevice(withMediaType:AVMediaTypeVideo)
//创建输入流
var input:AVCaptureDeviceInput?
do {
let myinput:AVCaptureDeviceInput=tryAVCaptureDeviceInput(device: device)
input = myinput
}catchlet error asNSError{
print(error)
}
//创建输出流
let output:AVCaptureMetadataOutput =AVCaptureMetadataOutput()
output.setMetadataObjectsDelegate(self, queue:DispatchQueue.main)
//设置扫描区域的比例
let width =300 / self.view.bounds.height
let height =300 / self.view.bounds.width
output.rectOfInterest =CGRect(x: (1-width)/2, y: (1-height) / 2, width: width, height: height)
let session1 =AVCaptureSession()
//高质量采集率
session1.canSetSessionPreset(AVCaptureSessionPresetHigh)
session1.addInput(input)
session1.addOutput(output)
//设置扫码支持的编码格式(这里设置条形码和二维码兼容)
output.metadataObjectTypes = [AVMetadataObjectTypeQRCode,AVMetadataObjectTypeEAN13Code,AVMetadataObjectTypeEAN8Code,AVMetadataObjectTypeCode128Code]
return session1
}()
overridefunc viewDidLoad() {
super.viewDidLoad()
self.navigationItem.rightBarButtonItem =UIBarButtonItem(title: "打开闪光灯", style: .plain, target:self, action: #selector(rightBarButtonDidClick))
let layer:AVCaptureVideoPreviewLayer =AVCaptureVideoPreviewLayer(session:session)
layer.videoGravity =AVLayerVideoGravityResizeAspectFill
layer.frame =self.view.layer.bounds
self.view.layer.insertSublayer(layer, at: 0)
}
overridefunc viewWillAppear(_ animated:Bool) {
super.viewWillAppear(animated)
self.session.startRunning()
}
overridefunc viewWillDisappear(_ animated:Bool) {
super.viewWillDisappear(animated)
self.session.stopRunning()
}
overridefunc didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//MARK: - AVCaptureMetadataOutputObjectsDelegate
func captureOutput(_ captureOutput:AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection:AVCaptureConnection!) {
if metadataObjects.count >0 {
self.session.stopRunning()
let metadataObject:AVMetadataMachineReadableCodeObject = metadataObjects.firstas! AVMetadataMachineReadableCodeObject
self.showAlert(title:"扫面结果", message: metadataObject.stringValue, handler: { (ht) in
self.session.startRunning()
})
}
}
}
//打开闪光灯
extension ScanViewController {
func rightBarButtonDidClick(btn:UIBarButtonItem){
self.flashOpen =!self.flashOpen!
let device:AVCaptureDevice =AVCaptureDevice.defaultDevice(withMediaType:AVMediaTypeAudio)
if device.hasTorch&& device.hasFlash {
ifself.flashOpen! {
self.navigationItem.rightBarButtonItem =UIBarButtonItem(title: "关闭闪光灯", style: .plain, target:self, action: #selector(rightBarButtonDidClick))
}
device.torchMode =AVCaptureTorchMode.on
device.flashMode =AVCaptureFlashMode.on
}else {
self.navigationItem.rightBarButtonItem =UIBarButtonItem(title: "打开闪光灯", style: .plain, target:self, action: #selector(rightBarButtonDidClick))
device.torchMode =AVCaptureTorchMode.off
device.flashMode =AVCaptureFlashMode.off
}
}
}
//
// ImageViewController.swift
// 二维码
//
// Created by CJW on 17/5/26.
// Copyright © 2017年 cjw. All rights reserved.
// 长按识别二维码
import UIKit
class ImageViewController:UIViewController,UINavigationControllerDelegate,UIImagePickerControllerDelegate{
@IBOutletweak var imageView:UIImageView!
overridefunc viewDidLoad() {
super.viewDidLoad()
self.navigationItem.rightBarButtonItem =UIBarButtonItem(title: "从相册获取", style:UIBarButtonItemStyle.plain, target:self, action: #selector(rightBarBtnItemClick(item:)))
}
overridefunc didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//MARK:- 从相册选择
func rightBarBtnItemClick(item:UIBarButtonItem){
ifUIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) {
let controller =UIImagePickerController()
controller.sourceType =UIImagePickerControllerSourceType.photoLibrary
controller.delegate =self
self.present(controller, animated:true, completion: {
})
}else {
self.showAlert(title:"提示", message:"设备不支持访问相册", handler: { (text)in
})
}
}
//MARK:- UIImagePickerControllerDeleGate
func imagePickerController(_ picker:UIImagePickerController, didFinishPickingMediaWithInfo info: [String :Any]) {
picker.dismiss(animated:true) {
let image = info[UIImagePickerControllerOriginalImage]
self.imageView.image = imageas! UIImage?
}
}
//MARK:- 长按识别二维码
@IBActionfunc handleLongPress(_ sender:UILongPressGestureRecognizer) {
if sender.state ==UIGestureRecognizerState.began {
self.findQRCodeFromImage(image:self.imageView.image!)
}
}
//
func findQRCodeFromImage(image:UIImage){
let detector:CIDetector =CIDetector(ofType:CIDetectorTypeQRCode, context:nil, options: [CIDetectorAccuracy:CIDetectorAccuracyHigh])!
let faetures = detector.features(in:CIImage(cgImage: image.cgImage!))
if faetures.count >=1 {
let feature:CIQRCodeFeature = faetures.firstas! CIQRCodeFeature
self.showAlert(title:"扫描结果", message: feature.messageString!, handler: { (alert) in
})
}else {
self.showAlert(title:"提示", message:"图片里没有二维码", handler: { (alert)in
})
}
}
}
三，识别图片二维码；
//
// CreateViewController.swift
// 二维码
//
// Created by CJW on 17/5/26.
// Copyright © 2017年 cjw. All rights reserved.
// 生成二维码
import UIKit
import CoreFoundation
private let kRandomColor =UIColor.creatColor(r:CGFloat(arc4random_uniform(255)), g:CGFloat(arc4random_uniform(255)), b:CGFloat(arc4random_uniform(255)))
private let qrImageSize =CGSize(width: 300, height:300)
class CreateViewController:UIViewController,UITextFieldDelegate {
@IBOutletweak var textFiled:UITextField!
@IBOutletweak var imageView:UIImageView!
overridefunc viewDidLoad() {
super.viewDidLoad()
self.imageView.image = self.createQRImageWithString("小崔哥", andSize: qrImageSize)
}
func textFieldShouldReturn(_ textField:UITextField) -> Bool {
self.createButtonDidClick(UIButton())
returntrue
}
//MARK:- methods
@IBActionfunc createButtonDidClick(_ sender:UIButton) {
self.textFiled.resignFirstResponder()
if (self.textFiled.text?.characters.count)! > 0 {
self.imageView.image =self.createQRImageWithString(self.textFiled.text!, andSize: qrImageSize)
}else {
self.showAlert(title:"提示", message:"请先输入文字", handler: { (alter)in
})
}
}
//为二维码改变颜色
@IBActionfunc changeColorButtonDidClick(_ sender:UIButton) {
let image =self.createQRImageWithString(self.textFiled.text!, andSize: qrImageSize)
self.imageView.image =self.changeColorForQRImage(iamge: image, backColor:kRandomColor, frontColor:kRandomColor)
}
@IBActionfunc addSamllImageButtonDidClick(_ sender:UIButton) {
self.imageView.image =self.addSmallImageForQRImage(qrImage:self.imageView.image!)
}
func createQRImageWithString(_ stirng:String,andSize size:CGSize)->UIImage{
let stringData:Data = stirng.data(using:String.Encoding(rawValue:String.Encoding.utf8.rawValue))!
let qrFileter =CIFilter(name: "CIQRCodeGenerator")
qrFileter?.setValue(stringData, forKey:"inputMessage")
qrFileter?.setValue("M", forKey:"inputCorrectionLevel")
let qrImage = qrFileter?.outputImage
//放大并绘制二维码（上面生成的二维码很小需要放大）
let cgImage =CIContext(options: nil).createCGImage(qrImage!, from: (qrImage?.extent)!)
UIGraphicsBeginImageContext(size)
let context =UIGraphicsGetCurrentContext()
context!.interpolationQuality = .none
//反转一下图片，不然生产的QRCode就是上下颠倒的
context!.scaleBy(x:1.0, y: -1.0);
context?.draw(cgImage!, in: context!.boundingBoxOfClipPath)
let condeImage:UIImage =UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return condeImage
}
//改变二维码颜色
func changeColorForQRImage(iamge:UIImage,backColor:UIColor,frontColor:UIColor)->UIImage{
let colorFilter =CIFilter(name: "CIFalseColor", withInputParameters: ["inputImage":CIImage.init(cgImage:iamge.cgImage!),"inputColor0":CIColor(cgColor: frontColor.cgColor),"inputColor1":CIColor(cgColor: backColor.cgColor)])
returnUIImage(ciImage: (colorFilter?.outputImage)!)
}
//在二维码中心加个小图
func addSmallImageForQRImage(qrImage:UIImage) ->UIImage {
UIGraphicsBeginImageContext(qrImage.size)
qrImage.draw(in:CGRect(x: 0, y:0, width: qrImage.size.width, height: qrImage.size.height))
let iamge =UIImage(named: "small")
let iamgeW:CGFloat =50
let iamgeX = (qrImage.size.width - iamgeW)*0.5
let iamgeY = (qrImage.size.height - iamgeW)*0.5
iamge?.draw(in:CGRect(x: iamgeX, y: iamgeY, width: iamgeW, height: iamgeW))
let result =UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return result!
}
overridefunc didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
overridefunc touchesBegan(_ touches:Set<UITouch>, with event:UIEvent?) {
// self.textFiled.becomeFirstResponder()
self.view.endEditing(true)
}
}
extension UIColor{
classfunc creatColor(r:CGFloat, g:CGFloat, b:CGFloat)->UIColor {
returnUIColor(red: (r)/255.0 , green: (g)/255.0 , blue: (b)/255.0 , alpha: 1.0)
}
}
demo下载地址为：http://download.csdn.net/detail/koocui/9857846