SwiftQRCode
SwiftQRCode copied to clipboard
Published
20 hours ago •
liufan321
liufan321
Not Working in Swift 4..
Hi
Not Working in Swift 4.
`// // QRCode.swift // QRCode // // Created by 刘凡 on 15/5/15. // Copyright (c) 2015年 joyios. All rights reserved. //
import UIKit import AVFoundation
open class QRCode: NSObject, AVCaptureMetadataOutputObjectsDelegate {
/// corner line width
var lineWidth: CGFloat
/// corner stroke color
var strokeColor: UIColor
/// the max count for detection
var maxDetectedCount: Int
/// current count for detection
var currentDetectedCount: Int = 0
/// auto remove sub layers when detection completed
var autoRemoveSubLayers: Bool
/// completion call back
var completedCallBack: ((_ stringValue: String) -> ())?
/// the scan rect, default is the bounds of the scan view, can modify it if need
open var scanFrame: CGRect = CGRect.zero
/// init function
///
/// - returns: the scanner object
public override init() {
self.lineWidth = 4
self.strokeColor = UIColor.green
self.maxDetectedCount = 20
self.autoRemoveSubLayers = false
super.init()
}
/// init function
///
/// - parameter autoRemoveSubLayers: remove sub layers auto after detected code image
/// - parameter lineWidth: line width, default is 4
/// - parameter strokeColor: stroke color, default is Green
/// - parameter maxDetectedCount: max detecte count, default is 20
///
/// - returns: the scanner object
public init(autoRemoveSubLayers: Bool, lineWidth: CGFloat = 4, strokeColor: UIColor = UIColor.green, maxDetectedCount: Int = 20) {
self.lineWidth = lineWidth
self.strokeColor = strokeColor
self.maxDetectedCount = maxDetectedCount
self.autoRemoveSubLayers = autoRemoveSubLayers
}
deinit {
if session.isRunning {
session.stopRunning()
}
removeAllLayers()
}
// MARK: - Generate QRCode Image
/// generate image
///
/// - parameter stringValue: string value to encoe
/// - parameter avatarImage: avatar image will display in the center of qrcode image
/// - parameter avatarScale: the scale for avatar image, default is 0.25
///
/// - returns: the generated image
class open func generateImage(_ stringValue: String, avatarImage: UIImage?, avatarScale: CGFloat = 0.25) -> UIImage? {
return generateImage(stringValue, avatarImage: avatarImage, avatarScale: avatarScale, color: CIColor(color: UIColor.black), backColor: CIColor(color: UIColor.white))
}
/// Generate Qrcode Image
///
/// - parameter stringValue: string value to encoe
/// - parameter avatarImage: avatar image will display in the center of qrcode image
/// - parameter avatarScale: the scale for avatar image, default is 0.25
/// - parameter color: the CI color for forenground, default is black
/// - parameter backColor: th CI color for background, default is white
///
/// - returns: the generated image
class open func generateImage(_ stringValue: String, avatarImage: UIImage?, avatarScale: CGFloat = 0.25, color: CIColor, backColor: CIColor) -> UIImage? {
// generate qrcode image
let qrFilter = CIFilter(name: "CIQRCodeGenerator")!
qrFilter.setDefaults()
qrFilter.setValue(stringValue.data(using: String.Encoding.utf8, allowLossyConversion: false), forKey: "inputMessage")
let ciImage = qrFilter.outputImage
// scale qrcode image
let colorFilter = CIFilter(name: "CIFalseColor")!
colorFilter.setDefaults()
colorFilter.setValue(ciImage, forKey: "inputImage")
colorFilter.setValue(color, forKey: "inputColor0")
colorFilter.setValue(backColor, forKey: "inputColor1")
let transform = CGAffineTransform(scaleX: 10, y: 10)
let transformedImage = qrFilter.outputImage!.transformed(by: transform)
let image = UIImage(ciImage: transformedImage)
if avatarImage != nil {
return insertAvatarImage(image, avatarImage: avatarImage!, scale: avatarScale)
}
return image
}
class func insertAvatarImage(_ codeImage: UIImage, avatarImage: UIImage, scale: CGFloat) -> UIImage {
let rect = CGRect(x: 0, y: 0, width: codeImage.size.width, height: codeImage.size.height)
UIGraphicsBeginImageContext(rect.size)
codeImage.draw(in: rect)
let avatarSize = CGSize(width: rect.size.width * scale, height: rect.size.height * scale)
let x = (rect.width - avatarSize.width) * 0.5
let y = (rect.height - avatarSize.height) * 0.5
avatarImage.draw(in: CGRect(x: x, y: y, width: avatarSize.width, height: avatarSize.height))
let result = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return result!
}
// MARK: - Video Scan
/// prepare scan
///
/// - parameter view: the scan view, the preview layer and the drawing layer will be insert into this view
/// - parameter completion: the completion call back
open func prepareScan(_ view: UIView, completion:@escaping (_ stringValue: String)->()) {
scanFrame = view.bounds
completedCallBack = completion
currentDetectedCount = 0
setupSession()
setupLayers(view)
}
/// start scan
open func startScan() {
if session.isRunning {
print("the capture session is running")
return
}
session.startRunning()
}
/// stop scan
open func stopScan() {
if !session.isRunning {
print("the capture session is not running")
return
}
session.stopRunning()
}
func setupLayers(_ view: UIView) {
drawLayer.frame = view.bounds
view.layer.insertSublayer(drawLayer, at: 0)
previewLayer.frame = view.bounds
view.layer.insertSublayer(previewLayer, at: 0)
}
func setupSession() {
if session.isRunning {
print("the capture session is running")
return
}
if !session.canAddInput(videoInput!) {
print("can not add input device")
return
}
if !session.canAddOutput(dataOutput) {
print("can not add output device")
return
}
session.addInput(videoInput!)
session.addOutput(dataOutput)
dataOutput.metadataObjectTypes = dataOutput.availableMetadataObjectTypes;
dataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
}
open func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) {
clearDrawLayer()
for dataObject in metadataObjects {
if let codeObject = dataObject as? AVMetadataMachineReadableCodeObject,
let obj = previewLayer.transformedMetadataObject(for: codeObject) as? AVMetadataMachineReadableCodeObject {
if scanFrame.contains(obj.bounds) {
currentDetectedCount = currentDetectedCount + 1
if currentDetectedCount > maxDetectedCount {
session.stopRunning()
completedCallBack!(codeObject.stringValue!)
if autoRemoveSubLayers {
removeAllLayers()
}
}
// transform codeObject
drawCodeCorners(previewLayer.transformedMetadataObject(for: codeObject) as! AVMetadataMachineReadableCodeObject)
}
}
}
}
open func removeAllLayers() {
previewLayer.removeFromSuperlayer()
drawLayer.removeFromSuperlayer()
}
func clearDrawLayer() {
if drawLayer.sublayers == nil {
return
}
for layer in drawLayer.sublayers! {
layer.removeFromSuperlayer()
}
}
func drawCodeCorners(_ codeObject: AVMetadataMachineReadableCodeObject) {
if codeObject.corners.count == 0 {
return
}
let shapeLayer = CAShapeLayer()
shapeLayer.lineWidth = lineWidth
shapeLayer.strokeColor = strokeColor.cgColor
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.path = createPath(codeObject.corners as NSArray).cgPath
drawLayer.addSublayer(shapeLayer)
}
func createPath(_ points: NSArray) -> UIBezierPath {
let path = UIBezierPath()
var point = CGPoint(dictionaryRepresentation: points[0] as! CFDictionary)
path.move(to: point!)
var index = 1
while index < points.count {
point = CGPoint(dictionaryRepresentation: points[index] as! CFDictionary)
path.addLine(to: point!)
index = index + 1
}
path.close()
return path
}
/// previewLayer
lazy var previewLayer: AVCaptureVideoPreviewLayer = {
let layer = AVCaptureVideoPreviewLayer(session: self.session)
layer.videoGravity = AVLayerVideoGravity.resizeAspectFill
return layer
}()
/// drawLayer
lazy var drawLayer = CALayer()
/// session
lazy var session = AVCaptureSession()
/// input
lazy var videoInput: AVCaptureDeviceInput? = {
if let device = AVCaptureDevice.default(for: .video) {
return try? AVCaptureDeviceInput(device: device)
}
return nil
}()
/// output
lazy var dataOutput = AVCaptureMetadataOutput()
} ` I have change syntax error for Swift 4. But Its Not Working. Please Help me
Please replace func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) to func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection)
Hi replace code for Swift 4.0 Hi is a worker
// // QRCode.swift // QRCode // // Created by 刘凡 on 15/5/15. // Copyright (c) 2015年 joyios. All rights reserved. //
import UIKit import AVFoundation
open class QRCode: NSObject, AVCaptureMetadataOutputObjectsDelegate {
/// corner line width
var lineWidth: CGFloat
/// corner stroke color
var strokeColor: UIColor
/// the max count for detection
var maxDetectedCount: Int
/// current count for detection
var currentDetectedCount: Int = 0
/// auto remove sub layers when detection completed
var autoRemoveSubLayers: Bool
/// completion call back
var completedCallBack: ((_ stringValue: String) -> ())?
/// the scan rect, default is the bounds of the scan view, can modify it if need
open var scanFrame: CGRect = CGRect.zero
/// init function
///
/// - returns: the scanner object
public override init() {
self.lineWidth = 4
self.strokeColor = UIColor.green
self.maxDetectedCount = 20
self.autoRemoveSubLayers = false
super.init()
}
/// init function
///
/// - parameter autoRemoveSubLayers: remove sub layers auto after detected code image
/// - parameter lineWidth: line width, default is 4
/// - parameter strokeColor: stroke color, default is Green
/// - parameter maxDetectedCount: max detecte count, default is 20
///
/// - returns: the scanner object
public init(autoRemoveSubLayers: Bool, lineWidth: CGFloat = 4, strokeColor: UIColor = UIColor.green, maxDetectedCount: Int = 20) {
self.lineWidth = lineWidth
self.strokeColor = strokeColor
self.maxDetectedCount = maxDetectedCount
self.autoRemoveSubLayers = autoRemoveSubLayers
}
deinit {
if session.isRunning {
session.stopRunning()
}
removeAllLayers()
}
// MARK: - Generate QRCode Image
/// generate image
///
/// - parameter stringValue: string value to encoe
/// - parameter avatarImage: avatar image will display in the center of qrcode image
/// - parameter avatarScale: the scale for avatar image, default is 0.25
///
/// - returns: the generated image
class open func generateImage(_ stringValue: String, avatarImage: UIImage?, avatarScale: CGFloat = 0.25) -> UIImage? {
return generateImage(stringValue, avatarImage: avatarImage, avatarScale: avatarScale, color: CIColor(color: UIColor.black), backColor: CIColor(color: UIColor.white))
}
/// Generate Qrcode Image
///
/// - parameter stringValue: string value to encoe
/// - parameter avatarImage: avatar image will display in the center of qrcode image
/// - parameter avatarScale: the scale for avatar image, default is 0.25
/// - parameter color: the CI color for forenground, default is black
/// - parameter backColor: th CI color for background, default is white
///
/// - returns: the generated image
class open func generateImage(_ stringValue: String, avatarImage: UIImage?, avatarScale: CGFloat = 0.25, color: CIColor, backColor: CIColor) -> UIImage? {
// generate qrcode image
let qrFilter = CIFilter(name: "CIQRCodeGenerator")!
qrFilter.setDefaults()
qrFilter.setValue(stringValue.data(using: String.Encoding.utf8, allowLossyConversion: false), forKey: "inputMessage")
let ciImage = qrFilter.outputImage
// scale qrcode image
let colorFilter = CIFilter(name: "CIFalseColor")!
colorFilter.setDefaults()
colorFilter.setValue(ciImage, forKey: "inputImage")
colorFilter.setValue(color, forKey: "inputColor0")
colorFilter.setValue(backColor, forKey: "inputColor1")
let transform = CGAffineTransform(scaleX: 10, y: 10)
let transformedImage = qrFilter.outputImage!.transformed(by: transform)
let image = UIImage(ciImage: transformedImage)
if avatarImage != nil {
return insertAvatarImage(image, avatarImage: avatarImage!, scale: avatarScale)
}
return image
}
class func insertAvatarImage(_ codeImage: UIImage, avatarImage: UIImage, scale: CGFloat) -> UIImage {
let rect = CGRect(x: 0, y: 0, width: codeImage.size.width, height: codeImage.size.height)
UIGraphicsBeginImageContext(rect.size)
codeImage.draw(in: rect)
let avatarSize = CGSize(width: rect.size.width * scale, height: rect.size.height * scale)
let x = (rect.width - avatarSize.width) * 0.5
let y = (rect.height - avatarSize.height) * 0.5
avatarImage.draw(in: CGRect(x: x, y: y, width: avatarSize.width, height: avatarSize.height))
let result = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return result!
}
// MARK: - Video Scan
/// prepare scan
///
/// - parameter view: the scan view, the preview layer and the drawing layer will be insert into this view
/// - parameter completion: the completion call back
open func prepareScan(_ view: UIView, completion:@escaping (_ stringValue: String)->()) {
scanFrame = view.bounds
completedCallBack = completion
currentDetectedCount = 0
setupSession()
setupLayers(view)
}
/// start scan
open func startScan() {
if session.isRunning {
print("the capture session is running")
return
}
session.startRunning()
}
/// stop scan
open func stopScan() {
if !session.isRunning {
print("the capture session is not running")
return
}
session.stopRunning()
}
func setupLayers(_ view: UIView) {
drawLayer.frame = view.bounds
view.layer.insertSublayer(drawLayer, at: 0)
previewLayer.frame = view.bounds
view.layer.insertSublayer(previewLayer, at: 0)
}
func setupSession() {
if session.isRunning {
print("the capture session is running")
return
}
if !session.canAddInput(videoInput!) {
print("can not add input device")
return
}
if !session.canAddOutput(dataOutput) {
print("can not add output device")
return
}
session.addInput(videoInput!)
session.addOutput(dataOutput)
dataOutput.metadataObjectTypes = dataOutput.availableMetadataObjectTypes;
dataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
}
open func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) {
clearDrawLayer()
for dataObject in metadataObjects {
if let codeObject = dataObject as? AVMetadataMachineReadableCodeObject,
let obj = previewLayer.transformedMetadataObject(for: codeObject) as? AVMetadataMachineReadableCodeObject {
if scanFrame.contains(obj.bounds) {
currentDetectedCount = currentDetectedCount + 1
if currentDetectedCount > maxDetectedCount {
session.stopRunning()
completedCallBack!(codeObject.stringValue!)
if autoRemoveSubLayers {
removeAllLayers()
}
}
// transform codeObject
drawCodeCorners(previewLayer.transformedMetadataObject(for: codeObject) as! AVMetadataMachineReadableCodeObject)
}
}
}
}
open func removeAllLayers() {
previewLayer.removeFromSuperlayer()
drawLayer.removeFromSuperlayer()
}
func clearDrawLayer() {
if drawLayer.sublayers == nil {
return
}
for layer in drawLayer.sublayers! {
layer.removeFromSuperlayer()
}
}
func drawCodeCorners(_ codeObject: AVMetadataMachineReadableCodeObject) {
if codeObject.corners.count == 0 {
return
}
let shapeLayer = CAShapeLayer()
shapeLayer.lineWidth = lineWidth
shapeLayer.strokeColor = strokeColor.cgColor
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.path = createPath(codeObject.corners as NSArray).cgPath
drawLayer.addSublayer(shapeLayer)
}
func createPath(_ points: NSArray) -> UIBezierPath {
let path = UIBezierPath()
var point = CGPoint(dictionaryRepresentation: points[0] as! CFDictionary)
path.move(to: point!)
var index = 1
while index < points.count {
point = CGPoint(dictionaryRepresentation: points[index] as! CFDictionary)
path.addLine(to: point!)
index = index + 1
}
path.close()
return path
}
/// previewLayer
lazy var previewLayer: AVCaptureVideoPreviewLayer = {
let layer = AVCaptureVideoPreviewLayer(session: self.session)
layer.videoGravity = AVLayerVideoGravity.resizeAspectFill
return layer
}()
/// drawLayer
lazy var drawLayer = CALayer()
/// session
lazy var session = AVCaptureSession()
/// input
lazy var videoInput: AVCaptureDeviceInput? = {
// .defaultDevice(withMediaType: AVMediaTypeVideo)
if let device = AVCaptureDevice.default(for: AVMediaType.video) {
return try? AVCaptureDeviceInput(device: device)
}
return nil
}()
/// output
lazy var dataOutput = AVCaptureMetadataOutput()
}
