263 lines
9.9 KiB
Swift
263 lines
9.9 KiB
Swift
/*
|
|
* QRCodeReader.swift
|
|
*
|
|
* Copyright 2014-present Yannick Loriot.
|
|
* http://yannickloriot.com
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
import UIKit
|
|
import AVFoundation
|
|
|
|
/// Convenient controller to display a view to scan/read 1D or 2D bar codes like the QRCodes. It is based on the `AVFoundation` framework from Apple. It aims to replace ZXing or ZBar for iOS 7 and over.
|
|
public class QRCodeReaderViewController: UIViewController {
|
|
private var cameraView = ReaderOverlayView()
|
|
private var cancelButton: UIButton?
|
|
private var switchCameraButton: SwitchCameraButton?
|
|
private var toggleTorchButton: ToggleTorchButton?
|
|
|
|
/// The code reader object used to scan the bar code.
|
|
public let codeReader: QRCodeReader
|
|
|
|
let startScanningAtLoad: Bool
|
|
let showCancelButton: Bool
|
|
let showSwitchCameraButton: Bool
|
|
let showTorchButton: Bool
|
|
|
|
// MARK: - Managing the Callback Responders
|
|
|
|
/// The receiver's delegate that will be called when a result is found.
|
|
public weak var delegate: QRCodeReaderViewControllerDelegate?
|
|
|
|
/// The completion blocak that will be called when a result is found.
|
|
public var completionBlock: ((QRCodeReaderResult?) -> Void)?
|
|
|
|
deinit {
|
|
codeReader.stopScanning()
|
|
|
|
NotificationCenter.default.removeObserver(self)
|
|
}
|
|
|
|
// MARK: - Creating the View Controller
|
|
|
|
/**
|
|
Initializes a view controller using a builder.
|
|
|
|
- parameter builder: A QRCodeViewController builder object.
|
|
*/
|
|
required public init(builder: QRCodeReaderViewControllerBuilder) {
|
|
startScanningAtLoad = builder.startScanningAtLoad
|
|
codeReader = builder.reader
|
|
showCancelButton = builder.showCancelButton
|
|
showSwitchCameraButton = builder.showSwitchCameraButton
|
|
showTorchButton = builder.showTorchButton
|
|
|
|
super.init(nibName: nil, bundle: nil)
|
|
|
|
view.backgroundColor = .black
|
|
|
|
codeReader.didFindCode = { [weak self] resultAsObject in
|
|
if let weakSelf = self {
|
|
weakSelf.completionBlock?(resultAsObject)
|
|
weakSelf.delegate?.reader(weakSelf, didScanResult: resultAsObject)
|
|
}
|
|
}
|
|
|
|
setupUIComponentsWithCancelButtonTitle(builder.cancelButtonTitle)
|
|
setupAutoLayoutConstraints()
|
|
|
|
cameraView.layer.insertSublayer(codeReader.previewLayer, at: 0)
|
|
|
|
NotificationCenter.default.addObserver(self, selector: #selector(orientationDidChanged), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)
|
|
}
|
|
|
|
required public init?(coder aDecoder: NSCoder) {
|
|
codeReader = QRCodeReader(metadataObjectTypes: [])
|
|
startScanningAtLoad = false
|
|
showCancelButton = false
|
|
showTorchButton = false
|
|
showSwitchCameraButton = false
|
|
|
|
super.init(coder: aDecoder)
|
|
}
|
|
|
|
// MARK: - Responding to View Events
|
|
override public var supportedInterfaceOrientations: UIInterfaceOrientationMask {
|
|
return parent?.supportedInterfaceOrientations ?? .all
|
|
}
|
|
|
|
override public func viewWillAppear(_ animated: Bool) {
|
|
super.viewWillAppear(animated)
|
|
|
|
if startScanningAtLoad {
|
|
startScanning()
|
|
}
|
|
}
|
|
|
|
override public func viewWillDisappear(_ animated: Bool) {
|
|
stopScanning()
|
|
|
|
super.viewWillDisappear(animated)
|
|
}
|
|
|
|
override public func viewWillLayoutSubviews() {
|
|
super.viewWillLayoutSubviews()
|
|
|
|
codeReader.previewLayer.frame = view.bounds
|
|
}
|
|
|
|
// MARK: - Managing the Orientation
|
|
|
|
func orientationDidChanged(_ notification: Notification) {
|
|
cameraView.setNeedsDisplay()
|
|
|
|
if let device = notification.object as? UIDevice , codeReader.previewLayer.connection.isVideoOrientationSupported {
|
|
codeReader.previewLayer.connection.videoOrientation = QRCodeReader.videoOrientation(deviceOrientation: device.orientation, withSupportedOrientations: supportedInterfaceOrientations, fallbackOrientation: codeReader.previewLayer.connection.videoOrientation)
|
|
}
|
|
}
|
|
|
|
// MARK: - Initializing the AV Components
|
|
|
|
private func setupUIComponentsWithCancelButtonTitle(_ cancelButtonTitle: String) {
|
|
cameraView.clipsToBounds = true
|
|
cameraView.translatesAutoresizingMaskIntoConstraints = false
|
|
view.addSubview(cameraView)
|
|
|
|
codeReader.previewLayer.frame = CGRect(x: 0, y: 0, width: view.frame.size.width, height: view.frame.size.height)
|
|
|
|
if codeReader.previewLayer.connection.isVideoOrientationSupported {
|
|
let orientation = UIDevice.current.orientation
|
|
|
|
codeReader.previewLayer.connection.videoOrientation = QRCodeReader.videoOrientation(deviceOrientation: orientation, withSupportedOrientations: supportedInterfaceOrientations)
|
|
}
|
|
|
|
if showSwitchCameraButton && codeReader.hasFrontDevice {
|
|
let newSwitchCameraButton = SwitchCameraButton()
|
|
newSwitchCameraButton.translatesAutoresizingMaskIntoConstraints = false
|
|
newSwitchCameraButton.addTarget(self, action: #selector(switchCameraAction), for: .touchUpInside)
|
|
view.addSubview(newSwitchCameraButton)
|
|
|
|
switchCameraButton = newSwitchCameraButton
|
|
}
|
|
|
|
if showTorchButton && codeReader.isTorchAvailable {
|
|
let newToggleTorchButton = ToggleTorchButton()
|
|
newToggleTorchButton.translatesAutoresizingMaskIntoConstraints = false
|
|
newToggleTorchButton.addTarget(self, action: #selector(toggleTorchAction), for: .touchUpInside)
|
|
view.addSubview(newToggleTorchButton)
|
|
toggleTorchButton = newToggleTorchButton
|
|
}
|
|
|
|
if showCancelButton {
|
|
let newCancelButton = UIButton()
|
|
newCancelButton.translatesAutoresizingMaskIntoConstraints = false
|
|
newCancelButton.setTitle(cancelButtonTitle, for: .normal)
|
|
newCancelButton.setTitleColor(.gray, for: .highlighted)
|
|
newCancelButton.addTarget(self, action: #selector(cancelAction), for: .touchUpInside)
|
|
view.addSubview(newCancelButton)
|
|
|
|
cancelButton = newCancelButton
|
|
}
|
|
}
|
|
|
|
private func setupAutoLayoutConstraints() {
|
|
let views = ["cameraView": cameraView]
|
|
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[cameraView]|", options: [], metrics: nil, views: views))
|
|
|
|
if let _cancelButton = cancelButton {
|
|
let cancelViews: [String: UIView] = ["cancelButton": _cancelButton, "cameraView": cameraView]
|
|
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[cameraView][cancelButton(40)]|", options: [], metrics: nil, views: cancelViews))
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-[cancelButton]-|", options: [], metrics: nil, views: cancelViews))
|
|
}
|
|
else {
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[cameraView]|", options: [], metrics: nil, views: views))
|
|
}
|
|
|
|
if let _switchCameraButton = switchCameraButton {
|
|
let switchViews: [String: AnyObject] = ["switchCameraButton": _switchCameraButton, "topGuide": topLayoutGuide]
|
|
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:[topGuide]-[switchCameraButton(50)]", options: [], metrics: nil, views: switchViews))
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:[switchCameraButton(70)]|", options: [], metrics: nil, views: switchViews))
|
|
}
|
|
|
|
if let _toggleTorchButton = toggleTorchButton {
|
|
let toggleViews: [String: AnyObject] = ["toggleTorchButton": _toggleTorchButton, "topGuide": topLayoutGuide]
|
|
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:[topGuide]-[toggleTorchButton(50)]", options: [], metrics: nil, views: toggleViews))
|
|
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[toggleTorchButton(70)]", options: [], metrics: nil, views: toggleViews))
|
|
}
|
|
}
|
|
|
|
// MARK: - Controlling the Reader
|
|
|
|
/// Starts scanning the codes.
|
|
public func startScanning() {
|
|
codeReader.startScanning()
|
|
}
|
|
|
|
/// Stops scanning the codes.
|
|
public func stopScanning() {
|
|
codeReader.stopScanning()
|
|
}
|
|
|
|
// MARK: - Catching Button Events
|
|
|
|
func cancelAction(_ button: UIButton) {
|
|
codeReader.stopScanning()
|
|
|
|
if let _completionBlock = completionBlock {
|
|
_completionBlock(nil)
|
|
}
|
|
|
|
delegate?.readerDidCancel(self)
|
|
}
|
|
|
|
func switchCameraAction(_ button: SwitchCameraButton) {
|
|
codeReader.switchDeviceInput()
|
|
}
|
|
|
|
func toggleTorchAction(_ button: ToggleTorchButton) {
|
|
codeReader.toggleTorch()
|
|
}
|
|
}
|
|
|
|
/**
|
|
This protocol defines delegate methods for objects that implements the `QRCodeReaderDelegate`. The methods of the protocol allow the delegate to be notified when the reader did scan result and or when the user wants to stop to read some QRCodes.
|
|
*/
|
|
public protocol QRCodeReaderViewControllerDelegate: class {
|
|
/**
|
|
Tells the delegate that the reader did scan a code.
|
|
|
|
- parameter reader: A code reader object informing the delegate about the scan result.
|
|
- parameter result: The result of the scan
|
|
*/
|
|
func reader(_ reader: QRCodeReaderViewController, didScanResult result: QRCodeReaderResult)
|
|
|
|
/**
|
|
Tells the delegate that the user wants to stop scanning codes.
|
|
|
|
- parameter reader: A code reader object informing the delegate about the cancellation.
|
|
*/
|
|
func readerDidCancel(_ reader: QRCodeReaderViewController)
|
|
}
|