The QRCodeReader.swift was initially a simple QRCode reader but it now lets you the possibility to specify the format type you want to decode. It is based on the AVFoundation framework from Apple in order to replace ZXing or ZBar for iOS 8.0 and over.
It provides a default view controller to display the camera view with the scan area overlay and it also provides a button to switch between the front and the back cameras.
Note: the v4.x or over are compatibles with swift 1.2, use the v3 with Xcode 6.2 or lower.
// Good practice: create the reader lazily to avoid cpu overload during the
// initialization and each time we need to scan a QRCode
lazy var readerVC = QRCodeReaderViewController(metadataObjectTypes: [AVMetadataObjectTypeQRCode])
@IBAction func scanAction(sender: AnyObject) {
// Retrieve the QRCode content
// By using the delegate pattern
readerVC.delegate = self
// Or by using the closure pattern
readerVC.completionBlock = { (result: QRCodeReaderResult?) in
println(result)
}
// Presents the readerVC as modal form sheet
readerVC.modalPresentationStyle = .FormSheet
presentViewController(readerVC, animated: true, completion: nil)
}
// MARK: - QRCodeReader Delegate Methods
func reader(reader: QRCodeReader, didScanResult result: QRCodeReaderResult) {
self.dismissViewControllerAnimated(true, completion: nil)
}
func readerDidCancel(reader: QRCodeReader) {
self.dismissViewControllerAnimated(true, completion: nil)
}Note that you should check whether the device supports the reader library by using the QRCodeReader.isAvailable() or the QRCodeReader.supportsMetadataObjectTypes() methods.
The recommended approach to use QRCodeReaderViewController in your project is using the CocoaPods package manager, as it provides flexible dependency management and dead simple installation.
Install CocoaPods if not already available:
$ [sudo] gem install cocoapods
$ pod setupGo to the directory of your Xcode project, and Create and Edit your Podfile and add QRCodeReader.swift:
$ cd /path/to/MyProject
$ touch Podfile
$ edit Podfile
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!
pod 'QRCodeReader.swift', '~> 6.0.0'Install into your project:
$ pod installOpen your project in Xcode from the .xcworkspace file (not the usual project file):
$ open MyProject.xcworkspaceYou can now import QRCodeReader framework into your files.
Carthage is a decentralized dependency manager that automates the process of adding frameworks to your Cocoa application.
You can install Carthage with Homebrew using the following command:
$ brew update
$ brew install carthageTo integrate QRCodeReader into your Xcode project using Carthage, specify it in your Cartfile file:
github "yannickl/QRCodeReader.swift" >= 6.0.0
Download the project and copy the QRCodeReader folder into your project to use it in.
Yannick Loriot
Copyright (c) 2014-present - Yannick Loriot
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