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 reader = QRCodeReaderViewController(metadataObjectTypes: [AVMetadataObjectTypeQRCode])
@IBAction func scanAction(sender: AnyObject) {
// Retrieve the QRCode content
// By using the delegate pattern
reader.delegate = self
// Or by using the closure pattern
reader.completionBlock = { (result: QRCodeReaderResult?) in
println(result)
}
// Presents the reader as modal form sheet
reader.modalPresentationStyle = .FormSheet
presentViewController(reader, 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 setup
Go 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', '~> 5.3.1'
Install into your project:
$ pod install
Open your project in Xcode from the .xcworkspace file (not the usual project file):
$ open MyProject.xcworkspace
You 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 carthage
To integrate QRCodeReader
into your Xcode project using Carthage, specify it in your Cartfile
file:
github "yannickl/QRCodeReader.swift" >= 5.3.1
Download the project and copy the QRCodeReader
folder into your project to use it in.
Yannick Loriot
Copyright (c) 2014-present - Yannick Loriot
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.
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