The QRCodeReaderViewController was initialy 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 7 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.
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 QRCodeReaderViewController:
$ cd /path/to/MyProject
$ touch Podfile
$ edit Podfile
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '7.0'
pod 'QRCodeReaderViewController', '~> 3.5.2'Install into your project:
$ pod installOpen your project in Xcode from the .xcworkspace file (not the usual project file)
$ open MyProject.xcworkspaceDownload the project and copy the QRCodeReaderViewController folder into your project and then simply #import "QRCodeReaderViewController.h" in the file(s) you would like to use it in.
- (IBAction)scanAction:(id)sender
{
NSArray *types = @[AVMetadataObjectTypeQRCode];
_reader = [QRCodeReaderViewController readerWithMetadataObjectTypes:types];
// Set the presentation style
_reader.modalPresentationStyle = UIModalPresentationFormSheet;
// Using delegate methods
_reader.delegate = self;
// Or by using blocks
[_reader setCompletionWithBlock:^(NSString *resultAsString) {
[self dismissViewControllerAnimated:YES completion:^{
NSLog(@"%@", resultAsString);
}];
}];
[self presentViewController:_reader animated:YES completion:NULL];
}
#pragma mark - QRCodeReader Delegate Methods
- (void)reader:(QRCodeReaderViewController *)reader didScanResult:(NSString *)result
{
[self dismissViewControllerAnimated:YES completion:^{
NSLog(@"%@", result);
}];
}
- (void)readerDidCancel:(QRCodeReaderViewController *)reader
{
[self dismissViewControllerAnimated:YES completion:NULL];
}Note that you should check whether the device supports the reader library by using the [QRCodeReader isAvailable] or the [QRCodeReader supportsMetadataObjectTypes:nil] methods.
Yannick Loriot
Copyright (c) 2014-present - Yannick Loriot
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