The fairest, smartest and easiest way to read all kinds of AVMetadataObjectType objects like EAN13, QR Code, Aztec Codes and even face detection, among others barcodes with just one method call for iOS 7+ devices.

By default, Robocop is setup to read QR codes out-of-the-box.

Installation

1. The preferred way of installation is via Cocoapods. Just add

pod 'Robocop'

to your Podfile and run pod install. It will install the most recent version of Robocop.

Alternatively you could copy all the files in the Classes/ directory into your project. Be sure 'Copy items to destination group's folder' is checked.

Best Features

Blocks!!

Code Reader Handler

typedef void (^RobocopCodeReaderHandler)(NSString *machineCodeString);

You get this callback along with the string representation of the read code.

Rect of Interest Handler

typedef void (^RobocopRectOfInterestHandler)(CGRect rectOfInterest);

You get this callback with the CGRect representing the bounding rectangle of the object with respect to the picture in which the barcode/face resides.

Basic Usage

1. Import the header: #import "Robocop.h"
2. Setup QR Reader and Start reading:

[[Robocop sharedInstance]
        startReadingInView:self.view 
        readerHandler:^(NSString *machineCodeString) {
            NSLog(@"Code: %@", machineCodeString);
        } rectOfInterestHandler:^(CGRect rectOfInterest) {
            // The rect for the barcode being read
            // See code example to know how to add a highlight layer using this rect on top of your preview
            NSLog(@"%@", NSStringFromCGRect(rectOfInterest));
        }];

1. That's all!
   

Screenshots

Simple usage:

Available Methods

How to read other kinds of machine codes (including face detection)

- (void)startReadingMachineReadableCodeObjects:(NSArray *)codeObjects
                                        inView:(UIView *)preview
                                        readerHandler:(DHCodeReaderHandler)readerHandler
                                        rectOfInterestHandler:(DHReaderRectOfInterestHandler)rectOfIntesetHandler;

Use this method to pass an array containing the AVMetadataObjectType objects that you want the reader to be able to distinguish.

For example:

NSArray *codeTypes = @[AVMetadataObjectTypeFace, AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeQRCode];

And here is how you use the method with the array above mentioned:

[[Robocop sharedInstance]
     startReadingMachineReadableCodeObjects:codeTypes
     inView:self.view
     readerHandler:^(NSString *machineCodeString) {
         NSLog(@"Code: %@", machineCodeString);
    } rectOfInterestHandler:^(CGRect rectOfInterest) {
        NSLog(@"%@", NSStringFromCGRect(rectOfInterest));
    }];

All the code types that you can read are declared on AVFoundation/AVMetadataObject.h

How to read all available kind of codes (shortcut)

If you want to detect all kind of codes just pass nil to the method above for the codeObjects array.

[[Robocop sharedInstance]
     startReadingMachineReadableCodeObjects:nil
     inView:self.view
     readerHandler:^(NSString *machineCodeString) {
         NSLog(@"Code: %@", machineCodeString);
    } rectOfInterestHandler:^(CGRect rectOfInterest) {
        NSLog(@"%@", NSStringFromCGRect(rectOfInterest));
    }];

How to stop the reader

- (void)stop;

Simple enough, isn't it?

Contribution

Of course, please send a pull-request and/or raise an issue. It is always good to know how to make things better, yay!

Author

David Hernandez ([email protected])

License

Robocop is under the MIT License.