Barcodes with iOS by Oliver Drobnik

By Oliver Drobnik


Barcodes with iOS is the 1st and purely booklet that comprehensively addresses barcode know-how for the iOS developer. It deals an advent to familiar codecs, corresponding to ISBN and UPC codes, and gives real-world examples that train you ways to combine code scanning and new release into your apps. This e-book consolidates information regarding appropriate Apple frameworks in a single position so that you can quick upload local barcode aid for your latest firm apps or begin construction new apps that aid compile the actual and electronic worlds.

Purchase of the print e-book incorporates a loose booklet in PDF, Kindle, and ePub codecs from Manning Publications.

About the Technology

Barcodes are a common strategy to tune and percentage info, showing on every little thing from cereal bins to buy home windows. beginning with iOS 7, Apple has additional local good points for construction apps that experiment, reveal, and print barcodes, taking out the necessity for third-party libraries.

About the Book

Barcodes with iOS teaches you ways to successfully use barcodes on your iOS apps. You'll grasp Apple's new barcode frameworks once you discover real-world examples that combine code scanning and iteration and metadata retrieval into your apps. alongside the way in which, you'll decide up a number of most sensible practices for bringing jointly the actual and electronic worlds.

This publication is written for readers with a operating wisdom of Objective-C and iOS app development.

What's Inside

Learn approximately all barcode codecs supported by means of iOS
Native barcode scanning with AV Foundation
Using center photo and BarCodeKit to supply quite a lot of barcodes
Printing to sheets and labels with AirPrint
Retrieving metadata for items with NSURLSession and NSURLProtocol
Harnessing context details from middle position and iBeacons

About the Author

Oliver Drobnik is an self sustaining advisor focusing on customized iOS and Mac improvement.

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Extra resources for Barcodes with iOS

Example text

Thanks to these features, PDF417 has become the 2D barcode of choice for a great variety of use cases. PDF417 is one of the formats accepted by the United States Postal Service for printing postage. More than 200 airlines have settled on using it as the Bar Coded Boarding Pass standard since 2005. It’s also used by package services and on ID cards. QR CODE You’ve probably seen a QR Code before: a large square made up of small squares, with larger squares in three of its corners. 13 for an example.

Camera sound The still image capturing method also makes a camera-shutter sound. Apparently there have been incidents of people sticking their camera apps where they don’t belong, so some governments mandate that you shouldn’t be able to disable the camera sound on mobile phones. If you can, you should abide by these rules, but if you absolutely need to eliminate the sound, there’s a way to do that: you can employ AVCaptureVideoDataOutput, which lets you grab individual video frame sample buffers and then convert them to images.

The origins of the name are unknown—there’s nothing in the standard with the number 93. Maybe it’s just a play on the name of its predecessor. By placing the 9 in front, it sounds newer, bigger, and better. That’s marketing for you. Code 93 at its core has 43 characters and 5 special characters. Like Code 39, it can represent all 128 ASCII characters with the help of control characters. This feature was tacked on to Code 39 by reusing codes, but in Code 93 dedicated control characters are used.

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