Download Barcodes with iOS by Oliver Drobnik PDF

By Oliver Drobnik

Summary

Barcodes with iOS is the 1st and basically publication that comprehensively addresses barcode expertise for the iOS developer. It deals an advent to familiar codecs, reminiscent of ISBN and UPC codes, and offers real-world examples that train you the way 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 fast upload local barcode aid in your latest firm apps or begin development new apps that aid assemble the actual and electronic worlds.

Purchase of the print publication features a loose book in PDF, Kindle, and ePub codecs from Manning Publications.

About the Technology

Barcodes are a common option to music 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 development apps that experiment, exhibit, and print barcodes, removing 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 whenever you discover real-world examples that combine code scanning and iteration and metadata retrieval into your apps. alongside the best way, you'll choose up quite a few most sensible practices for bringing jointly the actual and electronic worlds.

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

What's Inside

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

About the Author

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

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Extra resources for Barcodes with iOS

Sample text

You need to add a _setupCamera method to set up the media capture stack. This will contain code for initializing various components of AV Foundation for media capture. First, you need code to retrieve the default capture device for the AVMediaTypeVideo media type. Usually this will be a camera pointing away from the user. Add this code to _setupCamera: _camera = [AVCaptureDevice defaultDeviceWithMediaType: AVMediaTypeVideo]; 27 Building a camera app Camera! 7 ports AVCaptureInputPort The capture device is plugged into the device input.

In 1998 Eastman Kodak Company patented the use of Code 25 for marking film canisters for automatic processing in film development machines. The barcode can only encode pairs of digits. The first digit is encoded in five bars, and the second digit is encoded in five spaces interleaved with the bars. There are two widths for bars and spaces. The encoding table is constructed such that there will always be two wide spaces and bars for one pair of digits. 10). 13 Barcode symbologies in iOS As one of the oldest barcode types in use today, Code 25 has a few flaws.

Exceptions are bad for the user experience: they terminate your app. 8 Taking pictures to the camera roll Now you get to take pictures! Let’s fill in the action method for the Snap! button. To take pictures, you need to add an AVCaptureStillImageOutput class to your capture session. 12). Camera! Meta AVCaptureDevice AVCaptureInputPort initWithDevice: Video AVCaptureDeviceInput addInput: ports AVCaptureInputPort startRunning: stopRunning: inputs I’m the manager! 12 the media streams from the capture device (top left) and flows through the device input into the capture session.

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