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I was wondering what type of technology is used in the apps that can scan a barcode and output data that that barcode represents. What type of programming would the app use to access the camera and be able to read a certain barcode?

if type of smartphone matters then specifically IOS.

Mnramos92
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  • i think you check this out http://stackoverflow.com/questions/15779477/various-barcode-reader-free-sdk-in-ios – iKambad Oct 21 '13 at 06:41

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You can use this framework in your code to have a barcode reader in your IOS app...

emreoktem
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In iOS 7, you can use the AVFoundation framework to scan barcodes natively. Here's a tutorial to get you started http://www.infragistics.com/community/blogs/torrey-betts/archive/2013/10/10/scanning-barcodes-with-ios-7-objective-c.aspx

If you need to support older versions of iOS, the ZBar library, which emreoktem has linked in his answer, is probably your best bet.

Kamaros
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i think here is the some demo code and also demo of app here http://stackoverflow.com/questions/15779477/various-barcode-reader-free-sdk-in-ios

iKambad
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