Qr code with text below protocol how to#
Qr code with text below protocol code#

Note that this application cannot be tested on the Simulator, neither to a device without a camera, as everything is based on real-time video capturing.

Qr code with text below protocol code#

When a scan has been completed and the contained information has been translated and is ready to be displayed.ДЄlso, a sound effect (a beep sound) is being played every time a QR code has been successfully read to make our app more vivid and interactive.

When a code scanning is not yet performed.

The status label is going to show three different messages, depending on the scanning state:

Once that happens, the start buttonвЂ™s title changes to Stop, while its functionality changes as well with aim to enable us to stop capturing at any time. By tapping the start bar button at the toolbar, a video capturing session is initiated in order to scan for QR codes. Initially, when the app is launched, the interface shown in the figure above is first displayed. Here is how the demo application is going to work: Right next, another UILabel plays the role of the status log while a code is being read, and finally a toolbar lies at the bottom of the view, with one bar button item only which will be used to start and stop the capturing. A UILabel exists on top of it, simply prompting to tap on the start button to begin reading a QR code. So, beginning from top to bottom, at first there is a UIView view, which is going to be the container for the preview layer of the video captured by the device. Keep this info on mind, as itвЂ™s the starting point for the entire application.Д®ven though itвЂ™s not hard to figure out what all subviews layed on the interface are for, IвЂ™ll make a quick reference on them, so itвЂ™ll become absolutely clear what our app is going to contain. One can create a QR Code to use on its website, or on any other place that may wants.Д«efore I proceed to a discussion regarding the demo figures above, itвЂ™s important to underline at this point that any barcode scanning, including QR codes, is totally based on video capturing, thatвЂ™s why AVFoundation framework supports the barcode reading feature. QR Codes are used mainly for marketing reasons, but not only. Some typical content examples of a QR Code are: A QR Code can store a great amount of data (in relation to the ordinary barcode), so there is a variety of information that can be encoded in it. The data thatвЂ™s being encapsulated into such a code, is read by devices specificly designed for this job, or by smart devices (smartphones, tablets) using the appropriate software. Instead of the vertical lines like those that the well-known barcode contains, a QR Code can have its lines designed in both horizontal and vertical directions. One of the new features that the AVFoundation incorporates, is the ability to discover and read bar codes in real-time, and one of the supported bar code types that we especially interested in at this tutorial, is the QR Code.ДЄ Quick Response Code (QR Code) is actually a two-dimensional (2D) barcode.

The AVFoundation framework is just one of them, as it has accepted great enhancements and new class additions that make even more tools available. Both major additions and minor improvements have been made, offering developers new or updated frameworks and APIs to work with, and the opportunity to provide single users with a much richer experience. IOS 7 brings a wealth of new features that set it apart from all other mobile operating systems.

Qr code with text below protocol how to#

IOS How To Scan QR Code Using AVFoundation Framework