How to Scan QR Codes + More Bar Codes using Bar Code Scanner in Expo React Native

Hi everyone!

Today I want to show you how to scan QR codes and more different types of bar codes in your expo react native apps using the expo-barcode-scanner package. This tutorial will cover requesting permissions so that you can access the camera for bar code scanning. It will also cover using the BarCodeScanner component and how to scan different bar codes.

The full code for this tutorial can be found on GitHub:

And the full documentation for the BarCodeScanner can be found on the expo website:

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// ABOUT ME
My name is Chelsea and I started studying software engineering in 2010. I have been working commercially full time since 2014 and have been in various positions from graduate developer to tech lead to solution architect.
I'm a full stack developer with a lot of experience in C# and Javascript but my passion is for mobile development; specifically native iOS development and cross platform using React Native.

I always have many things on the go and am always trying out a new side hustle and failing at it; perhaps you can learn from my mistakes!

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This is the kit I started with it includes the lens linked above and is a great starter camera.

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[hyantsu]

This video helped me a lot, thank you! 😊

[ayb.s]

Hi, I like your videos, they are so useful for me,
Thanks, continue. ;)

[timtom]

hi, this works well when theres one sreen, if we navigate to antoher screen and then come back to the scanner screen it doesnt scan ...can you suggest something?

[adejumoahmad]

Hi i tried using the library and when i try testing using detox i get this error "Unhandled JS Exception: TypeError: undefined is not an object (evaluating 'v.default.BarCodeType')"

[aexelm]

I have been trying to implement this code for reading or scanning 2d code PDF417 type (ID colombia standart). But although is supposed this type is supported for the library on Expo, is not working.
Any sugestion? Please I will appreciate it.

[RD-jrnv]

My barcode scanner never appears. Just a white screen. So fucking annoying!!!