We are using Zbar bar code reader from last 2 years. With iOS 7 and Xcode 5, after scanning 5 bar codes the app is reaching 100 % cpu use for iOS 7 device(I can see that in
i fixed the issue now with implementing the Diff from the source. If someone of you need it, you can download the compiled zBar SDK with iOS7 Support here.
You can just replace the libzbar.a - this should work. But i uploaded the complete SDK as someone may need it too with headers etc.
http://nerdvision.net/app-development/ios/zbar-sdk