just got some errors runnign ZBar with my iOS App.
I included the newest Beta Version 1.3.1 in my Project and am Running the App locally on my iOS7 Device (iPhone 5)
You can download the zbar library compiled for arm7, arm7s and arm64 here
EDIT: I am still getting upvotes on this answer, the real current answer is that now the AV Foundation framework includes barcode scanning as of iOS 7. I would recommend using this over ZBar from here on out. Useful tutorial using AV Foundation to scan with sample code and supported types list or here