ZBarSDK-for-iOS
64bits ZbarSDK for iOS (armv7, amrv7s, arm64).
Refers to http://stackoverflow.com/questions/18740304/linker-error-in-xcode-5/18937831#18937831
The lib in this repo has already been rebuilt for 64bit devices, but in case you want to built it on your own, the explicit steps are listed below:
Download Mercurial first
Clone the source:
hg clone http://zbar.hg.sourceforge.net:8000/hgroot/zbar/zbar
cd zbar
hg checkout iPhoneSDK-1.3.1
open iphone/zbar.xcodeproj
In Xcode's menu, select "Product > Scheme > libzbar" and then select "Product > Scheme > Edit Scheme…".Select "Run" in the build configuration and click OK.
In the Project and Targets list, select the libzbar target and click on the Build Settings tab. Verify your Architecture settings, as shown in the screenshot. (Make sure it says iOS and arm64 armv7 armv7s.)Also don't forget to change Architectures to Standard architectures (armv7, armv7s, arm64), otherwise your project won't compile with arm64 (this is not shown properly on screenshot).
Go back to "Product > Scheme > Edit Scheme…" and check the "Destination" drop-down menu. Change to the simulator. (Build once for both iOS Device and simulator)
Combine the two library:
cd ~/Library/Developer/Xcode/DerivedData
/Users/mario/Library/Developer/Xcode/DerivedData/zbar-******
cd Build
cd Products
lipo -create Release-iphoneos/libzbar.a Release-iphonesimulator/libzbar.a -o libzbar.a
cp libzbar.a ~/Desktop (Copy it to your desktop)
replace the libzbar.a in your project!
Done!