After an upgrading to Xcode 4, I have been having trouble compiling my own ZXing iOS project. That’s why I decided to explain you how to install easily ZXing with Xcode 4. First of all (for those who don’t know), ZXing is an open-source library to read the 1D/2D barcodes. This library is available on many platforms such as the iOS, Android, Blackberry, ect. You can find it here: http://code.google
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