Issue in running QR Code reader sdk

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I am doing a project to read QR codes.For that I am using the sample code from 2D barcodes (QR Code, Data Matrix) - iOS4 or above only from the link http://www.quickmark.com.tw/En/basic/SDK.asp But when I am trying to run that sdk I am getting an error saying "_OBJC_CLASS_$_DecodePickerController", referenced from:Objc-class-ref in QMSampleViewController.o Symbol(s) not found for architecture i386 Collect2: ld returned 1 exit status. what is the reason?anyone tried this?help please.

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I have tried to build the sdk, there is no issue for device build.May be you are trying to build for iPhone simulator. Please try to build it for device.