objective c - not found for architecture i386 iOS -

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i finding following error while trying run project ios charts library. code works fine on simulator when running on iphone5 , ipad2 build fails iphone6 , above:

undefined symbols architecture i386:   "_objc_class_$__ttc6charts12barchartdata", referenced from:       objc-class-ref in smwbarchartsviewcontroller.o       objc-class-ref in smwbargraphviewcontroller.o   "_objc_class_$__ttc6charts12piechartdata", referenced from:       objc-class-ref in smwpiechartsviewcontroller.o   "_objc_class_$__ttc6charts15barchartdataset", referenced from:       objc-class-ref in smwbarchartsviewcontroller.o       objc-class-ref in smwbargraphviewcontroller.o   "_objc_class_$__ttc6charts15piechartdataset", referenced from:       objc-class-ref in smwpiechartsviewcontroller.o   "_objc_class_$__ttc6charts17barchartdataentry", referenced from:       objc-class-ref in smwbarchartsviewcontroller.o       objc-class-ref in smwpiechartsviewcontroller.o       objc-class-ref in smwbargraphviewcontroller.o ld: symbol(s) not found architecture i386 clang: error: linker command failed exit code 1 (use -v see invocation)

i have been able solve issue. included arm64 in valid architecture. problem was trying integrate library existing objective c project. earlier using core plot. core plot files creating problem. if core plot files included then, not include arm64 in valid architecture due crashed on iphone6. removed core plot files , started working smoothly.


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