Duplicate symbols for architecture i386 clang

problem ：

I've seen several posts on google and stackoverflow related to this error, I've read all of them but still fetching the problem , I will be glad for a solution. I am here google and stackoverflow I saw several posts related to this error on , I have read all these posts but still mentioned the problem , I'm happy to find a solution .Here is the error mesage I recieve when compiling ... This is the error message I received at compile time ...

directory not found for option '-L/Users/somefolder/Documents/Bharat/MyApp copy/GoogleAdMobAdsSDK' duplicate symbol _OBJC_CLASS_$_AppDelegate in: /Users/madept/Library/Developer/Xcode/DerivedData/Alpha-dvvymdlmzseytagllsmbbrxdgutz/Build/Intermediates/Alpha.build/Debug-iphonesimulator/Alpha.build/Objects-normal/i386/AppDelegate-56890B6B994A4284.o No options found '-L / Users / somefolder / Documents / Bharat / MyApp copy / GoogleAdMobAdsSDK' Repeat symbol _OBJC_CLASS _ $ _ AppDelegate：/ Users / madept / Library / Developer / Xcode / DerivedData / Alpha-dvvymdlmzseytagllsmbbrxdgutz / Build / Intermediates / Alpha.build/Debug-iphonesimulator/Alpha.build/Objects-normal/i386/AppDelegate-56890B6B994A4284.o

Thanks. thank you .

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Solution ：

Reference resources ： https://stackoom.com/en/question/pWUQ