Linker errors (undefined symbols) with Parse.framework - ios

Question

I added Parse.framework to my project. In AppDelegate.m, I just import it and set the application ID. It seemed OK, but when I run it, I get 4 errors.
What other frameworks should I add, or what else should I do ?
Here are the frameworks I added:
AudioToolbox.framework
CFNetwork.framework
CoreGraphics.framework
CoreLocation.framework
MobileCoreServices.framework
QuartzCore.framework
Security.framework
StoreKit.framework
SystemConfiguration.framework
libz.dylib
libsqlite3.dylib
Parse.framework
And here are the errors I am getting:
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_BFExecutor", referenced from:
objc-class-ref in Parse(Parse.o)//And other six
"_OBJC_CLASS_$_BFTask", referenced from:
objc-class-ref in Parse(Parse.o)//And other six
"_OBJC_CLASS_$_BFTaskCompletionSource", referenced from:
objc-class-ref in Parse(PFOfflineStore.o)//And other six
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

You must also add the Bolts.framework that comes with the Parse SDK as described in Step 2 on the quick start page:
https://www.parse.com/apps/quickstart#parse_data/mobile/ios/native/existing.
And ensure it gets listed under "Build Phases -> Link Binary with Libraries."

Answer 2

EDIT
Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error
Found this.
This usually happens when you have multiple classes with same name in your. You might have included a file more then once.
Also check if you have by any chance imported .m file into some file.