'Framework not found' in Xcode

Question

I know this has been asked a couple of times. I followed instructions from these ones:

Adding frameworks to project in Xcode 5 and having *relative* paths added

Answer 1

If you are using CocoaPods. Similar thing has happened to me. Although this question is old someone like me might still be struggling. So for to help: after pod install it warns you about project files. I didn't notice till now. it says:

[!] Please close any current Xcode sessions and use ProjectFile.xcworkspace for this project from now on.

So basically, do not continue working on .xcodeproj after installing Pods. If you do linker won't find files.