How do you create a static library in XCode and reference from 3rd party project?

I need to create a new target in project SDKTest.xcodeproj (say target is named lib_SDK.a) which contains all of the files in SDKTest.xcodeproj. I would then like to be able to import the lib_SDK.a file in my third party application called Client.xcodeproj and instanciate objects from that library, say an object called ScanMe.h

I am currently doing this by creating a project reference in Client.xcodeproj. The problem is 开发者_如何学Gothat the lib_SDK.a file is red in Client.xcodeproj...perhaps I haven't created the library correctly? I am also unsure how to verify that all the headers are included in this lib_SDK.a library.

Can anyone walk me through steps? I have scoured blogs/tutorials but am having problems still!

There are several descriptions on the net about how to do it, e.g:

Creating a Static Library for iPhone

Build iPhone static library with XCode