Create and use static library on OS X

OK, I'm trying to create a Cocoa Library (static) and use, but I keep getting errors.

I created a super-basic static Library (TSXLib) with just one additional class in it.

#import <Foundation/Foundation.h>

@interface ClassOne : NSObject

- (void)doIt;

@end

#import "ClassOne.h"

@implementation ClassOne

- (void)doIt
{
    NSLog(@"Oops... I did it again!");
}

@end

Then, I set the Dynamic Library Install Name (in Build Settings) to :

@executable_path/../Frameworks/libTSXLib.a

Now in my Test Project :

I drag'n'drop the libTSXLib.a file (and copied it to target)
Added a Build Phase (Copy Files) where I'm copying the libTSXLib.a to Frameworks
I'm then going to my AppDelegate.m and try importing my library's class
At #import <ClassOne.h>, the compiler throws an error that it can't find the class

Any ideas?

NOTE : I'm actually quite confused regarding libraries, frameworks, etc (that's why I tend to avoid them as much as possible). All I'm trying to do is pack some of classes/functions so that I can easily re-use them in different projects. Whether it is a framework, or a library, I really don't care. What I need is that : pack and re-use my code. (the ability to block anyone from seeing/using what's in, when bundled, would be a Plus)

OK, so, coming back after some time, here's what I did to get it working :

Step 1 : Create the Library

Create a New Project, using the built-in Cocoa Library template
Set Library type as Static.
Add your Classes/Functions/Whatever
Under Build Phases, take care of which headers are going to go Public.

Step 2 : Use the Library in a test project

Drag’n'drop the final .a library file into the project (doesn’t matter if you also copy it to the target directory)
Link against the library
Update the User Header Search Paths to your initial Library .a file origin (using recursion (like /the/path/to/your/library/folder/**)
Set Always search user paths to YES
Add -ObjC to Other Linker Flags, under Build Settings.