There is a problem with adding files with extension .a to subversion. extension .a is compilated code in objective-c and there for useful to add to svn, mostly if you are group of developers so they can compile the checked out code. The reason it cant be added is because it exists in the global ignore list. You can change it if you want through the terminal, i guess it exist there for a reason so i have not done this.

The way i do it is by renaming it prior to adding, like codeexample.rename, add it, commiting, then use the svn rename and rename it back to .a. Now you can commit the changes and voilá, it exist in your repository.