After struggling for a day with this I finally found a solution. Here it
is:http://stackoverflow.com/questions/10442653/unrecognized-selector-calling-category-method-in-static-ios-library
The sample code is oncorrect, as it's missing some crucial pieces.
getInstance doesn't return any object unless you created it previously.
You can try something like this: AuthNet *an = [AuthNet getInstance]; if
(an == nil) an = [AuthNet authNetWithE...