Detecting the use of private APIs

Question

I'm being rejected on the App Store for using private instance variables in my app. The ivars I am supposedly using are most definitely not being accessed in my code, but I am using one or two static libs from third parties. How would I test whether these could actually be the offenders?

Update:

Apple is accusing me (and 3rd party libs) of using private instance variables in the UITouch class, including

• _locationInWindow
• _tapCount
• _previousLocationInWindow
• _timestamp
• _touchFlags
• _phase
• _window

Answer 1

For those who have many third-party libraries, can check your project in such a manner in your project path, for example if you want to find GraphicsService:

$ find . |grep "\\.a" | xargs grep GraphicsService

Answer 2

I am using one or two static libs from third parties

Contact the third parties, requesting explanation, they wrote the code, they must know what's in there. They might have a forum or a comments section, where other users might have expressed these concerns already, and you can look for answers and alternatives.

Answer 3

You can use nm to scan for which library uses the ivar in question.

% nm static_lib.a | grep name_of_ivar

If you get a line, I think with a capital U, with the name of the ivar you probably have a suspect.

Answer 4

I don't know anything about detecting the problem, but we encountered this problem recently; in our case it was caused by the Three20 library. If you are using it, see http://groups.google.com/group/three20/browse_thread/thread/c442af6e39a918b0/2375e7a158ee9d1b for a discussion/possible solutions.