Followed the codes in the book and did everything correct ( I think ) but i cant zoom in on architecture.jpg in the simulator. My double tap (well double click in my mac) doesn't zoom on it. Nothing happens, help anyone ?

Any warnings when you compile?
Either copy and paste your code in a reply, or send the nonworking project to
ipadhelper@me.com
and I will take a look at it for you. If the the issues are in outlet connections, then they will not be observable in code, only in the project.

Bob
i assume you are using the latest SDK and Xcode?

i got it already after some testing and help from other guys, thanks anyway tho