Based on what I've read its generally considered bad to use sliding menus in iOS applications.
I've seen the argument against them but I dont feel they are inherently bad its just they don't fit into the iOS design aesthetics.
Personally I've gone for a full screen list of options as an equivalent in iOS.
I've actually been working on an object called Xmenu which is generic on one side and has 'plugins' for different use cases and platforms on the other. Not finished enough to share yet however.