Xcode 4.1 three finger swipe to switch from .m to .h?

This is the SOLUTION

You get the three finger vertical swipe back in xcode on lion!

Unfortunately, I haven't been able to find a way around this so i went to the keyboard solution CTRL+COMMAND+UP

If someone comes across this with MacOS Big Sur, go to

System Preferences > Trackpad > More Gestures

and change the setting for "Swipe between pages" to either "Swipe with two or three fingers" or "Swipe with three fingers"

You can also do ALT+CMD+Carriage Return. That will give you the assistant editor with the counterpart file alongside.

CMD+Carriage Return will reverse that, showing you just the standard editor again.