Just installed Xcode 4 so far so good, except that Apple changed all the keyboard shortcuts! Anyone know how to toggle between .h and .m?
Apple changed all sorts of shortcuts, but to swich between header and implementation, the new shortcut is,
⌃ + ⌘ + ↑/↓
You can change it back to the previous ⌥ + ⌘ + ↑/↓ in
If you are working on a big screen, you could use the Assistant layout's split view, and have the .h and .m files side by side.