First thing first… The key mapping:

Keys

• ⌘ – Command
• ⇧ – Shift
• ⌥ – Option/Alt
• ⌃ – Control
• ⇠⇢ – Left/Right Arrow Keys
• ⇡⇣ – Up/Down Arrow Keys
• ⏎ – Return
• ⇥ – Tab
• ⎋ – Escape

Learning Xcode keyboard shortcuts will improve your workflow, productivity and make you a faster iOS or Mac app developer. There are many keyboard shortcuts in Xcode that can make yourself a more efficient programmer.

For more, you may be willing to watch this Sean Allen video: