Quickly jumping to the next issueThere is a keyboard shortcut in Xcode which let's you jump to the next issue (warning or error). The default shortcut for this is ⌘'. This is extremely handy - especially if you have a "zero-warning policy" because then every issue is worth fixing immediately: You won't jump to an issue which you can fix later or which is not really an issue.
I decided to assign the "Jump to Next Issue" command a simple shortcut just to make things easier for me. Because I have a German keyboard i am using ⌘Ä to jump to the next issue and ⌘Ö to jump to the previous issue.
You may have to restart Xcode for the new key bindings to take effect.