Keyboard shortcut for comment blocks /* ... */ in Xcode

It isn't as good as I'd like it to be, but this is the best option I've come up with so far. I created a few custom code snippets in Xcode, each of which replaces a shortcut with an appropriately sized comment block.

For example, I have it replace the shortcut "com1" with an 80-character-wide comment block (for non-indented lines). That's the following code in the Snippet Library in Xcode:

/*******************************************************************************<#comment#>******************************************************************************/

For indented lines, I have shortcuts "com2", "com3", and "com4", which are 76, 72, and 68 characters wide (respectively).

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Also, Xcode's documentation isn't that helpful when it comes to code snippets. To create a new code snippet, show the Utilities view (the pane on the right) and select the {} icon towards the bottom to show the Code Snippet Library. Select some code to add, and drag it over to the Code Snippet Library (by left-clicking and holding for a second and then dragging - as a Windows user it took me far too long to figure this out). This will create a new entry titled My Code Snippet at the very bottom of the Code Snippet Library, which you can mouse over and Edit to your liking.

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EDIT: Here I have uploaded a zip file containing five code snippets. Levels 1 through 4 (com1, com2, com3, com4) are 80, 76, 72, and 68 characters wide, respectively. Level 0 is a single line comment block that does not automatically format width (I use it for single comments to maintain formatting).

EDIT 2: Also, user code snippets are stored in ~/Library/Developer/Xcode/UserData/CodeSnippets/.

i reposted your question on apple dev forums .... i am also looking for the answer. here is a response i got ..... havent tried to do it yet but will soon.

in the WWDC 2012 video Session 402 - Working Efficiently with Xcode ( from around 6 minutes in) there's a description of how to use the Mac OSX Automator to add a service to manipulate selected text. The example shown in the video is to remove duplicates in a selection of text using the shell commands sort and uniq. Using this approach you could shell out to an awk

awk 'BEGIN{print "/"}{print $0}END{print "/"}'

which will, for any given selected text, put the comment delimiters before and after. Then add a shortcut to invoke this service.