Question: I'm new to xcode .I want to autoplay a sound when I open the app . I put the code in viewDidLoad but when I open other view and go back the sound play again .how can fix this problem ??

Answer: 
I just bumped into this feature by accident but looking up to see if I figure how to get to it. it looked like it popped up when I started typing after having launched eclipse without focusing on any particular view... more to come as soon as I find out for sure. 

EDIT: Apparently when you first launch Eclipse the focus is on the "Quick Action" search box on the top right of the tool bar and that's where you can start typing command names for it to list and let you pick in good Sublime Text style. Not sure how to shortcut into the box other than clicking it, but apparently there's the feature.

EDIT#2: <http://www.vogella.com/tutorials/EclipseShortcuts/article.html#shortcuts_overview> describes Ctrl+3 as being the shortcut to get there, on the Mac it translates to Cmd+3.
I haven't been able to find anything, so I have started on developing my own plugin.