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I'm querying in an iOS app in a Viewcontroller with a TableView. I want to be guaranteed my query has returned before I want to proceed to load the TableView. Is there a way to guarantee the query has finished?

jshah
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    See [How do I wait for an asynchronously dispatched block to finish?](http://stackoverflow.com/questions/4326350/how-do-i-wait-for-an-asynchronously-dispatched-block-to-finish). Semaphores are what you're looking for here. – Rob DiMarco Feb 06 '15 at 18:20
  • Also see Frank's [authoritative discussion of async and AngularFire](http://stackoverflow.com/questions/27049342/impossible-to-access-array-with-angular-and-firebase). – Kato Feb 09 '15 at 17:22

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