How to periodically wake and check status in iOS?

Question

I want my app to periodically wake and check a status, but burn minimal cycles between wake ups. Is the a Core call for this or an accepted design pattern?

Answer 1

Prior to ios7, apps could only ask for execution cycles in background for a handful of purposes (eg playing sound or getting location updates). While they added more options in ios7, like periodically fetching data from a server, I'm still not clear there is a way to do this. (It's also a bit difficult for me to imagine why your app cares about battery if it isn't running, but maybe that is my failure of imagination.) Recommend reading Background Execution and Multitasking in the AppleDocs .