title: iOS: helpfulness of didReceiveMemoryWarning:
body: <p>I'm at the part of my development process for tracking down crashing and memory leaks. As a strategy, do you put any NSLog messages or notifications of some such into <code>didReceiveMemoryWarning:</code>? The documentation for this method is rather sparse. Is it accurate to say that before a crash will happen, the UIViewController will trigger that method? Is that a starting point before even going forward with Instruments?</p>