One of the easiest ways to start hunting down memory leaks is to see if a view controller is not being deallocated. Most common reason being an object stored in an instance variable is (in)directly holding a reference the view controller.

Here's a tip I picked up from @0xced:

Create an Xcode symbolic breakpoint and set the following values:

• Symbol: -[UIViewController dealloc]
• Add an Action: Log Message
• Action value: --- dealloc @(id)[$arg1 description]@ @(id)[$arg1 title]@
• Add another Action: Sound
• Sound: Choose a sound

If you pop or dismiss a view controller and don't hear the sound, there's a leak.

Thanks @0xced!