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nevyn/gist:1035354

Created June 20, 2011 09:21
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nil -[UIViewController navigationController]
Raw
gistfile1.m
(gdb) po [tabController objectAtIndex:1]
<SPNavigationController: 0x4c20a50>
(gdb) po [[tabController objectAtIndex:1] viewControllers]
<__NSArrayI 0x50bb480>(
<SearchViewController: 0x952920>
)
(gdb) po [[[tabController objectAtIndex:1] viewControllers] objectAtIndex:0]
<SearchViewController: 0x952920>
(gdb) po [[[[tabController objectAtIndex:1] viewControllers] objectAtIndex:0] navigationController]
Can't print the description of a NIL object.
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nevyn commented Jun 20, 2011

SPNavigationController is an almost trivial subclass of UINavigationController. tabController is a SPTabBarController, which is a subclass of UIViewController and a reimplementation of UITabBarController (for some extra fancy features).

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