View is null in viewDidLoad
I created UITabBarController
with each tab contain UINavigationController
and set rootviewcontroller in this UINavigationController
, all of this is done in interface builder. In viewDidLoad I try to get frame size from view, but when I reference view it return null. Have anyone experienced this before.
All IBoutlet are properly 开发者_如何学Pythonconnected.
viewDidLoad
returning a nil view if the view is connected in your .xib
could mean:
For programmatic initialisation (custom controllers):
- You forgot to call
initWithNibName:bundle:
on the view controller class altogether (you may have calledinit
or something instead). - You've overridden the
loadView
method in your view controller class, but it doesn't set theview
.
For all controllers:
- An outlet connection hasn't been made correctly.
- You have accidentally released the view or view controller before showing it.
- The
nibName
parameter was not properly specified when initialising the view (the nib could not be found or one without a view was found.. though this should also throw an exception). - There wasn't enough memory to allocate the
view
(the app would likely have been terminated by that point though).
I'd recommend you try doing frame size calculations in viewWillAppear:
instead and see if the view
is still nil
at that point.
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