On 11 Aug 2009, at 08:00, Uli Kusterer wrote:
On Aug 10, 2009, at 6:04 PM, Christopher Campbell Jensen wrote:
I am sure I am just missing a single line of code, but I can't
understand the following behavior:
This code is where the issue occours:
- (void)refreshButtonsEnabledState
{
NSLog(@"%d", [[[tabView selectedTabViewItem] label]
isEqualToString:@"Current/Custom"] && [movieFile.movieMetaData
isCreated]);
[toggleWriteCheckMarksButton setEnabled:[[[tabView
selectedTabViewItem] label] isEqualToString:@"Current/Custom"] &&
[movieFile.movieMetaData isCreated]];
[resetMetaDataButton setEnabled:[movieFile.movieMetaData
isCreated]];
}
I presume tabView, movieFile, toggleWriteCheckMarksButton and
resetMetaDataButton are instance variables, and most of them are
outlets. Is any of them perhaps NIL at the point where your code
fails?
Cheers,
-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."
http://www.zathras.de
You are right, they are all instance variables and IBOutlets.
movieFile is nil at the point where the buttons fail to respond to the
change, but doesn't sending a message to nil return nil (ie false)? To
check when/if any of them were nil, I set a breakpoint and stepped
through the code pausing it each time "refreshButtonsEnabledState" was
called and it made me realise that the buttons fail to update their
state the first time the method gets called and movieFile is nil. When
I, at the end of the movie, again click on the second tab item,
"refreshButtonsEnabledState" gets called and at this point movieFile
is still nil. How come it works the second time around, and not the
first?
Cheers,
Chris
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