Re: Need help with setNeedsDisplay - Another Update
Re: Need help with setNeedsDisplay - Another Update
- Subject: Re: Need help with setNeedsDisplay - Another Update
- From: Andy Lee <email@hidden>
- Date: Sat, 10 Mar 2007 21:43:32 -0500
On Mar 10, 2007, at 5:24 PM, Yevgeniy Goldberg wrote:
Getting rid of an instance of my custom view in the nib file did
not help.
In fact, after I deleted that instance from the nib nothing was
redrawing even after the window resize.
I am confused about the structure of your app. How could deleting
the custom view cause the custom view to correctly redraw, if it's no
longer there?
In any case, I'm sure you/we will get to the bottom of this!
You're *positive* you are calling setNeedsDisplay: where you think
you are? If you put an NSLog before and after it, you see the log
output? (Or you could use a breakpoint as Nick suggested.)
And are you positive drawRect: is *not* getting called? Can you
confirm this with a breakpoint or NSLog?
And you're positive the instance of the view that you're sending
setNeedsDisplay: to is the right instance? You could add an
awakeFromNib method to the custom view that just does this:
NSLog(@"awoke 0x%x", self);
And just before you call [self setNeedsDisplay:] you could do this:
NSLog(@"needs display: 0x%x", self);
And make sure the printed addresses are the same.
As a very blunt, "dumb" test, what if you add a button (or change the
action of an existing one) such that the target is the custom view
and *all* the action does is setNeedsDisplay:YES? Surely drawRect:
should get called then? (You'll need a breakpoint or NSLog to
confirm this, because no data will have changed.)
--Andy
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