Archiving and NSView Subclasses
Archiving and NSView Subclasses
- Subject: Archiving and NSView Subclasses
- From: Jeff LaMarche <email@hidden>
- Date: Tue, 30 Aug 2005 19:27:38 -0400
Thanks everyone who responded to my earlier issue. Seems I did
something rather stupid, which was to add the view I was palettizing
to the wrong target - the palette rather than the framework target.
Now I've hit something frustrating, and I hope it's not something
just as stupid. My palette is working great - I've got bindings
working, the inspector working, everything seems great until I go to
run a program that uses the palettized view. When the program
launches, I get a SIGTRAP after getting this error message:
2005-08-30 19:10:59.144 SWSpiralViewTester[2467] An uncaught
exception was raised
2005-08-30 19:10:59.145 SWSpiralViewTester[2467] *** -
[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of
class (SWSpiralView)
2005-08-30 19:10:59.146 SWSpiralViewTester[2467] *** Uncaught
exception: <NSInvalidUnarchiveOperationException> *** -
[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of
class (SWSpiralView)
Now, I've implemented initWithCoder: and encodeWithCoder: for this
view, and support keyed archiving in them. I peppered the methods
with NSLog calls, and everything is working as expected within
Interface Builder, but my initWithCoder does not appear to be getting
called before the error above - I can't find evidence of the NSLog
entries (which I didn't include in the code sample below) for
initWithCoder: in my application's run log, or anywhere in
Console.app (not sure where it would go being code from a framework -
the entries go into Console.app when I'm running IB).
Here's the NSCoding methods I've implemented:
- (void)encodeWithCoder:(NSCoder *)coder
{
[super encodeWithCoder:coder];
if ([coder allowsKeyedCoding])
{
[coder encodeObject:[self color] forKey:@"color"];
[coder encodeInt:[self gap] forKey:@"gap"];
}
else
{
[coder encodeObject:[self color]];
[coder encodeValueOfObjCType:@encode(int) at:&gap];
}
}
- (id)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self)
{
if ([coder allowsKeyedCoding])
{
[self setColor:[coder decodeObjectForKey:@"color"]];
[self setGap:[coder decodeIntForKey:@"gap"]];
}
else
{
[self setColor:[coder decodeObject]];
[coder decodeValueOfObjCType:@encode(int) at:&gap];
}
}
return self;
}
If anyone knows what I'm doing wrong, I'd love to hear it.
Thanks,
Jeff
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