Interface Builder Plugin Image inspector property problem on load

i have created a custom NSView that displays an image.

i have created a property in Inspector view with binding to File's Owner.

Everything works fine in runtime image changing. But nothing is loaded when i save and load xib file.

here is the simplified code:

IBDocument *document = [IBDocument documentForObject:self];
[self->defaultImage release];
self->defaultImage = [document documentImageNamed:aImage];
[self->defaultImage setName:aImage];
[self->defaultImage ret开发者_如何学Pythonain];

The [document documentImageNamed:aImage] returns an NSImage in runtime, but when loading from file it return nil

though the NSImageWell works fine in runtime and when initialized from coder.

What i'm missing?

Thans.

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You must implement NSCoding protocol for you custom object. http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Protocols/NSCoding_Protocol/Reference/Reference.html