Getting Notifications of isDocumentEdited

is it possible to bind/get notifications of the isDocumentEdited property of NSDocument witho开发者_C百科ut calling the will/didChangeValueForKey: methods on every change?

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Override -updateChangeCount: in your subclass so it posts an NSNotification or does whatever work you're after.

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I'll extend Mike Abdullah's answer:

To get bindings to work with isDocumentEdited, I implemented the following override on the NSDocument method:

- (void)updateChangeCount:(NSDocumentChangeType)change
{
    [self willChangeValueForKey:@"isDocumentEdited"];
    [super updateChangeCount:change];
    [self didChangeValueForKey:@"isDocumentEdited"];
}
- (void)updateChangeCountWithToken:(id)changeCountToken forSaveOperation:(NSSaveOperationType)saveOperation
{
    [self willChangeValueForKey:@"isDocumentEdited"];
    [super updateChangeCountWithToken:changeCountToken forSaveOperation:saveOperation];
    [self didChangeValueForKey:@"isDocumentEdited"];
}