With Auto Save enabled in a document, I find that Lion sometimes wants to break
into a sequence of operations to do an Auto Save. I haven't been able to find
any recommendation of how to tell Auto Save "No, I'm busy now". I just figured
out how to do it by overriding saveToURL::::.
It seems to work. I'd appreciate any criticisms:
- (void)saveToURL:(NSURL *)url
ofType:(NSString *)typeName
forSaveOperation:(NSSaveOperationType)saveOperation
completionHandler:(void (^)(NSError *errorOrNil))completionHandler {
if (saveOperation == NSAutosaveInPlaceOperation) {
if ([[[NSOperationQueue mainQueue] operations] count] != 0) {
// "No, I'm busy now"
// If you don't do this, it hangs forever…
completionHandler(nil) ;
return ;
}
}
// Optional…
[self prepareForSaveOperation:saveOperation] ;
[super saveToURL:url
ofType:typeName
forSaveOperation:saveOperation
completionHandler:completionHandler] ;
}
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