Many thanks both for your replies.
As it happens, I need to slap my own forehead for stupidity. I mentioned in my
e-mail that returning an error with NSLocalizedDescriptionKey and
NSLocalizedRecoverySuggestionErrorKey "used to work", and then foolishly
assumed it had been an update in Snow Leopard that must have changed something.
But of course, I was just being an idiot. After reading your replies and
hearing that what I was doing *should* work, I created a dummy project and
tried doing the same there (sorry, I really should have done that before
posting). And of course, it worked fine. So something in my rather large
project has obviously broken the way errors are displayed.
As I say, I have two problems:
First, if I do this in -readFromURL:ofType:error:
if (outError)
{
NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];
[userInfo setObject:NSLocalizedString(@"Invalid XML Data", @"")
forKey:NSLocalizedDescriptionKey];
[userInfo setObject:NSLocalizedString(@"The document cannot be loaded because
the XML file contained invalid characters.",nil) forKey:
NSLocalizedRecoverySuggestionErrorKey];
*outError = [NSError errorWithDomain:@"" code:0 userInfo:userInfo];
}
only the NSLocalizedDescriptionKey gets displayed in the resulting error panel
- the recovery suggestion is ignored (even if I enter a domain and non-zero
code).
Secondly, if I do this:
if (outError)
*outError = [NSError errorWithDomain:NSCocoaErrorDomain
code:NSUserCancelledError userInfo:nil];
to cancel the error, I still get a panel saying nothing more than "Alert".
Well, the second problem was easy enough - it was down to a coding mistake on
my part. My NSApp delegate implements -application:openFile: and after its call
to NSDocumentController's -openDocumentWithContentsOfURL:display:error:,
instead of calling NSDocumentController's -presentError: message, I was calling
[[NSAlert alertWithError:error] runModal]. So obviously the cancelled error was
getting put up here, duh.
So that just leaves me to figure out how on earth I have screwed things up so
that the default error handling doesn't show
NSLocalizedRecoverySuggestionErrorKey. Clearly something in my code is
preventing this from happening, although I'm not sure what now. I tried
commenting out -application:openFile: altogether to allow the file to be opened
without any of my custom handling procedures, but the error still didn't show
the recovery suggestion.
Does anyone have any ideas about how you can mess things up so that the
recovery error wouldn't be shown?
Many thanks and all the best,
Keith
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