Please provide sample code for how to migrate from the deprecated
- (id)openDocumentWithContentsOfURL:(NSURL *)absoluteURL
display:(BOOL)displayDocument error:(NSError **)outError
to the new approved
-[NSDocumentController openDocumentWithContentsOfURL:display:completionHandler:]
In our case, there can only be one document open at a time.
However, NSDocument is useful for save, revert, edit, NSUndoManager, etc.
The Cocoa docs state that NSDocumentController should rarely need to be
subclassed.
However, in Lion, I'm at a loss for why its complaining to me:
-[NSDocumentController
openDocumentWithContentsOfURL:display:completionHandler:] failed during state
restoration. Here's the error:
"The document “test.mboxshow” could not be opened. MyApp cannot open files in
the “"MyApp.app Document” format.
Why is there no standard sample project for a standard
NSDocumentController/NSDocument based app?
There is no sample code for the new -[NSDocumentController
openDocumentWithContentsOfURL:display:completionHandler:]
Apple developers need to understand that writing a sample app must be part of
publishing any new API, otherwise they must expect developers to misuse their
class.
My attempts to override the new function instead does bad things… like no new
windows can be drawn.
My app seems to randomly do bad things, similar to what happens when there is
an uncaught exception,
although I see no exceptions being thrown.
Cocoa spits out no log messages, and I have exhausted every conceivable debug
method (NSException catch, NSZombie, MallocDebug, etc etc)
For what its worth, my now deprecated NSDocumentController override never gets
called,
whether I override the new method or not.
I'm open to suggestions for an alternate method of achieving this:
- (id)openDocumentWithContentsOfURL:(NSURL *)absoluteURL
display:(BOOL)displayDocument error:(NSError **)outError
{
if ( outError )
*outError = nil;
NSLog( @"openDocumentWithContentsOfURL %@", absoluteURL);
NSString *path = [absoluteURL path];
if ( [absoluteURL isFileURL] && [[path pathExtension] isEqualToString:
kMbEConsoleFileExtension] )
{
MbDocument *currShow = [self mbdocument];
NSString *currShowPath = [currShow filePath];
NSInteger retVal;
if ( !( [[MbEController instance] isFinishedLaunching] &
kFinishedPreLaunchCheck) )
{
// user double-clicked a file to start Director
currShowPath = [[NSUserDefaults standardUserDefaults]
objectForKey:@"LastSaveFile"];
if ( [currShowPath isEqualToString: path] )
{
if ( [[[NSUserDefaults standardUserDefaults]
objectForKey:@"isDocumentEdited"] boolValue] == YES )
{
retVal = NSRunAlertPanel(@"Open Show File", @"Revert to Saved?",
@"Revert to Saved", @"Keep Changes", NULL);
if ( retVal == NSAlertDefaultReturn )
{
[[MbEController instance] openShowFile:path];
}
}
return currShow; // proceed with normal startup
}
}
if ( [currShowPath isEqualToString: path] )
{
NSLog( @"is edited %d currShow %@", [currShow isDocumentEdited],
currShow );
if ( [currShow isDocumentEdited] )
[currShow revertDocumentToSaved:self]; // will prompt
else // document is already open, so do what Apple's standard action
is...
[currShow showWindows];
}
else
{
if ( [currShow isDocumentEdited] )
retVal = NSRunAlertPanel(@"Open Show File", [NSString
stringWithFormat: @"The current show file has unsaved changes. Discard unsaved
changes and switch to show file '%@'?", path], @"Discard unsaved changes and
switch to show", @"Keep Current", NULL);
else
retVal = NSRunAlertPanel(@"Switch to Show File", [NSString
stringWithFormat: @"Switch to Show File '%@'?\n\nCurrent show file '%@'", path,
currShowPath ? currShowPath : @"Untitled"], @"Switch", @"Keep Current", NULL);
if ( retVal == NSAlertDefaultReturn )
[[MbEController instance] openShowFile:path];
}
// user cancelled
return currShow;
}
return [super openDocumentWithContentsOfURL:absoluteURL
display:displayDocument error:outError];
}
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