My application displays a potentially long list of items in an NSTableView. One
of the columns represents files on the user's hard drive. This column is driven
by the new bookmark data from the NSURL class. The bookmark data does not
appear to be able to save effective icon data, however other data does work.
Does anyone know of a way to get this to store the icon data?
Bookmark data for a given item is created as follows:
[[openPanel URL] bookmarkDataWithOptions:0
includingResourceValuesForKeys:
[NSArray
arrayWithObjects:NSURLEffectiveIconKey,NSURLLocalizedNameKey,Nil]
relativeToURL:Nil error:Nil]
According to the docs this should create bookmark data that also includes the
file's effective icon and localized name data so that I can access those two
items without resolving the bookmarks. I would like to avoid resolving every
bookmark in the table when they are displayed for performance reasons and
because I don't want the user to be presented with bookmark resolution dialogs
as they scroll through the list.
In my NSCell subclass I load the bookmark data as follows:
resources = [NSURL resourceValuesForKeys:[NSArray
arrayWithObjects:NSURLEffectiveIconKey, NSURLLocalizedNameKey, Nil]
fromBookmarkData:obj];
if ( resources ) {
[self setFileIcon:[resources
objectForKey:NSURLEffectiveIconKey]];
[self setFileName:[resources
objectForKey:NSURLLocalizedNameKey]];
return;
}
The result is that the name is displayed but the file icon is Nil. Stepping
through the code shows that the resources dictionary only contains one entry
(the localized name) instead of the expected two entries so the icon data is
not being stored or retrieved. As far as I can see this behavior (inability to
store icon data with the bookmark) is not documented anywhere.
-Noah
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