Re: yearly NSDraggingInfo -draggedImage question (BEWARE!)

FROM : Dave Hersey
DATE : Thu Mar 20 23:31:20 2008

Do you get anything different if you print the object as a pointer 
(%p)? Printing it as an int value is... weird.

Try:

    printf("Dragged Image: %p\n", (void *)[sender draggedImage]);

or

    NSLog(@"Dragged Image: %@", [[sender draggedImage] description]);

I dunno, it may still be nil, but the object you're interested in is 
definitely not an int.

- d

On Mar 20, 2008, at 6:15 PM, Nathan Vander Wilt wrote:
> ...
> I subclassed an NSImageView to turn it into a dropbox to help me 
> prototype a file-opening feature.
>
> I implemented the following method in my DropBox class:
>
> - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {
>     printf("Dragged Image: %x\n", (NSUInteger)[sender draggedImage]);
>     return NSDragOperationLink;
> }
>
> When I hover any file/folder from the Finder over this drop box, I 
> get:
> Dragged Image: 0
> in the debugging console. Likewise if I check it in my prepare/
> performDragOperation, this value is always nil.
>
> The documentation says nothing about this method ever returning nil, 
> so it's even more suprising to me that it would *always* return nil. 
> I would expect it to give back a reference to the file/folder icon 
> image that I'm dragging around underneath the cursor. Is that not 
> what this method is documented to do?
>
> thanks,
> -natevw