Here is a category that makes an NSArrayController a valid IKImageBrowserDataSource. Additionally, the example implementations of imageBrowser:moveItemsAtIndexes:toIndex: I�ve seen are buggy. The one below seems to work flawlessly.

Note that if you have the array controller�s arrangedObjects bound as the content of the IKImageBrowserView, you still need to set the array controller as the IKImageBrowserView�s dataSource and to implement imageBrowser:moveItemsAtIndexes:toIndex to get rearranging to work. Hopefully Apple will fix that� � BryanWoods

// NSArrayController+IKImageBrowserDataSource.m

@implementation NSArrayController (IKImageBrowserDataSource)

• (NSUInteger) numberOfItemsInImageBrowser:(IKImageBrowserView *)browser { return self arrangedObjects] count]; }

• (id) imageBrowser:([[IKImageBrowserView *)browser itemAtIndex:(NSUInteger)index { return self arrangedObjects] objectAtIndex:index]; }

• (void) imageBrowser:([[IKImageBrowserView *)browser removeItemsAtIndexes:(NSIndexSet *)indexes { return [self removeObjectsAtArrangedObjectIndexes:indexes]; }

• (BOOL) imageBrowser:(IKImageBrowserView *)browser moveItemsAtIndexes:(NSIndexSet *)indexes toIndex:(NSUInteger)index { __block NSUInteger destination = index; [indexes enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL * stop) { if(idx < index) –destination; else *stop = YES; }];

  NSArray * items = self arrangedObjects] objectsAtIndexes:indexes];

  [self willChangeValueForKey:@”arrangedObjects”]; [self removeObjectsAtArrangedObjectIndexes:indexes];

  [items enumerateObjectsWithOptions:[[NSEnumerationReverse usingBlock:^(id item, NSUInteger idx, BOOL * stop) { [self insertObject:item atArrangedObjectIndex:destination]; }]; [self didChangeValueForKey:@”arrangedObjects”];

  [self performSelectorOnMainThread:@selector(setSelectionIndex:) withObject:(id)destination waitUntilDone:NO];

  return YES; }

@end