A very simple NSOutlineView category which adds a method to fetch all the rows specified in an NSIndexSet with a single method call.

NSOutlineView (BSMultipleRowFetch) source preview

#import "NSOutlineView+BSMultipleRowFetch.h"

@implementation NSOutlineView (BSMultipleRowFetch)

- (NSArray *)itemsAtRows:(NSIndexSet *)indexes
{
  NSMutableArray *items = [NSMutableArray array];
  unsigned int i = [indexes firstIndex];
  
  while(i != NSNotFound)
  {
    [items addObject:[self itemAtRow:i]];
    i = [indexes indexGreaterThanIndex:i];
  }
  
  return [NSArray arrayWithArray:items];
}

@end

NSOutlineView (BSMultipleRowFetch) header preview

#import <Cocoa/Cocoa.h>

@interface NSOutlineView (BSMultipleRowFetch)

- (NSArray *)itemsAtRows:(NSIndexSet *)indexes;

@end

Compatible with:

• Mac OS X 10.3
• Mac OS X 10.4 PPC
• Mac OS X 10.4 Intel
• Mac OS X 10.5 PPC
• Mac OS X 10.5 Intel

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