NSMutableArray拡張（項目の移動）

@interface NSMutableArray (MoveObject)

- (void)moveObjectFromIndex:(NSUInteger)fromIndex toIndex:(NSUInteger)toIndex;

@end

@implementation NSMutableArray (MoveObject)

- (void)moveObjectFromIndex:(NSUInteger)fromIndex toIndex:(NSUInteger)toIndex

{

if (fromIndex > toIndex) {

id dummy = [[[NSObject alloc] init] autorelease];

id obj = [self objectAtIndex:fromIndex];

[self insertObject:dummy atIndex:fromIndex];

[self removeObject:obj];

[self insertObject:obj atIndex:toIndex];

[self removeObject:dummy];

}

else if (toIndex > fromIndex) {

id obj = [self objectAtIndex:fromIndex];

[self removeObject:obj];

[self insertObject:obj atIndex:toIndex];

}

}

@end

- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath

{

[self.dataList moveObjectFromIndex:sourceIndexPath.row toIndex:destinationIndexPath.row];

}