- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.

NSDictionary *dic = [[NSDictionary alloc]initWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"data" ofType:@"plist"]];
self.items = [dic valueForKey:@"Items"];
self.itemsInTable = [[NSMutableArray alloc]init];
[self.itemsInTable addObjectsFromArray:self.items];

}

#pragma mark - Table Configuration

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
 }

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
  {
return [self.itemsInTable count];
   }

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
static NSString *simpleTableIdentifier = @"SimpleTableItem";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}

cell.textLabel.text = [[self.itemsInTable objectAtIndex:indexPath.row]valueForKey:@"Name"];
cell.textLabel.textAlignment = NSTextAlignmentRight;

return cell;
   }

  -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
   NSDictionary *dic=[self.itemsInTable objectAtIndex:indexPath.row];
   if([dic valueForKey:@"SubItems"])
{
    NSArray *arr=[dic valueForKey:@"SubItems"];
    BOOL isTableExpanded=NO;

    for(NSDictionary *subitems in arr )
    {
        NSInteger index=[self.itemsInTable indexOfObjectIdenticalTo:subitems];
        isTableExpanded=(index>0 && index!=NSIntegerMax);



        if(isTableExpanded) break;
    }

    if(isTableExpanded)
    {
        [self CollapseRows:arr];
    }
    else
    {
        NSUInteger count=indexPath.row+1;
        NSMutableArray *arrCells=[NSMutableArray array];
        for(NSDictionary *dInner in arr )
        {
            [arrCells addObject:[NSIndexPath indexPathForRow:count inSection:0]];
            [self.itemsInTable insertObject:dInner atIndex:count++];

        }
        [self.menuTableView insertRowsAtIndexPaths:arrCells withRowAnimation:UITableViewRowAnimationRight];
                }


}

}

-(void)CollapseRows:(NSArray*)ar
  {
for(NSDictionary *dInner in ar )
{
    NSUInteger indexToRemove=[self.itemsInTable indexOfObjectIdenticalTo:dInner];
    NSArray *arInner=[dInner valueForKey:@"SubItems"];
    if(arInner && [arInner count]>0)
    {

        [self CollapseRows:arInner];
    }

    if([self.itemsInTable indexOfObjectIdenticalTo:dInner]!=NSNotFound)
    {
        [self.itemsInTable removeObjectIdenticalTo:dInner];
        [self.menuTableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:
                                                    [NSIndexPath indexPathForRow:indexToRemove inSection:0]
                                                    ]
                                  withRowAnimation:UITableViewRowAnimationRight];
    }
}
  }