Unable to add and delete rows simultaneously - ios

Question

I am following a tutorial,where I can expand the table view by adding some sub-cells and collapse the table by removing the sub-cells. I am trying to change how the expand operation should execute. When I tap on a row,it expand and shows the sub-cells,and when I tap on other row,the previous expanded row should close. I am not able to do this . I tried the following but I couldnt make the one row expandable at a time,and the other row should close when one expands.
Note: This code works fine,but to collapse the row,we need to tap twice on the same row. I am trying to collapse when other parent is tapped.
Here is the code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
Node *node = [self nodeForIndexPath:indexPath];
// differenet table view cell prototypes for different node levels
UITableViewCell *cell;
if(node.level == 0)
{
cell = [tableView dequeueReusableCellWithIdentifier:#"level1cell" forIndexPath:indexPath];
}
else
{
cell = [tableView dequeueReusableCellWithIdentifier:#"level2cell" forIndexPath:indexPath];
}
// set the nodes title as row text
cell.textLabel.text = node.title;
// attach the nodeId for later lookup when selected
cell.tag = node.nodeId;
// Configure the cell...
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
Node *node = [self nodeForIndexPath:indexPath];
// NSLog(#"node id is %ld level is %ld and indexpath.row is %d",(long)node.nodeId,(long)node.level,indexPath.row);
node.expanded = !node.expanded;
if (node.level==0) {
NSLog(#"you tapped parent");
//now check other parents are expanded or not
}else{
NSLog(#"you tapped child");
}
//insertion always happen after deletion
// NSLog(#"you touched at %#,index row is %d",indexPath,indexPath.row);
if(node.expanded )
{
// add n rows
NSMutableArray *indexPaths = [NSMutableArray array];
for(NSInteger i=indexPath.row; i< indexPath.row+node.subNodes.count; i++)
{
[indexPaths addObject:[NSIndexPath indexPathForRow:i+1 inSection:0]];
}
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
}
else
{
//you store the node refe after row is expanded
// delete n rows
NSMutableArray *indexPaths = [NSMutableArray array];
for(NSInteger i=indexPath.row; i< indexPath.row+node.subNodes.count; i++)
{
[indexPaths addObject:[NSIndexPath indexPathForRow:i+1 inSection:0]];
}
[self.tableView beginUpdates];
[self.tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
}
}
#pragma mark - Private helper
-(Node*) nodeForIndexPath:(NSIndexPath*)indexPath
{
int idx = 0;
for(Node *node in _nodes)
{
if(idx == indexPath.row)
{
return node;
}
idx++;
if(node.expanded)
{
for (Node *subNode in node.subNodes)
{
if(idx == indexPath.row)
{
return subNode;
}
idx++;
}
}
}
return nil;
}

Answer 1

KMAccordionTableViewController can helps you?
https://github.com/klevison/KMAccordionTableViewController

Answer 2

Hm... If your current code is working, but you need to tap twice to collapse the open/selected row, perhaps it's because didDeselectRowAtIndexPath: is being called during that first tap in place of didSelectRowAtIndexPath: in order to deselect the selected row. I'd recommend configuring your tableview to allow for multiple selection so that didSelectRowAtIndexPath: is called every time, ex:
- (void)viewDidLoad {
[super viewDidLoad];
tableView.allowsMultipleSelection = YES;
}