Add and delete rows dynamically in multiple sections - ios

Question

I have searched and search and i just can´t seem to find an answer to my problem. I have a dynamic tableview with 3 rows (each row is a section) and a edit button at the top right of the tableview. each time the user taps edit it has to be possible to add or delete a row. Everything works except the part when the + button is taped to ad a new row. This is my code:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 3;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
int count = [myarray count];
if (myarray != nil) count ++;
return count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
id cell;
switch(indexPath.section) {
case 0:
if(indexPath.row==0) {
static NSString *cellType1 = #"cellType1";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellType1];
return cell;
}
break;
case 1:
if(indexPath.row==0) {
static NSString *cellType2= #"cellType2";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellType2];
return cell;
}
break;
case 2:
if(indexPath.row==0) {
static NSString *cellType3= #"cellType3";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellType3];
return cell;
}
break;
default:
break;
}
return cell;
}
- (IBAction) EditTable:(id)sender
{
if(self.editing)
{
[super setEditing:NO animated:NO];
[Table setEditing:NO animated:NO];
[Table reloadData];
[self.navigationItem.rightBarButtonItem setTitle:#"Edit"];
[self.navigationItem.rightBarButtonItem setStyle:UIBarButtonItemStylePlain];
}
else
{
[super setEditing:YES animated:YES];
[Table setEditing:YES animated:YES];
[Table reloadData];
[self.navigationItem.rightBarButtonItem setTitle:#"Ok"];
[self.navigationItem.rightBarButtonItem setStyle:UIBarButtonItemStyleDone];
}
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (self.editing == NO || !indexPath) return UITableViewCellEditingStyleNone;
if (self.editing && indexPath.row == ([myarray count]))
{
return UITableViewCellEditingStyleInsert;
} else
{
return UITableViewCellEditingStyleDelete;
}
return UITableViewCellEditingStyleNone;
}
- (void)tableView:(UITableView *)TableView commitEditingStyle: (UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
[myarray removeObjectAtIndex:indexPath.row];
[Table reloadData];
} else if (editingStyle == UITableViewCellEditingStyleInsert)
{
switch(indexPath.section) {
case 0:
if(indexPath.row==0) {
static NSString *cellType1 = #"cellType1";
UITableViewCell *cell = [TableView dequeueReusableCellWithIdentifier:cellType1];
[arry insertObject:cell atIndex:[myarray count]];
[Table reloadData];
}
break;
case 1:
if(indexPath.row==0) {
static NSString *cellType2= #"cellType2";
UITableViewCell *cell = [TableView dequeueReusableCellWithIdentifier:cellType2];
[arry insertObject:cell atIndex:[myarray count]];
}
break;
case 2:
if(indexPath.row==0) {
static NSString *cellType3= #"cellType3";
UITableViewCell *cell = [TableView dequeueReusableCellWithIdentifier:cellType3];
[arry insertObject:cell atIndex:[myarray count]];
}
break;
default:
break;
}
}
As i said before, everything works until i press the + button (that appears on the left side when the edit button is pressed) to add a new row. Then it shows an error: 'UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath.
What am i doing wrong? any help would be most appreciated.

Answer 1

First off, you never actually +alloc or -init a cell, so -cellForRowAtIndexPath: is most likely returning nil (-dequeueReusableCellWithIdentifier: doesn't cut it).
Second off, comparing indexPath.row to [myarray count] will never be true, because arrays and tables may be zero-based, but their counts aren't.