How to add Section and TableView Cell dynamically - iphone

Question

I have a button that when pressed, a tableview section will be added and will also add a new row to that section. How can I implement this programatically?
I have an array of cells.
Here are my codes
- (IBAction)addCell:(id)sender {
UITableViewCell *newCell = [[UITableViewCell alloc] init];
counter++;
[cells addObject:newCell];
[self.tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [cells count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//this is where i want to adjust the row per section
//this code hide the recent sections, only the current created section appears
return [cells objectAtIndex:indexPath.row];
}

Answer 1

Hi try reading this:
How to display the UITableView programmatically?
Adding cells programmatically to UITableView
Hope this could help you.

Answer 2

First, update your's datamodel(NSArray or mutable). Second, when you want tableview refresh, add a code [self.tableView reloadData];
oops, your code some strange uitaleviewDataSource, Delegate Method.
also, your have a some mistake.
why you implements numberOfRowsInSection return 1? very strange.
I apprecated below code.
CASE 1. No has DataModel.
- (IBAction)addCell:(id)sender
{
cellRowsCount++;
[self.tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return cellRowsCount;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
return cell;
}
your codes, dataModel(NSArray or mutable) does not necessarily need, so I simply rowCount variable added and your rowsCount of tableviewCell has synchronized.
If you wanna with DataModel, below CASE2. refer plz.
CASE2. has DataModel.
- (IBAction)addCell:(id)sender
{
textCount ++;
NSString *cellText = [NSString stringWithFormat:"blah %d", textCount];
[myArray addObject:cellText];
[self.tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [myArray count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[myArray objectAtIndex:section] count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = (NSString *)[myArray objectAtIndex:indexPath.row];
return cell;
}

Answer 3

You only have to add the new section and the new item to the array that holds the section and the items like so:
- (void)viewDidLoad
{
[super viewDidLoad];
animals = #{#"Section 1" : #[#"Item 1", #"Item 2", #"Item 3"],
#"Section 2" : #[#"Item 1", #"Item 2"]};
}
after that you just reload the tableView wherever your logic needs:
[self.tableView reloadData];