iOS的cellForRowAtIndexPath没有被调用但是numberOfRowsInSection被调用并返回一个数字

Question

My application is using JASidePanels libraries and I had set them using storyboard. The center view is a UITableView and the left panel is a view in which I call a method (by pressing a button)

- (IBAction)reloadAllFilters:(UIButton *)sender{

MasterViewController *masterController = [self.storyboard instantiateViewControllerWithIdentifier:@"centerViewController"];
NSMutableArray *arrayOfFilterIds = [[NSMutableArray alloc] init];

// another code

masterController.filterIdsToDisplay = arrayOfFilterIds;
[masterController.tableView reloadData];

[self.sidePanelController toggleLeftPanel:self];

}

The thing is, that when the app starts, the number of rows returned by number, but after I call this method, the number of rows is 30 but I cant see nothing.

I think that the problem is that I am instantiating a new masterController and therefor I cant get the actual table view to be displayed? Or am I wrong? Can you please help me?

Answer 1

Yes you are right. You create a new master controller every time you call the method

From UIStoryboard reference:

This method creates a new instance of the specified view controller each time you call it.

You need to get the existing one.

Answer 2

Please set the delegate and datasource to your tableview like this ...

  tableView.delegate = masterController;
  tableView.dataSource = masterController;