Unrecognized selector sent to instance when creating cell - objective-c

Question

I'm trying to reuse cell created in my storyboard,
I'm using this code:
MyTableView * mytableview;
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
mytableview = [sb instantiateViewControllerWithIdentifier:#"myTable"];
AlertCell *cell;
cell = [mytableview.tableView dequeueReusableCellWithIdentifier:#"alertCell"];
cell.message.text = #"some text";
return cell;
I get this error:
[__NSArrayM objectForKeyedSubscript:]: unrecognized selector sent to instance 0xe02b7d0
this line eventually generates the error:
[mytableview.tableView dequeueReusableCellWithIdentifier:#"alertCell"];
The table view when using the cell is programaticlly created.
Everything i wanted works! but i got the errors in the log anyway
Thanks a lot!

Answer 1

You cannot create the table view when the cell is created.
You have to create the table view in a method that i called when the view controller is created, such as viewDidLoad.
Then in the cell method use the tableView pointer that is included in the method.
Also, the error actually indicates a problem with your datasource as well.
There are so many apparent knowledge gaps, maybe the best way is to read through the Table View Programming Guide.

Answer 2

I didn't exactly understand when you are creating table. You should not instantiate at the same time. Why you needed to call this line?
mytableview = [sb instantiateViewControllerWithIdentifier:#"myTable"];
If you want to use tableview, just create it normally and add it to your viewcontroller instead of using above line of code in viewDidLoad.
UITableView *tableView = [[UITableView alloc]initWithFrame:tableFrame style:UITableViewStylePlain];
tableView.rowHeight = 45;
[self.view addSubview:tableView];
tableView.delegate = self;
tableView.datasource = self;
Implement tableview's data source and delegate methods. And in cellForRowAtIndexPath::
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"newFriendCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"newFriendCell"];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
//do your stuff
return cell;
}