UITableView cells doesn't fit UITableView height - objective-c

Question

I download Json data and then I populate my custom UITableView, the problem is that even if I calculate the height of the tableview based on the amount of elements I download the cells doesn't fit the whole height of the tableview, So my final situation is a tableview with n elements that has height of n*100 but the cells just fits a part of it.
This is the code I used to calculate the height:
//callback that contains the items I download
-(void)productsDownloaded:(NSArray *)items
{
_productsDetails = items;
CGFloat height = 100;
height *= items.count;
CGRect tableFrame = _customTableView.frame;
tableFrame.size.height = height;
_customTableView.frame = tableFrame;
[_customTableView reloadData];
}
I also tried:
_customTableView.alwaysBounceVertical = NO;
_customTableView.scrollEnabled = NO;
But with no results.. How can I tell the cells to fit the height of the cell?

Answer 1

To achieve a scrollable table view, you have to use the tableView:heightForRowAtIndexPath: delegate method to specify the size (height) or your cell, not just change the frame of your table view.
Example:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
//TODO: Calculate cell height
return 60.0f;
}
To have all the cells visible on one screen, the total height of the table view cells has to be equal to the height of the table view, thus the height of one table view cell should be:
CGFloat cellHeight = CGRectGetHeight(tableView.frame) / numberOfCells;
However, I really don't understand why you would want to do this. The whole reason of a table view is to have a fixed height for cells and scroll (Like the Settings app does it).