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

i download json data , populate custom uitableview, problem if calculate height of tableview based on amount of elements download cells doesn't fit whole height of tableview, final situation tableview n elements has height of n*100 cells fits part of it. code used calculate height:

//callback contains items 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 tried:

_customtableview.alwaysbouncevertical = no; _customtableview.scrollenabled = no; 

but no results.. how can tell cells fit height of cell?

to achieve scrollable table view, have use tableview:heightforrowatindexpath: delegate method specify size (height) or cell, not change frame of table view.

example:

- (cgfloat)tableview:(uitableview *)tableview heightforrowatindexpath:(nsindexpath *)indexpath {     //todo: calculate cell height     return 60.0f; } 

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to have cells visible on 1 screen, total height of table view cells has equal height of table view, height of 1 table view cell should be:

cgfloat cellheight = cgrectgetheight(tableview.frame) / numberofcells; 

however, don't understand why want this. whole reason of table view have fixed height cells , scroll (like settings app it).