tableView(_:heightOfRow:)

Declaration

@MainActor optional func tableView(_ tableView: NSTableView, heightOfRow row: Int) -> CGFloat

Parameters

• tableView:

  The table view that sent the message.

• row:

  The row index.

Return Value

The height of the row. The height doesn’t include intercell spacing and must be greater than zero.

Discussion

Implement this method if your table supports varying row heights.

Although table views may cache the returned values, you should ensure that this method is efficient. When you change a row’s height you must invalidate the existing row height by calling noteHeightOfRows(withIndexesChanged:). NSTableView automatically invalidates its entire row height cache in response to calls to reloadData() or noteNumberOfRowsChanged().

If you call view(atColumn:row:makeIfNecessary:) or rowView(atRow:makeIfNecessary:) within your implementation of this method, the table view throws an exception.

See Also

Setting row and column size

• tableView(_:sizeToFitWidthOfColumn:)