Adds a new row of cells below the last row, using the specified cells.
- macOS 10.0+
An array of objects to use to fill the new row, starting with the object at index 0. Each object should be an instance of
NSCellor one of its subclasses (usually
NSAction). The array should contain a sufficient number of cells to fill the entire row. Extra cells are ignored, unless the matrix is empty. In that case, a matrix is created with one row and enough columns for all the elements of
This method redraws the receiver. Your code may need to send
size after sending this method to resize the receiver to fit the newly added cells.