Inserts a new column of cells at the specified location. .
- macOS 10.0+
The number of the column before which the new column is inserted. If
columnis greater than the number of columns in the receiver, enough columns are created to expand the receiver to be
New cells are created if needed with
make. 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.
If the number of rows or columns in the receiver has been changed with
renew, new cells are created only if they’re needed. This fact allows you to grow and shrink an
NSMatrix without repeatedly creating and freeing the cells.