When the table "wants" to display itself, it will call these two
methods to display each cell in the table. When the method
"tableView:objectValueForTableColumn:row:" is called, you can identify
the cell to display by getting the column identifier and row number.
You then return the value to be displayed in the cell.
You let the table instance in Interface Builder know about your data
source class by instantiating the data source class in Interface
Builder. Then draw a connection from the table to the data source, and
select "dataSource" as an outlet.
Chapter 9 of "Learning Cocoa with Objective-C (second edition)" has a
table example.
My data source has to know about the index of a column to return it's
data.
Is there any way to query a column for its index/position in the
tableView?
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