The
datasource is an object that implements the required datasource
protocol that is needed to create a complex control.
Ex UITableView is a view that
needs a datasource object to which will help building the table.
Often it's the controller that is displaying the table view. The
protocol that dataSource object ( mostly controller it self) has to
implement is “UITableViewDataSource” .
To understand it follow step by step by Process
Step1
When we doesn't connect table view datasource to File owner it show output in iPhone.
Output in iPhone
Here it doesn't show data which is passing using array.
Step2
When we connect table view datasource to File owner it show output in iPhone.
Output in iPhone
Here it show data which is passing using array.