Called by the picker view when it needs the view to use for a given row in a given component.
- iOS 2.0+
An object representing the picker view requesting the data.
A zero-indexed number identifying a row of
component. Rows are numbered top-to-bottom.
A zero-indexed number identifying a component of
picker. Components are numbered left-to-right.
A view object that was previously used for this row, but is now hidden and cached by the picker view.
If the previously used view (the
view parameter) is adequate, return that. If you return a different view, the previously used view is released. The picker view centers the returned view in the rectangle for