---
title: delegate
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nstableview/delegate
---

# delegate

The table view’s delegate.

## Declaration

```swift
weak var delegate: (any NSTableViewDelegate)? { get set }
```

## Discussion

Discussion The delegate must conform to the NSTableViewDelegate protocol. Setting the delegate will implicitly reload the table view. Note that in versions of macOS prior to v10.12, the table view did not retain the delegate in a managed memory environment. Special Considerations When you set the table view’s delegate, it is automatically registered for the following notifications with the following delegate methods: The notification named selectionDidChangeNotification is configured to notify the delegate’s tableViewSelectionDidChange(_:). The notification named columnDidMoveNotification is configured to notify the delegate’s tableViewColumnDidMove(_:). The notification named columnDidResizeNotification is configured to notify the delegate’s tableViewColumnDidResize(_:). The notification named selectionIsChangingNotification is configured to notify the delegate’s tableViewSelectionIsChanging(_:). Setting the delegate to nil causes these notifications to be disconnected. Rather than setting the delegate to nil and listening for notifications (and expecting NSTableView to still function correctly) you should instead implement the appropriate delegate method.