---
title: NSComboBoxDelegate
framework: appkit
role: symbol
role_heading: Protocol
path: appkit/nscomboboxdelegate
---

# NSComboBoxDelegate

A set of optional methods implemented by delegates of combo box objects.

## Declaration

```swift
protocol NSComboBoxDelegate : NSTextFieldDelegate
```

## Topics

### Manipulating the selection

- [comboBoxSelectionDidChange(_:)](appkit/nscomboboxdelegate/comboboxselectiondidchange(_:).md)
- [comboBoxSelectionIsChanging(_:)](appkit/nscomboboxdelegate/comboboxselectionischanging(_:).md)
- [comboBoxWillDismiss(_:)](appkit/nscomboboxdelegate/comboboxwilldismiss(_:).md)
- [comboBoxWillPopUp(_:)](appkit/nscomboboxdelegate/comboboxwillpopup(_:).md)

## Relationships

### Inherits From

- [NSControlTextEditingDelegate](appkit/nscontroltexteditingdelegate.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSTextFieldDelegate](appkit/nstextfielddelegate.md)

## See Also

### Management

- [NSComboBoxDataSource](appkit/nscomboboxdatasource.md)