---
title: "attachPopUp(withFrame:in:)"
framework: appkit
role: symbol
role_heading: Instance Method
path: "appkit/nspopupbuttoncell/attachpopup(withframe:in:)"
---

# attachPopUp(withFrame:in:)

Sets up the receiver to display a menu.

## Declaration

```swift
func attachPopUp(withFrame cellFrame: NSRect, in controlView: NSView)
```

## Parameters

- `cellFrame`: The cell’s rectangle, specified in points in the coordinate system of the view in the controlView parameter. The menu is attached to this rectangle.
- `controlView`: The view in which to display the pop-up button’s menu.

## Discussion

Discussion This call sets up the popup button cell to display a menu, which occurs in performClick(withFrame:in:). This method sets the cell’s control view and then highlights and redraws the cell. It does not show the menu. This method also posts an willPopUpNotification. (The NSPopUpButton object sends a corresponding willPopUpNotification.) You normally do not call this method explicitly. It is called by the Application Kit automatically when the menu for the pop-up button is to be displayed.

## See Also

### Handling events and action messages

- [dismissPopUp()](appkit/nspopupbuttoncell/dismisspopup().md)
- [performClick(withFrame:in:)](appkit/nspopupbuttoncell/performclick(withframe:in:).md)