---
title: QCCompositionPickerView
framework: quartz
role: symbol
role_heading: Class
path: quartz/qccompositionpickerview
---

# QCCompositionPickerView

The QCCompositionPickerView class allows users to browse compositions that are in the Quartz Composer composition repository, and to preview them. You can set the default input parameters for a composition preview  by using the method setDefaultValue:forInputKey:.

## Declaration

```swift
class QCCompositionPickerView
```

## Overview

Overview Note that the composition picker view does not automatically refresh its content when the composition repository is updated. It’s your responsibility to perform any necessary updating.

## Topics

### Setting and Getting the Background Color

- [setBackgroundColor(_:)](quartz/qccompositionpickerview/setbackgroundcolor(_:).md)
- [backgroundColor()](quartz/qccompositionpickerview/backgroundcolor().md)

### Managing Background Drawing

- [setDrawsBackground(_:)](quartz/qccompositionpickerview/setdrawsbackground(_:).md)
- [drawsBackground()](quartz/qccompositionpickerview/drawsbackground().md)

### Setting Composition Input Parameters

- [setDefaultValue(_:forInputKey:)](quartz/qccompositionpickerview/setdefaultvalue(_:forinputkey:).md)
- [resetDefaultInputValues()](quartz/qccompositionpickerview/resetdefaultinputvalues().md)

### Managing Animation

- [startAnimation(_:)](quartz/qccompositionpickerview/startanimation(_:).md)
- [stopAnimation(_:)](quartz/qccompositionpickerview/stopanimation(_:).md)
- [isAnimating()](quartz/qccompositionpickerview/isanimating().md)
- [setMaxAnimationFrameRate(_:)](quartz/qccompositionpickerview/setmaxanimationframerate(_:).md)
- [maxAnimationFrameRate()](quartz/qccompositionpickerview/maxanimationframerate().md)

### Controlling Display of Composition Names

- [setShowsCompositionNames(_:)](quartz/qccompositionpickerview/setshowscompositionnames(_:).md)
- [showsCompositionNames()](quartz/qccompositionpickerview/showscompositionnames().md)

### Setting and Retrieving the View Delegate

- [setDelegate(_:)](quartz/qccompositionpickerview/setdelegate(_:).md)
- [delegate()](quartz/qccompositionpickerview/delegate().md)

### Managing the Composition Picker View

- [setCompositionsFromRepositoryWithProtocol(_:andAttributes:)](quartz/qccompositionpickerview/setcompositionsfromrepositorywithprotocol(_:andattributes:).md)
- [compositions()](quartz/qccompositionpickerview/compositions().md)
- [setAllowsEmptySelection(_:)](quartz/qccompositionpickerview/setallowsemptyselection(_:).md)
- [allowsEmptySelection()](quartz/qccompositionpickerview/allowsemptyselection().md)
- [setCompositionAspectRatio(_:)](quartz/qccompositionpickerview/setcompositionaspectratio(_:).md)
- [compositionAspectRatio()](quartz/qccompositionpickerview/compositionaspectratio().md)
- [setSelectedComposition(_:)](quartz/qccompositionpickerview/setselectedcomposition(_:).md)
- [selectedComposition()](quartz/qccompositionpickerview/selectedcomposition().md)

### Working with Columns and Rows

- [setNumberOfColumns(_:)](quartz/qccompositionpickerview/setnumberofcolumns(_:).md)
- [numberOfColumns()](quartz/qccompositionpickerview/numberofcolumns().md)
- [setNumberOfRows(_:)](quartz/qccompositionpickerview/setnumberofrows(_:).md)
- [numberOfRows()](quartz/qccompositionpickerview/numberofrows().md)

## Relationships

### Inherits From

- [NSView](appkit/nsview.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSAccessibilityElementProtocol](appkit/nsaccessibilityelementprotocol.md)
- [NSAccessibilityProtocol](appkit/nsaccessibilityprotocol.md)
- [NSAnimatablePropertyContainer](appkit/nsanimatablepropertycontainer.md)
- [NSAppearanceCustomization](appkit/nsappearancecustomization.md)
- [NSCoding](foundation/nscoding.md)
- [NSDraggingDestination](appkit/nsdraggingdestination.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSStandardKeyBindingResponding](appkit/nsstandardkeybindingresponding.md)
- [NSTouchBarProvider](appkit/nstouchbarprovider.md)
- [NSUserActivityRestoring](appkit/nsuseractivityrestoring.md)
- [NSUserInterfaceItemIdentification](appkit/nsuserinterfaceitemidentification.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Classes

- [QCComposition](quartz/qccomposition.md)
- [QCCompositionLayer](quartz/qccompositionlayer.md)
- [QCCompositionParameterView](quartz/qccompositionparameterview.md)
- [QCCompositionPickerPanel](quartz/qccompositionpickerpanel.md)
- [QCCompositionRepository](quartz/qccompositionrepository.md)
- [QCPatchController](quartz/qcpatchcontroller.md)
- [QCPlugIn](quartz/qcplugin.md)
- [QCPlugInViewController](quartz/qcpluginviewcontroller.md)
- [QCRenderer](quartz/qcrenderer.md)
- [QCView](quartz/qcview.md)