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# UIDynamicItem

A set of methods that can make a custom object eligible to participate in UIKit Dynamics.

```
@MainActor protocol UIDynamicItem : NSObjectProtocol
```

## Overview

Starting in iOS 7, the [`UIView`](/documentation/UIKit/UIView) and [`UICollectionViewLayoutAttributes`](/documentation/UIKit/UICollectionViewLayoutAttributes) classes implement this protocol.

## Topics

### Participating in dynamic animation

[`bounds`](/documentation/UIKit/UIDynamicItem/bounds)

Called when a dynamic animator needs the bounds of the dynamic item.

[`center`](/documentation/UIKit/UIDynamicItem/center)

The center point of the dynamic item.

[`transform`](/documentation/UIKit/UIDynamicItem/transform)

The rotation of the dynamic item.

[`collisionBoundsType`](/documentation/UIKit/UIDynamicItem/collisionBoundsType)

The type of collision bounds associated with the item.

[`collisionBoundingPath`](/documentation/UIKit/UIDynamicItem/collisionBoundingPath)

The path-based shape to use for the collision bounds.

### Constants

[`UIDynamicItemCollisionBoundsType`](/documentation/UIKit/UIDynamicItemCollisionBoundsType)

Constants that indicate the shape of the item’s collision bounds.

## Relationships

### Conforming Types

[`UIActivityIndicatorView`](/documentation/UIKit/UIActivityIndicatorView)

[`UITextField`](/documentation/UIKit/UITextField)

[`UIStepper`](/documentation/UIKit/UIStepper)

[`UIInputView`](/documentation/UIKit/UIInputView)

[`UIStackView`](/documentation/UIKit/UIStackView)

[`UISearchTextField`](/documentation/UIKit/UISearchTextField)

[`UISlider`](/documentation/UIKit/UISlider)

[`UIView`](/documentation/UIKit/UIView)

[`UICollectionViewLayoutAttributes`](/documentation/UIKit/UICollectionViewLayoutAttributes)

[`UIPasteControl`](/documentation/UIKit/UIPasteControl)

[`UIControl`](/documentation/UIKit/UIControl)

[`UIAlertView`](/documentation/UIKit/UIAlertView)

[`UISegmentedControl`](/documentation/UIKit/UISegmentedControl)

[`UINavigationBar`](/documentation/UIKit/UINavigationBar)

[`UIPageControl`](/documentation/UIKit/UIPageControl)

[`UIPickerView`](/documentation/UIKit/UIPickerView)

[`UICalendarView`](/documentation/UIKit/UICalendarView)

[`UIWindow`](/documentation/UIKit/UIWindow)

[`UIProgressView`](/documentation/UIKit/UIProgressView)

[`UIVisualEffectView`](/documentation/UIKit/UIVisualEffectView)

[`UITableView`](/documentation/UIKit/UITableView)

[`UIColorWell`](/documentation/UIKit/UIColorWell)

[`UIImageView`](/documentation/UIKit/UIImageView)

[`UIToolbar`](/documentation/UIKit/UIToolbar)

[`UIEventAttributionView`](/documentation/UIKit/UIEventAttributionView)

[`UIScrollView`](/documentation/UIKit/UIScrollView)

[`UIListContentView`](/documentation/UIKit/UIListContentView)

[`UICollectionReusableView`](/documentation/UIKit/UICollectionReusableView)

[`UICollectionView`](/documentation/UIKit/UICollectionView)

[`UIButton`](/documentation/UIKit/UIButton)

[`UITextView`](/documentation/UIKit/UITextView)

[`UIDatePicker`](/documentation/UIKit/UIDatePicker)

[`UIContentUnavailableView`](/documentation/UIKit/UIContentUnavailableView)

[`UISwitch`](/documentation/UIKit/UISwitch)

[`UITableViewHeaderFooterView`](/documentation/UIKit/UITableViewHeaderFooterView)

[`UIRefreshControl`](/documentation/UIKit/UIRefreshControl)

[`UIPopoverBackgroundView`](/documentation/UIKit/UIPopoverBackgroundView)

[`UICollectionViewCell`](/documentation/UIKit/UICollectionViewCell)

[`UIActionSheet`](/documentation/UIKit/UIActionSheet)

[`UITableViewCell`](/documentation/UIKit/UITableViewCell)

[`UITabBar`](/documentation/UIKit/UITabBar)

[`UIWebView`](/documentation/UIKit/UIWebView)

[`UICollectionViewListCell`](/documentation/UIKit/UICollectionViewListCell)

[`UILabel`](/documentation/UIKit/UILabel)

[`UIDynamicItemGroup`](/documentation/UIKit/UIDynamicItemGroup)

[`UIBackgroundExtensionView`](/documentation/UIKit/UIBackgroundExtensionView)

[`UIStandardTextCursorView`](/documentation/UIKit/UIStandardTextCursorView)

[`UISearchBar`](/documentation/UIKit/UISearchBar)

### Inherited By

[`NSCollectionLayoutVisibleItem`](/documentation/UIKit/NSCollectionLayoutVisibleItem)

### Inherits From

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

---

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