Animate your views and other content to create a more engaging experience for users.


View-Based Animations


An animation of an app's views, limited to changes in frame location and size, and to fade-in and fade-out effects.


A set of methods that defines a way to add animation to an existing class with a minimum of API impact.


An animation context, which contains information about environment and state.


The animation progress, as a floating-point number between 0.0 and 1.0.


The type for standard system animation effects, which include both display and sound.



A set of methods that let you define animations to play when transitioning between two view controllers.

Custom Animations


An object that manages the timing and progress of animations in the user interface.


A set of optional methods implemented by delegates of NSAnimation objects.

System Animations


Runs a system animation effect.

See Also

User Interface

Supporting Continuity Camera in Your Mac App

Incorporate scanned documents and pictures taken with a user's iPhone, iPad, or iPod touch into your Mac app using Continuity Camera.

Views and Controls

Present your content onscreen and define the interactions allowed with that content.

View Management

Manage your user interface, including the size and position of views in a window.

View Layout

Position and size views using a stack view or Auto Layout constraints.

Appearance Customization

Add Dark Mode support to your app, and use appearance proxies to modify your UI.

Windows, Panels, and Screens

Organize your view hierarchies and facilitate their display onscreen.

Sound, Speech, and Haptics

Play sounds and haptic feedback, and incorporate speech recognition and synthesis into your interface.