UIAccessibilityAction

A set of methods that accessibility elements can use to support specific actions.

Overview 概要

The UIAccessibilityAction informal protocol provides a way for accessibility elements to support specific actions, such as selecting values in a range or scrolling through information on the screen. For example, to respond to a scrolling gesture, you implement the accessibilityScroll(_:) method and post pageScrolled with the new page status (such as “Page 3 of 9”). Or, to make an element such as a slider or picker view accessible, you first need to characterize it by including the adjustable trait. Then, you must implement the accessibilityIncrement() and accessibilityDecrement() methods. When you do this, assistive technology users can adjust the element using gestures specific to the assistive technology.

Topics 話題

Performing an Action

func accessibilityActivate() -> Bool
Tells the element to activate itself and report the success or failure of the operation.
func accessibilityIncrement()
Tells the accessibility element to increment the value of its content.
func accessibilityDecrement()
Tells the accessibility element to decrement the value of its content.
func accessibilityScroll(UIAccessibilityScrollDirection) -> Bool
Scrolls screen content in an application-specific way and returns the success or failure of the action.
func accessibilityPerformEscape() -> Bool
Dismisses a modal view and returns the success or failure of the action.
func accessibilityPerformMagicTap() -> Bool
Performs a salient action.

Accessing Custom Actions

var accessibilityCustomActions: [UIAccessibilityCustomAction]?
An array of custom actions to display along with the built-in actions.

Constants 定数

enum UIAccessibilityScrollDirection
The direction of a scrolling action.

See Also 参照

Actions

class UIAccessibilityCustomAction
A custom action to perform on an accessible object.
typealias UIAccessibilityCustomAction.Handler
A closure type that defines a handler to perform for an action.
Delivering an Exceptional Accessibility Experience
Make improvements to your app’s interaction model to support assistive technologies such as VoiceOver.

Related Documentation 関連文書

Accessibility Programming Guide for iOS