UIAbility
UIAbility is a type of application component that provides the UI for user interactions. The UIAbility module provides lifecycle callbacks such as component creation, destruction, and foreground/background switching.
UIAbility is the basic unit of scheduling in OpenHarmony and provides a window for applications to draw the UI. An application can contain one or more UIAbility components. For example, for a payment application, you can use separate UIAbility components to carry the entry and payment functionalities.
Each UIAbility component instance is displayed as a mission in the system application Recents.
You can develop a single UIAbility or multiple UIAbilities for your application based on service requirements.
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If you want your application to be displayed as one mission in Recents, use one UIAbility and multiple pages.
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If you want your application to be displayed as multiple missions in Recents or multiple windows to be opened simultaneously, use multiple UIAbilities.
Portions of this documentation are adapted from OpenHarmony Documentation by OpenHarmony community, licensed under CC BY 4.0.