The quality-of-service class for tasks that prevent the user from actively using your app.
- iOS 8.0+
- macOS 10.10+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
- Xcode 6.0.1+
User-initiated tasks are second only to user-interactive tasks in their priority on the system. Assign this class to tasks that provide immediate results for something the user is doing, or that would prevent the user from using your app. For example, you might use this quality-of-service class to load the content of an email that you want to display to the user.
The quality-of-service class for user-interactive tasks, such as animations, event handling, or updating your app's user interface.
The quality-of-service class for tasks that the user does not track actively.
The quality-of-service class for maintenance or cleanup tasks that you create.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.Learn more about using Apple's beta software