Type Property


The quality-of-service class for tasks that the user does not track actively.


static let utility: DispatchQoS


Utility tasks have a lower priority than default, user-initiated, and user-interactive tasks, but a higher priority than background tasks. Assign this quality-of-service class to tasks that do not prevent the user from continuing to use your app. For example, you might assign this class to long-running tasks whose progress the user does not follow actively.

See Also

Getting the Predefined QoS Objects

static let userInteractive: DispatchQoS

The quality-of-service class for user-interactive tasks, such as animations, event handling, or updating your app's user interface.

static let userInitiated: DispatchQoS

The quality-of-service class for tasks that prevent the user from actively using your app.

static let `default`: DispatchQoS

The default quality-of-service class.

static let background: DispatchQoS

The quality-of-service class for maintenance or cleanup tasks that you create.

static let unspecified: DispatchQoS

The absence of a quality-of-service class.

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