DISPATCH_QUEUE_PRIORITY_LOW
Tasks run at a low priority, which is equivalent to the utility quality-of-service level.
Declaration
var DISPATCH_QUEUE_PRIORITY_LOW: Int32 { get }Discussion
Use quality-of-service constants instead. This constant maps to the QOS_CLASS_UTILITY class.
Items dispatched to the queue run at low priority; the queue is scheduled for execution after all default priority and high priority queues have been scheduled.