Enumerationswift 6.1.2Dispatch
QoSClass
enum QoSClassenum QoSClassimport Dispatchstruct DispatchQoSqos_class_t
case backgroundcase `default`case unspecifiedcase userInitiatedcase userInteractivecase utilityinit(qosClass: DispatchQoS.QoSClass, relativePriority: Int) static let background: DispatchQoSstatic let `default`: DispatchQoSstatic let unspecified: DispatchQoSstatic let userInitiated: DispatchQoSstatic let userInteractive: DispatchQoSstatic let utility: DispatchQoSlet qosClass: DispatchQoS.QoSClasslet relativePriority: Intprotocol EquatableA type that can be compared for value equality.
protocol Hashable : EquatableA type that can be hashed into a Hasher to produce an integer hash value.
static func != (lhs: Self, rhs: Self) -> Bool Returns a Boolean value indicating whether two values are not equal.