Dispatch represents a point in time relative to the default clock with nanosecond precision. On Apple platforms, the default clock is based on the Mach absolute time unit.
SDKs
Framework
init(uptimeCreates a time relative to the system clock that ticks since boot.
let rawReturns the underlying dispatch_time_t value.
var uptimeReturns the number of nanoseconds since boot, excluding any time the system spent asleep.
static let distantReturns a time in the distant future.
static func now()Returns the current time.
Base time constants.
struct DispatchDispatch represents an absolute point in time according to the wall clock with microsecond precision. On Apple platforms, the default clock is based on the result of gettimeofday(2).
enum DispatchDispatch represents a number of seconds, millisconds, microseconds, or nanoseconds. You use Dispatch values to specify the interval at which a Dispatch fires or I/O handlers are invoked for a Dispatch channel, as well as to increment and decrement Dispatch values.
enum DispatchDispatch indicates whether a dispatch operation finised before a specified time.
typealias dispatch_time_tA somewhat abstract representation of time.