Kronos is an NTP client library written in Swift. It supports sub-seconds precision and provides a stable monotonic clock that won't be affected by changes in the clock.
This is an
example app that displays the monotonic Clock.now on the left and the
system clock (initially out of date) on the right.
Calling Clock.sync will fire a bunch of NTP requests to up to 5 of the
servers on the given NTP pool (default is time.apple.com). As soon as
we get the first response, the given closure is called but the Clock
will keep trying to get a more accurate response.
Clock.sync { date, offset in
// This is the first sync (note that this is the fastest but not the
// most accurate run
print(date)
}Clock.now is a monotonic NSDate that won't be affected by clock
changes.
NSTimer.scheduledTimerWithTimeInterval(1.0, target: self,
selector: #selector(Example.tick),
userInfo: nil, repeats: true)
@objc func tick() {
print(Clock.now) // Note that this clock will get more accurate as
// more NTP servers respond.
}Add Kronos to your Podfile:
pod 'Kronos'Add Kronos to your Pacakge.swift:
.package(name: "Kronos", url: "https://github.com/MobileNativeFoundation/Kronos.git", .upToNextMajor(from: "TAG")),Add Kronos to your WORKSPACE:
http_archive(
name = "Kronos",
sha256 = "",
strip_prefix = "Kronos-TAG/",
url = "https://github.com/MobileNativeFoundation/Kronos/archive/TAG.tar.gz",
)Then depend on @Kronos//:Kronos
Check out Kronos for Android