Read Swifty APIs: NSTimer for more information about this project.

You can easily schedule repeating and non-repeating timers (repeats and delays) using Timer.every and Timer.after:

Timer.every(0.7.seconds) {
    statusItem.blink()
}
Timer.after(1.minute) {
    println("Are you still here?")
}

You can specify time intervals with these intuitive helpers:

100.ms
1.second
2.5.seconds
5.seconds
10.minutes
1.hour
2.days

You can pass method references instead of closures:

Timer.every(30.seconds, align)

If you want to make a timer object without scheduling, use new(after:) and new(every:):

let timer = Timer.new(every: 1.second) {
    println(self.status)
}

(This should be defined as an initializer, but a bug in Foundation prevents this)

Call start() to schedule timers created using new. You can optionally pass the run loop and run loop modes:

timer.start()
timer.start(modes: .defaultRunLoopMode, .eventTrackingRunLoopMode)

If you want to invalidate a repeating timer on some condition, you can take a Timer argument in the closure you pass in:

Timer.every(5.seconds) { (timer: Timer) in
    // do something
    
    if finished {
        timer.invalidate()
    }
}

Note: If you're running Swift 2, use SwiftyTimer v1.4.1

If you're using CocoaPods, just add this line to your Podfile:

pod 'SwiftyTimer'

Install by running this command in your terminal:

pod install

Then import the library in all files where you use it:

import SwiftyTimer

Just add to your Cartfile:

github "radex/SwiftyTimer"

Simply copy Sources/SwiftyTimer.swift to your Xcode project.

If you like SwiftyTimer, check out SwiftyUserDefaults, which applies the same swifty approach to NSUserDefaults.

You might also be interested in my blog posts which explain the design process behind those libraries:

• Swifty APIs: NSTimer
• Swifty APIs: NSUserDefaults
• Statically-typed NSUserDefaults
• Swifty methods

If you have comments, complaints or ideas for improvements, feel free to open an issue or a pull request.

Radek Pietruszewski

• github.com/radex
• twitter.com/radexp
• radex.io
• this.is@radex.io

SwiftyTimer is available under the MIT license. See the LICENSE file for more info.