Pulsator

May 22, 2026 · View on GitHub

License X (formerly Twitter)

Pulse animation for iOS and macOS, usable from both UIKit and SwiftUI.

Pulsator demo

Great For:

  • Pulses of Bluetooth, BLE, beacons (iBeacon), etc.
  • Map Annotations

Installation

Swift Package Manager

In Xcode, choose File → Add Package Dependencies… and enter this repository's URL:

CocoaPods (deprecated)

Add into your Podfile.

pod "Pulsator"

Then $ pod install

How to use

SwiftUI

Just 1 line! Add the .pulsator() modifier to any view.

yourView
    .pulsator()

UIKit

Initiate and add to your view's layer, then call start!

let pulsator = Pulsator()
view.layer.addSublayer(pulsator)
pulsator.start()

Customizations

SwiftUI example:

yourView
    .pulsator(
        numPulse: 3,
        radius: 240,
        animationDuration: 5,
        color: pulseColor,
        isPulsating: isPulsating
    )

Number of Pulses

Use numPulse property.

pulsator.numPulse = 3

Radius

Use radius property.

pulsator.radius = 240.0

Color

Just set the backgroundColor property.

pulsator.backgroundColor = UIColor(red: 1, green: 1, blue: 0, alpha: 1).cgColor

Animation Duration

Use following properties

  • animationDuration : duration for each pulse
  • pulseInterval : interval between pulses

Easing

You can set the timingFunction property.

Repeat

Use repeatCount property.

Demo

Try changing the radius, backgroundColor or other properties with the demo apps.

  • SwiftUI: Example/SwiftUI/PulsatorDemo.xcodeproj
  • UIKit: Example/UIKit/PulsatorDemo.xcodeproj

macOS support

Add into your Podfile, then run pod install.

platform :osx, '10.9'

target 'Pulsator' do
  use_frameworks!
  pod "Pulsator"
end

The usage is same as iOS.

let pulsator = Pulsator()
view.layer?.addSublayer(pulsator)
pulsator.start()

Objective-C version

There is an ObjC version, but it's not maintained now.

You can use Pulsator also with Objective-C.

#import "Pulsator-Swift.h"

Author

Shuichi Tsutsumi

iOS freelancer in Japan. Welcome works from abroad!

Support via PayPal