We created and shipped all 50 of these animations in 48 hours. We drew on inspirations from Dribbble, most designs were created in Sketch or Figma, and some were rolled from scratch in Flow. All code was exported using the Custom iOS Activity Indicator option in Flow.

Want to know how we did this so quickly? Check out our article: Animate and Ship 50 iOS Spinners in 48 hours

Each class has its own unique initializer. For example:

GriddyActivityIndicatorView(frame: frame)

You can also use our convience class, like so:

ActivityIndicators.create(.griddy)

We offer a common, basic subclass of UIActivityIndicatorView.

ActivityIndicatorView: UIActivityIndicatorView {
  ...
}

This basic handles the construction of the activity view, provides the space for common styling additions, and syncs playback with native activity indicator methods.

Each indicator is a subclass of ActivityIndicatorView.

GriddyActivityIndicatorView: ActivityIndicatorView {
  ...
}

Animations are written in Swift. They require a few lightweight classes that can be found in FlowCommoniOS.

Our animations take full advantage of native Core Animation, most prominently CAKeyFrameAnimation.

Here is a sample of our animation code:

let strokeEndAnimation: CAKeyframeAnimation = {
    let keyframeAnimation = CAKeyframeAnimation()
    keyframeAnimation.keyPath = "strokeEnd"
    keyframeAnimation.values = [0.16, 0.99]
    keyframeAnimation.keyTimes = [0, 1] 
    keyframeAnimation.timingFunctions = [.easeInEaseOut]
    keyframeAnimation.duration = duration
    return keyframeAnimation
}()

When we ship a cocoapod for this project, we'll update the instructions here.

For now, please download and install manually.

1. Download the project.
2. Install FlowCommon into your project (copy the files in this repo, or install via FlowCommoniOS).
3. Copy ActivityIndicatorView.flow
4. For each indicator your want to use, copy three files into your project:

<Animation>ActivityIndicatorView.swift
<Animation>Timeline.swift
<Animation>View.swift

For example, if you wanted to use the Griddy spinner, you would copy:

GriddyActivityIndicatorView.swift
GriddyTimeline.swift
GriddyView.swift

We love Dribbble and a lot of the animations in this project were originally inspired by other people's great work, which we riffed on and added our own flair and rebounded with links to the original post and designer. Each indicator is posted to Flow's Official Dribbble Account, and in the writeup for each shot we've referenced the original, and the maker.

Over the next 25 days we're posting all 50 animations / indicators and will add a link below as the shots go live.

Below is the list of all 50, and the names are identical to the enum cases in the project.