List a collection of items in a horizontally scrolling view. A scaling factor controls the size of the items relative to the center.

Programming language: Swift
License: MIT License
Tags: Animation     UI     Menu     Swift    
Latest version: v1.0.0

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List a collection of items in a horizontally scrolling view. A scaling factor controls the size of the items relative to the center.

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  • iOS 12.0+
  • Xcode 10.2+
  • Swift 5.0+


Just add the CircularCarousel directory to your project.

or use CocoaPods with Podfile:

pod 'CircularCarousel'

or just drag and drop the CircularCarousel directory to your project


1 Create a custom view that will be used as a carousel item. In this tutorial we will just use a blank UIView.

2 Create a view controller or container view that handles datasource and delegate responses for the contained Carousel.

final class ContainerView : UITableViewCell, CircularCarouselDataSource, CircularCarouselDelegate {


2.1 Add a reference to the carousel control and the selection of a delegate and datasource to your Carousel control.

private weak var _carousel : CircularCarousel!

@IBOutlet var carousel : CircularCarousel! {
    set {
        _carousel = newValue
        _carousel.delegate = self
        _carousel.dataSource = self

    get {
        return _carousel

3 Implement the DataSource and Delegate functions. Some of the key functions are listed below.

3.1 Datasource

func numberOfItems(inCarousel carousel: CircularCarousel) -> Int {
    return /* Number of carousel items */
func carousel(_: CircularCarousel, viewForItemAt indexPath: IndexPath, reuseView view: UIView?) -> UIView {
    var view = view as? UIVIew

    if view == nil {
        view = UIView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))

    return view
func startingItemIndex(inCarousel carousel: CircularCarousel) -> Int {
    return /* Insert starting item index */

3.2 Delegate

Select how you want the carousel to operate based on the control variables specified below :

func carousel<CGFloat>(_ carousel: CircularCarousel, valueForOption option: CircularCarouselOption, withDefaultValue defaultValue: CGFloat) -> CGFloat {
    switch option {
    case .itemWidth:
        return /* Select item width for carousel */
    /*  Insert one of the following handlers :
    case spacing
    case fadeMin
    case fadeMax
    case fadeRange
    case fadeMinAlpha
    case offsetMultiplier
    case itemWidth
    case scaleMultiplier
    case minScale
    case maxScale
        return defaultValue

Handle the selection of a particular carousel item :

func carousel(_ carousel: CircularCarousel, didSelectItemAtIndex index: Int) {
    /* Handle selection of the selected carousel item */

Handle will begin scrolling :

func carousel(_ carousel: CircularCarousel, willBeginScrollingToIndex index: Int) {


To handle spacing between items depending on their offst from the center :

func carousel(_ carousel: CircularCarousel, spacingForOffset offset: CGFloat) -> CGFloat {        
    return /* Based on the offset from center, adjust the spacing of the item */

That's it, the Carousel is good to go!

📄 License

Carousel is released under the MIT license. See [LICENSE](./LICENSE) for details.

This library is a part of a selection of our best UI open-source projects.

If you use the open-source library in your project, please make sure to credit and backlink to https://www.ramotion.com/

📱 Get the Showroom App for iOS to give it a try

Try this UI component and more like this in our iOS app. Contact us if interested.

*Note that all licence references and agreements mentioned in the CAROUSEL README section above are relevant to that project's source code only.