ScrollKit

About ScrollKit

ScrollKit is a SwiftUI SDK that adds powerful scroll features, like offset tracking and a header view that stretches & transforms as you pull down, and sticks to the top when you scroll.

ScrollKit works on all major Apple platforms and is designed to be easy to use. It current doesn’t use the new ScrollView APIs for OS backwards compatibility reasons, but will eventually do so.

Installation

ScrollKit can be installed with the Swift Package Manager:

https://github.com/danielsaidi/ScrollKit.git

Getting started

ScrollKit has a ScrollViewWithOffsetTracking view that can detect scrolling:

ScrollViewWithOffsetTracking { offset in
    print(offset)
} content: {
    // Add your scroll content here, e.g. a `LazyVStack`
}

ScrollKit also has a ScrollViewWithStickyHeader that makes it easy to set up a stretchy, sticky header:

struct MyView: View {

    @State
    private var offset = CGPoint.zero
    
    @State
    private var visibleRatio = CGFloat.zero
    
    func handleOffset(_ scrollOffset: CGPoint, visibleHeaderRatio: CGFloat) {
        self.offset = scrollOffset
        self.visibleRatio = visibleHeaderRatio
    }
    
    func header() -> some View {
        ZStack(alignment: .bottomLeading) {
            Color.blue
            Color.yellow.opacity(visibleRatio)  // Fades in
        }
    }

    var body: some View {
        ScrollViewWithStickyHeader(
            header: header,
            headerHeight: 250,
            headerMinHeight: 150,
            onScroll: handleOffset
        ) {
            // Add your scroll content here, e.g. a `LazyVStack`
        }
    }
}

For more information, please see the getting started guide.

Documentation

The online documentation has more information, articles, code examples, etc.

Demo Application

The demo app lets you explore the library. To try it out, just open and run the Demo project.

Support my work

You can sponsor me on GitHub Sponsors or reach out for paid support, to help support my open-source projects.

Your support makes it possible for me to put more work into these projects and make them the best they can be.

Contact

Feel free to reach out if you have questions or want to contribute in any way:

• Website: danielsaidi.com
• Mastodon: @[email protected]
• Twitter: @danielsaidi
• E-mail: [email protected]

License

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