spacenation/swiftui-grid

:rocket: SwiftUI Grid layout with custom styles

SwiftUI Grid

SwiftUI Grid view layout with custom styles.

Features

• ZStack based layout
• Vertical and horizontal scrolling
• Supports all apple platforms
• Custom styles (ModularGridStyle, StaggeredGridStyle)
• SwiftUI code patterns (StyleStructs, EnvironmentValues, ViewBuilder)
• Active development for production apps

Open GridDemo.xcodeproj for more examples for iOS, macOS, watchOS and tvOS

Styles

ModularGridStyle (Default)

ScrollView {
    Grid(colors) {
        Rectangle()
            .foregroundColor($0)
    }
}
.gridStyle(
    ModularGridStyle(columns: .min(100), rows: .fixed(100))
)

StaggeredGridStyle

ScrollView {
    Grid(1...69, id: \.self) { index in
        Image("\(index)")
            .resizable()
            .scaledToFit()
    }
}
.gridStyle(
    StaggeredGridStyle(.horizontal, tracks: 8, spacing: 4)
)

Tracks

Tracks setting allows you to customize grid behaviour to your specific use-case. Both Modular and Staggered grid use tracks value to calculate layout. In Modular layout both columns and rows are tracks.

public enum Tracks: Hashable {
    case count(Int)
    case fixed(CGFloat)
    case min(CGFloat)
}

Count

Grid is split into equal fractions of size provided by a parent view.

ModularGridStyle(columns: 3, rows: 3)
StaggeredGridStyle(tracks: 8)

Fixed

Item size is fixed to a specific width or height.

ModularGridStyle(columns: .fixed(100), rows: .fixed(100))
StaggeredGridStyle(tracks: .fixed(100))

Min

Autolayout respecting a min item width or height.

ModularGridStyle(columns: .min(100), rows: .fixed(100))
StaggeredGridStyle(tracks: .min(100))

Preferences

Get item size and position with preferences

struct CardsView: View {
    @State var selection: Int = 0
    
    var body: some View {
        ScrollView {
            Grid(0..<100) { number in
                Card(title: "\(number)")
                    .onTapGesture {
                        self.selection = number
                    }
            }
            .padding()
            .overlayPreferenceValue(GridItemBoundsPreferencesKey.self) { preferences in
                RoundedRectangle(cornerRadius: 16)
                    .strokeBorder(lineWidth: 4)
                    .foregroundColor(.white)
                    .frame(
                        width: preferences[self.selection].width,
                        height: preferences[self.selection].height
                    )
                    .position(
                        x: preferences[self.selection].midX,
                        y: preferences[self.selection].midY
                    )
                    .animation(.linear)
            }
        }
    }
}

SDKs

• iOS 13.1+
• Mac Catalyst 13.1+
• macOS 10.15+
• watchOS 6+
• Xcode 11.0+

Roadmap

• Items span
• 'CSS Grid'-like features

Code Contributions

Feel free to contribute via fork/pull request to master branch. If you want to request a feature or report a bug please start a new issue.

Coffee Contributions

If you find this project useful please consider becoming my GitHub sponsor.