WaterfallGrid

A waterfall grid layout view for SwiftUI.

Features

Irregular grid of content.
Columns number different per device orientation.
Spacing and grid padding customizable.
Horizontal or vertical scroll direction.
Items update can be animated.

Usage

Initialization

You can create a grid that displays the elements of collection by passing your collection of data and a closure that provides a view for each element in the collection. The grid transforms each element in the collection into a child view by using the supplied closure.

WaterfallGrid works with identifiable data (like SwiftUI.List). You can make your data identifiable in one of two ways: by passing along with your data a key path to a property that uniquely identifies each element, or by making your data type conform to the Identifiable protocol.

Example 1

A grid of views of type Image from a collection of data identified by a key path.

WaterfallGrid((0..<10), id: \.self) { index in
  Image("image\(index)")
    .resizable()
    .aspectRatio(contentMode: .fit)
}

Example 2

A grid of views of type RectangleView from a collection of Identifiable data.

WaterfallGrid(rectangles) { rectangle in
  RectangleView(rectangle: rectangle)
}

or, for simple cases like this, just:

WaterfallGrid(rectangles, content: RectangleView.init)

Grid Style

To customise the appearance of the grid call the gridStyle function and pass the parameters you want to customise.

Columns

WaterfallGrid(cards) { card in
  CardView(card: card)
}
.gridStyle(columns: 2)

WaterfallGrid(cards, content: CardView.init)
.gridStyle(
  columnsInPortrait: 2,
  columnsInLandscape: 3
)

Spacing and Padding

WaterfallGrid(rectangles, content: RectangleView.init)
.gridStyle(spacing: 8)
.padding(EdgeInsets(top: 16, leading: 8, bottom: 16, trailing: 8))

Animation

WaterfallGrid(rectangles, content: RectangleView.init)
.gridStyle(animation: .easeInOut(duration: 0.5))

Scroll Behaviour

Embed in ScrollView & Indicators option

ScrollView(showsIndicators: true) {
  WaterfallGrid(rectangles, content: RectangleView.init)
}

Horizontal Scroll Direction

ScrollView(.horizontal) {
  WaterfallGrid(rectangles, content: RectangleView.init)
  .scrollOptions(direction: .horizontal)
}

A Complete Example

ScrollView(.horizontal, showsIndicators: false) {
  WaterfallGrid(cards) { card in
    CardView(card: card)
  }
  .gridStyle(
    columnsInPortrait: 2,
    columnsInLandscape: 3,
    spacing: 8,
    animation: .easeInOut(duration: 0.5)
  )
  .scrollOptions(direction: .horizontal)
  .padding(EdgeInsets(top: 16, leading: 8, bottom: 16, trailing: 8))
}

Sample App

Explore the WaterfallGridSample app for some more detailed and interactive examples.

Installation

Swift Package Manager

App dependency

select File > Swift Packages > Add Package Dependency and enter the repository URL (Adding Package Dependencies to Your App)

Package dependency

Add it as a dependency within your Package.swift manifest:

dependencies: [
  .package(url: "https://github.com/paololeonardi/WaterfallGrid.git", from: "1.1.0")
]

CocoaPods

You can install WaterfallGrid via CocoaPods by adding the following line to your Podfile:

pod 'WaterfallGrid', '~> 1.1.0'

Run the pod install command to download the library and integrate it into your Xcode project.

Migration Guides

WaterfallGrid 1.0.0 Migration Guide

Versioning

For the versions available, see the releases on this repository.

Contributing

Contributions are more than welcome. Please create a GitHub issue before submitting a pull request to plan and discuss implementation.

Author

Paolo Leonardi (@paololeonardi)

Credits

WaterfallGrid was inspired by the following projects:

QGrid - https://github.com/Q-Mobile/QGrid
Grid - https://github.com/SwiftUIExtensions/Grid
The SwiftUI Lab - https://swiftui-lab.com

License

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