SwiftUI: Layout & Interfaces

Nov 18 2021 · Swift 5.5, iOS 15, Xcode 13

Part 1: Dynamic View Layout

05. Grids

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Previous episode: 04. Challenge: Nested Scrolling Stacks Next episode: 06. PinnedScrollableViews

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By this point, you’ve gotten a good handle on all of SwiftUI’s Stacks. Lazy, or not Lazy… …Horizontal, or Vertical. And you know how to nest both dimensions of Stacks within each other.

LazyVGrid {

LazyVGrid(columns: <#[GridItem]#>) {

    LazyVGrid(
      columns: [
        .init()
      ]
    ) {

      columns: [
        .init(),
        .init(),
        .init()
      ]

      columns: [
        .init(.fixed(50)),
        .init(),

.init(.fixed(50)),
.init(.flexible()),
.init()

        .init(.fixed(50)),
        .init(.flexible(minimum: 200)),
        .init()

.init(.adaptive(minimum: <#T##CGFloat#>, maximum: <#T##CGFloat#>))

.init(.adaptive(minimum: 100))

        .init(.flexible(maximum: 100)),
        .init(.adaptive(minimum: 30))

//        .init(.fixed(50)),
//        .init(.flexible(maximum: 100)),
        .init(.adaptive(minimum: 30))

        .init(.fixed(50), spacing: 30),
        .init(.flexible(maximum: 100), spacing: 30),
        .init(.adaptive(minimum: 30), spacing: 30)

    LazyHGrid(

    LazyHGrid(
      rows: [

      .frame(height: 125)

.frame(width: 125)

      rows: [
        .init(.fixed(300), spacing: 30),
        .init(.flexible(maximum: 200), spacing: 30),
        .init(.adaptive(minimum: 50), spacing: 30)
      ]

  var body: some View {
    ScrollView(.horizontal) {
      LazyHGrid(
        rows: [
          .init(.fixed(300), spacing: 30),
          .init(.flexible(maximum: 200), spacing: 30),
          .init(.adaptive(minimum: 50), spacing: 30)
        ]
      ) {
        ForEach(
          Genre.list.randomElement()!.subgenres.shuffled().prefix(20),
          content: \.view
        )
      }
      .padding(.horizontal)
    }
  }

Genre.list.randomElement()!.subgenres,