LazyHStack

The LazyHStack view is a layout container where items are arranged in a horizontal line (left-to-right), like in a standard HStack view, but it will only create them when needed. This is useful for creating long lists and can allow an app to run smoother and faster.

Syntax

var body: some View {
    LazyHStack {
        Subviews here
    }
}

The LazyHStack view rests within the body of a View.

Example

In this example, a ScrollView contains a LazyHStack that consists of columns stacked next to each other in the view:

var body: some View {
    ScrollView(.horizontal) {
        LazyHStack {
            ForEach(1...100, id: \.self) {
                Text("Column \($0)")
            }
        }
    }
}

• ScrollView() displays the content within the scrollable region and adjusts what portion of the content is visible. Here, the axis is set to .horizontal, which allows for horizontal scrolling.
• ForEach is a method that takes two parameters, a ClosedRange<Int> and an id so SwiftUI can identify each of the items uniquely in order to update the values when changed. In this case, 100 Text subviews are created.
• $0 is a short hand syntax used to reference the first argument in a closure.

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