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# AnyLayout

A type-erased instance of the layout protocol.

```
@frozen struct AnyLayout
```

## Overview

Use an `AnyLayout` instance to enable dynamically changing the
type of a layout container without destroying the state of the subviews.
For example, you can create a layout that changes between horizontal and
vertical layouts based on the current Dynamic Type setting:

```
struct DynamicLayoutExample: View {
    @Environment(\.dynamicTypeSize) var dynamicTypeSize

    var body: some View {
        let layout = dynamicTypeSize <= .medium ?
            AnyLayout(HStackLayout()) : AnyLayout(VStackLayout())

        layout {
            Text("First label")
            Text("Second label")
        }
    }
}
```

The types that you use with `AnyLayout` must conform to the [`Layout`](/documentation/SwiftUI/Layout)
protocol. The above example chooses between the [`HStackLayout`](/documentation/SwiftUI/HStackLayout) and
[`VStackLayout`](/documentation/SwiftUI/VStackLayout) types, which are versions of the built-in [`HStack`](/documentation/SwiftUI/HStack)
and [`VStack`](/documentation/SwiftUI/VStack) containers that conform to the protocol. You can also
use custom layout types that you define.

## Topics

### Creating the layout

[`init(_:)`](/documentation/SwiftUI/AnyLayout/init(_:))

Creates a type-erased value that wraps the specified layout.


---

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