---
title: "init(_:)"
framework: swiftui
role: symbol
role_heading: Initializer
path: "swiftui/environment/init(_:)"
---

# init(_:)

Creates an environment property to read the specified key path.

## Declaration

```swift
init(_ keyPath: KeyPath<EnvironmentValues, Value>)
```

## Parameters

- `keyPath`: A key path to a specific resulting value.

## Discussion

Discussion Don’t call this initializer directly. Instead, declare a property with the Environment property wrapper, and provide the key path of the environment value that the property should reflect: struct MyView: View {     @Environment(\.colorScheme) var colorScheme: ColorScheme

// ... } SwiftUI automatically updates any parts of MyView that depend on the property when the associated environment value changes. You can’t modify the environment value using a property like this. Instead, use the environment(_:_:) view modifier on a view to set a value for a view hierarchy.