init(_:)

Declaration

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

Parameters

• keyPath:

  A key path to a specific resulting value.

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.