# init(_:systemImage:sources:isOn:) Creates a toggle representing a collection of values that generates its label from a localized string key and system image. ``` @export(implementation) nonisolated init(_ titleKey: LocalizedStringKey, systemImage: String, sources: C, isOn: KeyPath>) where C : RandomAccessCollection ``` ## Parameters `titleKey` The key for the toggle’s localized title, that describes the purpose of the toggle. `systemImage` The name of the image resource to lookup. `sources` A collection of values used as the source for rendering the Toggle’s state. `isOn` The key path of the values that determines whether the toggle is on, mixed or off. ## Discussion This initializer creates a [`Text`](/documentation/SwiftUI/Text) view on your behalf, and treats the localized key similar to [`init(_:tableName:bundle:comment:)`](/documentation/SwiftUI/Text/init(_:tableName:bundle:comment:)). See `Text` for more information about localizing strings. The following example creates a single toggle that represents the state of multiple alarms: ``` struct Alarm: Hashable, Identifiable { var id = UUID() var isOn = false var name = "" } @State private var alarms = [ Alarm(isOn: true, name: "Morning"), Alarm(isOn: false, name: "Evening") ] Toggle("Enable all alarms", sources: $alarms, isOn: \.isOn) ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)