SwiftUI: How To Toggle a Switch Programmatically

November 10, 2025·1 min read·by dockui

A programmatic toggle in SwiftUI means changing the Toggle value from code without the user tapping it.

Shortest Working Example

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This works because Toggle is bound to a @State Bool.
Changing that Bool updates the UI instantly.

Updating The Toggle From Another View

If the toggle is in another view, you pass a binding.

Code Snippet

Animate The Toggle Change

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SwiftUI will smoothly animate the change.

Common Mistakes

using let instead of @State
creating a new Bool each time instead of binding
not passing Binding when the toggle is in a child view

FAQ

Q: Can I programmatically toggle without a button?
A: Yes. You can flip the Bool anywhere in code: isOn.toggle()

Q: Does this work in macOS SwiftUI?
A: Yes. Same exact pattern.

Summary Code (Copy/Paste)

Code Snippet

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