<!--
{
  "availability" : [
    "iOS: 27.0.0 -",
    "iPadOS: 27.0.0 -",
    "macCatalyst: 27.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreTelephony",
  "identifier" : "/documentation/CoreTelephony/CTQuickSwitchManager/Delegate-swift.protocol/quickSwitchManager(_:didChangeTo:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Core Telephony"
    ],
    "preciseIdentifier" : "c:objc(pl)CTQuickSwitchManagerDelegate(im)quickSwitchManager:didChangeToState:"
  },
  "title" : "quickSwitchManager(_:didChangeTo:)"
}
-->

# quickSwitchManager(_:didChangeTo:)

Indicates there’s been a change in device’s quick switch state.

```
optional func quickSwitchManager(_ quickSwitchManager: CTQuickSwitchManager, didChangeTo state: CTQuickSwitchState)
```

## Discussion

Implement this method to receive notification when the device’s quick switch state changes.

## See Also

[`enum CTQuickSwitchState`](/documentation/CoreTelephony/CTQuickSwitchState)

Values that describe a device’s quick switch status.


---

Copyright &copy; 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)