---
title: "quickSwitchManager(_:didChangeTo:)"
framework: coretelephony
role: symbol
role_heading: Instance Method
path: "coretelephony/ctquickswitchmanager/delegate-swift.protocol/quickswitchmanager(_:didchangeto:)"
---

# quickSwitchManager(_:didChangeTo:)

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

## Declaration

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

## Discussion

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

## See Also

### Related Documentation

- [CTQuickSwitchState](coretelephony/ctquickswitchstate.md)