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  "identifier" : "/documentation/CoreWLAN/CWEventDelegate",
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  "title" : "CWEventDelegate"
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# CWEventDelegate

The interface a Wi-Fi client object uses to notify its delegate about Wi-Fi events.

```
protocol CWEventDelegate
```

## Overview

An object that adopts the `CWEventDelegate` protocol and that is assigned as the delegate of a [`CWWiFiClient`](/documentation/CoreWLAN/CWWiFiClient) object receives notifications of changes on a Wi-Fi interface. Use the [`startMonitoringEvent(with:)`](/documentation/CoreWLAN/CWWiFiClient/startMonitoringEvent(with:)) method to indicate to the client the event types for which you want to receive notifications. Use the [`stopMonitoringEvent(with:)`](/documentation/CoreWLAN/CWWiFiClient/stopMonitoringEvent(with:)) method to stop receiving a particular notification type, or the [`stopMonitoringAllEvents()`](/documentation/CoreWLAN/CWWiFiClient/stopMonitoringAllEvents()) method to stop receiving all notifications.

## Topics

### Instance Methods

[`bssidDidChangeForWiFiInterface(withName:)`](/documentation/CoreWLAN/CWEventDelegate/bssidDidChangeForWiFiInterface(withName:))

Tells the delegate that the current BSSID has changed.

[`clientConnectionInterrupted()`](/documentation/CoreWLAN/CWEventDelegate/clientConnectionInterrupted())

Tells the delegate that the connection to the Wi-Fi subsystem is temporarily interrupted.

[`clientConnectionInvalidated()`](/documentation/CoreWLAN/CWEventDelegate/clientConnectionInvalidated())

Tells the delegate that the connection to the Wi-Fi subsystem is permanently invalidated.

[`countryCodeDidChangeForWiFiInterface(withName:)`](/documentation/CoreWLAN/CWEventDelegate/countryCodeDidChangeForWiFiInterface(withName:))

Tells the delegate that the currently adopted country code has changed.

[`linkDidChangeForWiFiInterface(withName:)`](/documentation/CoreWLAN/CWEventDelegate/linkDidChangeForWiFiInterface(withName:))

Tells the delegate that the Wi-Fi link state changed.

[`linkQualityDidChangeForWiFiInterface(withName:rssi:transmitRate:)`](/documentation/CoreWLAN/CWEventDelegate/linkQualityDidChangeForWiFiInterface(withName:rssi:transmitRate:))

Tells the delegate that the link quality has changed.

[`modeDidChangeForWiFiInterface(withName:)`](/documentation/CoreWLAN/CWEventDelegate/modeDidChangeForWiFiInterface(withName:))

Tells the delegate that the operating mode has changed.

[`powerStateDidChangeForWiFiInterface(withName:)`](/documentation/CoreWLAN/CWEventDelegate/powerStateDidChangeForWiFiInterface(withName:))

Tells the delegate that the Wi-Fi power state changed.

[`scanCacheUpdatedForWiFiInterface(withName:)`](/documentation/CoreWLAN/CWEventDelegate/scanCacheUpdatedForWiFiInterface(withName:))

Tells the delegate that the Wi-Fi interface’s scan cache has been updated with new results.

[`ssidDidChangeForWiFiInterface(withName:)`](/documentation/CoreWLAN/CWEventDelegate/ssidDidChangeForWiFiInterface(withName:))

Tells the delegate that the current SSID has changed.


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