CWEventType.powerDidChange Posts when the power state of any Wi-Fi interface changes. Declarationcase powerDidChange See AlsoConstantsCWEventType.noneCWEventType.ssidDidChangeCWEventType.bssidDidChangeCWEventType.countryCodeDidChangeCWEventType.linkDidChangeCWEventType.linkQualityDidChangeCWEventType.modeDidChangeCWEventType.scanCacheUpdatedCWEventType.unknown