Swift 获取 SSID 方法

func currentSSID()-> String {

        guard let wifiInterfaces = CNCopySupportedInterfaces() else { return nil }

        let interfaceArr = CFBridgingRetain(wifiInterfaces) as! Array

        if interfaceArr.count > 0 {

            let interfaceName = interfaceArr[0] as CFString

            let ussafeInterfaceData = CNCopyCurrentNetworkInfo(interfaceName)

            if (ussafeInterfaceData != nil) {

                let interfaceData = ussafeInterfaceData as! Dictionary<String, Any>

                return interfaceData["SSID"] as? String

            }

        }

        return nil 

    };