How to determine the iOS connection type (Edge, 3G, 4G, Wifi)?

Question

How is it possible to determine the iOS connection type?

I want to know if there is Edge, 3G, 4G oder Wifi available at this moment on my device.

This information I need to load different data with a different size.

So, I don't want to load an image of 4 MB with a connection type "Edge".

Answer 1

For swift we can use following function:

func getNetworkType()->String {
    do{
        let reachability:Reachability = try Reachability.reachabilityForInternetConnection()
        do{
            try reachability.startNotifier()
            let status = reachability.currentReachabilityStatus
            if(status == .NotReachable){
                return ""
            }else if (status == .ReachableViaWiFi){
                return "Wifi"
            }else if (status == .ReachableViaWWAN){
                let networkInfo = CTTelephonyNetworkInfo()
                let carrierType = networkInfo.currentRadioAccessTechnology
                switch carrierType{
                case CTRadioAccessTechnologyGPRS?,CTRadioAccessTechnologyEdge?,CTRadioAccessTechnologyCDMA1x?: return "2G"
                case CTRadioAccessTechnologyWCDMA?,CTRadioAccessTechnologyHSDPA?,CTRadioAccessTechnologyHSUPA?,CTRadioAccessTechnologyCDMAEVDORev0?,CTRadioAccessTechnologyCDMAEVDORevA?,CTRadioAccessTechnologyCDMAEVDORevB?,CTRadioAccessTechnologyeHRPD?: return "3G"
                case CTRadioAccessTechnologyLTE?: return "4G"
                default: return ""
                }


            }else{
                return ""
            }
        }catch{
            return ""
        }

    }catch{
        return ""
    }


}