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

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 ""     }   }