I find one solution to this issue if you using Alamofire.
First import Alamofire in your common class otherwise you can create a separate class for check internet connection.
> import Alamofire
class Connectivity { class func isConnectedToInternet() ->Bool { return NetworkReachabilityManager()!.isReachable } }
Call below method before you API call
if !Connectivity.isConnectedToInternet() { ServiceHandler.ShowAlert(message: "Check your internet connectivity.", title: "Error", parentView: self) //This is my comman method for display alert. return }

I find one solution to this issue if you using Alamofire.
First import Alamofire in your common class otherwise you can create a separate class for check internet connection.
> import Alamofire
class Connectivity { class func isConnectedToInternet() ->Bool { return NetworkReachabilityManager()!.isReachable } }
Call below method before you API call
if !Connectivity.isConnectedToInternet() { ServiceHandler.ShowAlert(message: "Check your internet connectivity.", title: "Error", parentView: self) //This is my comman method for display alert. return }