Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline
Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline
i'm hiting an API in postman there i'm getting response fine. But when i hit same API in my iOS App its shows me nil response and result is error. I have printed the error,it shows me this, Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline. I have checked my internet connection it is working fine.I have searched different sites the internet connection if fine. But all the time it shows me this error. I'm confuse that why it is showing me this error. My code to hit api is this, 
Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline.
class WalletDetailService
static let instance = WalletDetailService()
var getWalletDetailModelArray = [WalletDetail]()
var status:Int = 0
func getWalletDetails(param:[String : String],completion:@escaping CompletionHandler)
 let header = [
 "auth": "2dd7cfb3c40b4830b72be2cc90276fd9"
 ]
 print(header)
 let url = URL(string: getWalletDetailsUrl)
 Alamofire.request(url!, method: .post, parameters: param, encoding: JSONEncoding.default, headers: header).responseJSON (response) in
 print("Request: (String(describing: response.request))") // original url request
 print("Response: (String(describing: response.response))") // http url response
 print("Result: (response.result)")// response serialization result
 if response.result.error == nil
 guard let data = response.data else return
 do
 if let json = try JSON(data: data).dictionary
 let result = json["result"]?.dictionary
 let monthlyRental = result!["monthly_rental"]?.intValue
 print(monthlyRental!)
 
 completion(true)
 
 completion(true)
 catch let jsonErr
 print(jsonErr)
 
 else
 completion(false)
 debugPrint(response.result.error as Any)
 
 
}
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