Handling Internet Connection reachability Swift 5. Article link: http://www.popcornomnom.com/handling-internet-connection-reachability-on-ios-swift-5/

ReachabilityHandler.swift

class ReachabilityHandler: ReachabilityObserverDelegate {
  
  //MARK: Lifecycle
  
  required init() {
    try? addReachabilityObserver()
  }
  
  deinit {
    removeReachabilityObserver()
  }
  
  //MARK: Reachability
    
  func reachabilityChanged(_ isReachable: Bool) {
    if !isReachable {
        print("No internet connection")
    }
}