CODEWITHSUNDEEP
swift
GoGode
GoGode

Reputation: 85

Show Alert if no Network Connection

How can you notify the user that there is no network connection with swift 3. I have tried a bunch of solutions and none of them have worked so far. I am not looking for the speed of the network connection

Upvotes: 0

Views: 4664

Answers (1)

Lawliet
Lawliet

Reputation: 3499

There are a lot of resources showing how to check the Internet connection. E.g., from this.

    func isInternetAvailable() -> Bool
    {
        var zeroAddress = sockaddr_in()
        zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)

        let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
                SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
            }
        }

        var flags = SCNetworkReachabilityFlags()
        if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
            return false
        }
        let isReachable = flags.contains(.reachable)
        let needsConnection = flags.contains(.connectionRequired)
        return (isReachable && !needsConnection)
    }

    func showAlert() {
        if !isInternetAvailable() {
            let alert = UIAlertController(title: "Warning", message: "The Internet is not available", preferredStyle: .alert)
            let action = UIAlertAction(title: "Dismiss", style: .default, handler: nil)
            alert.addAction(action)
            present(alert, animated: true, completion: nil)
        }
    }

You need to import:

import Foundation
import SystemConfiguration

Upvotes: 5

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