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How to Check if Your iOS or MacOS App is Connected to the Internet


Is your app connected to the internet? You can use this standalone class to check! There are no dependencies so you can copy/paste it into your project without needing to install another framework.

With this class it's as simple as running Reachability.isConnectedToNetwork()

import Cocoa
import SystemConfiguration
// Usage
// if Reachability.isConnectedToNetwork() {
//   print("We're online!")
// }
public class Reachability {
    class func isConnectedToNetwork() -> Bool {
        var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
        zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)
        guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
                SCNetworkReachabilityCreateWithAddress(nil, $0)
        }) else {
            return false
        var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
        if SCNetworkReachabilityGetFlags(defaultRouteReachability as! SCNetworkReachability, &flags) == false {
            return false
        let isReachable = flags == .reachable
        let needsConnection = flags == .connectionRequired
        return isReachable && !needsConnection

And here is a link to a gist Reachability.swift

Tagged w/ #ios #swift #macos #cocoa #networking #reachability #isconnectedtonetwork #online #xcode #apple

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