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    <p>Using Apple's Reachability code, I created a function that'll check this correctly without you having to include any classes.</p> <p>Include the SystemConfiguration.framework in your project.</p> <p>Make some imports:</p> <pre><code>#import &lt;sys/socket.h&gt; #import &lt;netinet/in.h&gt; #import &lt;SystemConfiguration/SystemConfiguration.h&gt; </code></pre> <p>Now just call this function:</p> <pre><code>/* Connectivity testing code pulled from Apple's Reachability Example: https://developer.apple.com/library/content/samplecode/Reachability */ +(BOOL)hasConnectivity { struct sockaddr_in zeroAddress; bzero(&amp;zeroAddress, sizeof(zeroAddress)); zeroAddress.sin_len = sizeof(zeroAddress); zeroAddress.sin_family = AF_INET; SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, (const struct sockaddr*)&amp;zeroAddress); if (reachability != NULL) { //NetworkStatus retVal = NotReachable; SCNetworkReachabilityFlags flags; if (SCNetworkReachabilityGetFlags(reachability, &amp;flags)) { if ((flags &amp; kSCNetworkReachabilityFlagsReachable) == 0) { // If target host is not reachable return NO; } if ((flags &amp; kSCNetworkReachabilityFlagsConnectionRequired) == 0) { // If target host is reachable and no connection is required // then we'll assume (for now) that your on Wi-Fi return YES; } if ((((flags &amp; kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) || (flags &amp; kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0)) { // ... and the connection is on-demand (or on-traffic) if the // calling application is using the CFSocketStream or higher APIs. if ((flags &amp; kSCNetworkReachabilityFlagsInterventionRequired) == 0) { // ... and no [user] intervention is needed return YES; } } if ((flags &amp; kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN) { // ... but WWAN connections are OK if the calling application // is using the CFNetwork (CFSocketStream?) APIs. return YES; } } } return NO; } </code></pre> <p>And it's <a href="https://en.wikipedia.org/wiki/IOS_5" rel="noreferrer">iOS&nbsp;5</a> tested for you.</p>
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    1. POHow to check for an active Internet connection on iOS or macOS?
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    1. USAndrew Zimmer
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    1. COCan u describe this code? How does this check works?
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      1. USValerii Pavlov
    2. COWorks well on iOS3.0 too, thx
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      1. USRocketMan
    3. CO@JezenThomas This doesn't perform the internet check asynchronously, which is why it is "much slimmer"... You should always be doing this asynchronously by subscribing to notifications so that you don't hang up the app on this process.
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