iPhone reachability checking

From your screen shot, it seems like you do not have Reachability added to your project. You must download Reachability from Apple:

https://developer.apple.com/library/content/samplecode/Reachability/Introduction/Intro.html

And add both .h and .m files to your project.

Update: You noted you have Reachability. But looking at the most recent version, I can see why you have the errors you listed - they changed the API and you are probably using sample code you found somewhere else. Try:

in .h file:

//import Reachability class#import "Reachability.h"// declare Reachability, you no longer have a singleton but manage instancesReachability* reachability;

in .m file:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNetworkChange:) name:kReachabilityChangedNotification object:nil];reachability = [Reachability reachabilityForInternetConnection];[reachability startNotifier];NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus]; if(remoteHostStatus == NotReachable) {NSLog(@"no");}else if (remoteHostStatus == ReachableViaWiFi) {NSLog(@"wifi"); }else if (remoteHostStatus == ReachableViaWWAN) {NSLog(@"cell"); }.....- (void) handleNetworkChange:(NSNotification *)notice{  NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus];   if(remoteHostStatus == NotReachable) {NSLog(@"no");}else if (remoteHostStatus == ReachableViaWiFi) {NSLog(@"wifi"); }else if (remoteHostStatus == ReachableViaWWAN) {NSLog(@"cell"); }}

[reachability setHostName:@"http://www.google.com"];

Attention! I encountered the problem that it's always "NotReachable" if the http:// prefix is used.

Raphael

Here's the right code as it works for me today!!!

[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(handleNetworkChange:) name: kReachabilityChangedNotification object: nil];reachability = [Reachability reachabilityForInternetConnection];[reachability startNotifier];NetworkStatus remoteHostStatus = [reachability currentReachabilityStatus];if(remoteHostStatus == NotReachable) {NSLog(@"no");}else if (remoteHostStatus == ReachableViaWiFi) {NSLog(@"wifi"); }else if (remoteHostStatus == ReachableViaWWAN) {NSLog(@"cell"); }