Reachability responding with wrong status code in iOS 7 iphone 5

问题

I am facing weird problem on iPhone 5 with iOS 7, i have tested same code with other devices like iPad1, 2, 3 and iPhone 4, 4s etc. with different iOS combination including iOS 7.

Problem :

When i turn on airplane mode i do get reachability notification as expected with status NotReachable but immediately after that app receives notification with status code ReachableViaWWAN which is not expected.

Code :

+(BOOL)checkReachability
{
    Reachability* internetReachable = [Reachability reachabilityForInternetConnection];
    NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
    switch (internetStatus)

    {
        case NotReachable:
        {
            DebugLog(@"The internet is down.");
            return NO;
            break;
        }
        default:
            return YES;
            break;
    }
    return YES;
}

I added log before switch which is returning status as ReachableViaWWAN in airplane mode..

Possible workaround could be:

Add case for ReachableViaWWAN and check host reachable in that case. And return BOOL value accordingly.

Anyone faced similar problem ?? i have searched but haven't found similar scenario.

Thanks in advance !!

回答1:

I had the same problem. The solution is to check the flag isConnectionRequired. The documentation says:

WWAN may be available, but not active until a connection has been established.

Code

BOOL isServerAvailable;
Reachability *reachability = [Reachability reachabilityForInternetConnection];

if ((reachability.isConnectionRequired) || (NotReachable == reachability.currentReachabilityStatus)) {
    isServerAvailable = NO;

} else if((ReachableViaWiFi == reachability.currentReachabilityStatus) || (ReachableViaWWAN == reachability.currentReachabilityStatus)){
    isServerAvailable = YES;
}

回答2:

The old Reachability files are no good. Apple has updated their reachability files.

Check here.

https://developer.apple.com/Library/ios/samplecode/Reachability/Introduction/Intro.html

Download here.

https://developer.apple.com/Library/ios/samplecode/Reachability/Reachability.zip

回答3:

I encountered this problem and found a solution here. Basically for some reason it's possible to get ReachableViaWWAN even when in airplane mode. However, there's another flag that will indicate whether a connection must first be established. This is the kSCNetworkReachabilityFlagsConnectionRequired flag which has a nice helper method in the Reachability class called connectionRequired

回答4:

Reachability classes can give strange results if you are using the Network Link Conditioner tool provided by Apple.

回答5:

 - (void)handleReachability:(Reachability *)reachability
{
    NetworkStatus netStatus = [reachability currentReachabilityStatus];
    BOOL connectionRequired = [reachability connectionRequired];
    NSString* statusString = @"";

    switch (netStatus)
    {
        case NotReachable:
        {

            if (connectionRequired) {
                [TSMessage setDefaultViewController:[UIApplication sharedApplication].keyWindow.rootViewController];

                [TSMessage showNotificationWithTitle:NSLocalizedString(@"Something failed", nil)
                                            subtitle:NSLocalizedString(@"The internet connection seems to be down. Please check that!", nil)
                                                type:TSMessageNotificationTypeError];
            }

            connectionRequired = NO;
            break;
        }
        default:
            break;


    }

}

来源：https://stackoverflow.com/questions/19949665/reachability-responding-with-wrong-status-code-in-ios-7-iphone-5

标签

ios

objective-c

ios7

iphone-5

reachability