Reachability.m 中 networkStatusForFlags 方法重构

//Reachability.m 中 networkStatusForFlags 方法重构

- (NetworkStatus) networkStatusForFlags: (SCNetworkReachabilityFlags) flags

{

    if((flags & kSCNetworkReachabilityFlagsReachable) == 0)

    {

        returnNotReachable;

    }

     

    BOOLretVal = NotReachable;

     

    if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0)

    {

        // if target host is reachable and no connection is required

        //  then we'll assume (for now) that your on Wi-Fi

        retVal = ReachableViaWiFi;

    }

     

     

    if((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||

         (flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0))

    {

        // ... and the connection is on-demand (or on-traffic) if the

        //     calling application is using the CFSocketStream or higher APIs

        if((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0)

        {

            // ... and no [user] intervention is needed

            retVal = ReachableViaWiFi;

        }

    }

     

    if((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)

    {

        if((flags & kSCNetworkReachabilityFlagsReachable) == kSCNetworkReachabilityFlagsReachable) {

            if((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection) {

                retVal = ReachableVia3G;

                if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired) {

                    retVal = ReachableVia2G;

                }

            }

        }

    }

    returnretVal;

}

 

//检查当前网络连接是否正常

-(BOOL)connectedToNetWork

{

    structsockaddr_in zeroAddress;

    bzero(&zeroAddress,sizeof(zeroAddress));

    zeroAddress.sin_len = sizeof(zeroAddress);

    zeroAddress.sin_family = AF_INET;

     

    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (structsockaddr *)&zeroAddress);

    SCNetworkReachabilityFlags flags;

     

    BOOLdidRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);

    CFRelease(defaultRouteReachability);

     

    if(!didRetrieveFlags) {

        printf("Error. Count not recover network reachability flags\n");

        returnNO;

    }

     

    BOOLisReachable = flags & kSCNetworkFlagsReachable;

    BOOLneedsConnection = flags & kSCNetworkFlagsConnectionRequired;

    return(isReachable && !needsConnection) ? YES: NO;

}

 

//检查网络连接类型

-(void)checkNetworktype:(id)sender{

    NSString*connectionKind;

    if([selfconnectedToNetWork]) {

        hostReach = [Reachability reachabilityWithHostName:@"www.google.com"];

        switch([hostReach currentReachabilityStatus]) {

            caseNotReachable:

                connectionKind = @"没有网络链接";

                break;

            caseReachableViaWiFi:

                connectionKind = @"当前使用的网络类型是WIFI";

                break;

            caseReachableVia3G:

                connectionKind = @"当前使用的网络链接类型是WWAN（3G）";

                break;

            caseReachableVia2G:

                connectionKind = @"当前使用的网络链接类型是WWAN（2G）";

                break;    

            default:

                break;

        }

    }else{

        connectionKind = @"没有网络链接";

    }

}