可达性无法按预期工作

Question

从Apple下载Reachability,使用此方法检查活动连接:

-(BOOL)isReachable{

    Reachability *r = [Reachability reachabilityWithHostName:@"http://www.google.com"];

    if(NotReachable == [r currentReachabilityStatus]) {
        NSLog(@"Not Reachable");
        return NO;
    }

    NSLog(@"Reachable");
    return YES;  

}

尽管连接了,但每次都返回NO？无法弄清楚为什么......

有任何想法吗？谢谢.

在旁注,任何人都可以推荐一个很好的清洁Reachability单件类？

Answer 1

已编辑:您应该http从reachabilityWithHostName通话中删除协议,然后将其更新为

 Reachability *reachability = [Reachability reachabilityWithHostname:@"www.google.com"];
 NetworkStatus netStatus = [reachability currentReachabilityStatus];

Answer 2

使用此代码检查设备是否已连接到互联网

在viewDidLoad中使用此代码:

 Reachability* internetReachable; = [Reachability reachabilityForInternetConnection];
    [internetReachable startNotifier];

    hostReachable = [Reachability reachabilityWithHostName: @"www.apple.com"] ;
    [hostReachable startNotifier];

并将此函数添加到您的代码:

-(void) checkNetworkStatus:(NSNotification *)notice
{
    recheabilityBool=FALSE;
    nonrecheabilityBool=FALSE;
    // called after network status changes
    NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
    switch (internetStatus)
    {
        case NotReachable:
        {
            nonrecheabilityBool=TRUE;
            internetCon=0;
            //NSLog(@"The internet is down.");


            break;
        }
        case ReachableViaWiFi:
        {
            NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
            internetCon=404;
            [prefs setInteger:internetCon forKey:@"conKey"];

            //NSLog(@"The internet is working via WIFI.");
            break;

        }
        case ReachableViaWWAN:
        {
            //NSLog(@"The internet is working via WWAN.");

            break;
        }
    }

    NetworkStatus hostStatus = [hostReachable currentReachabilityStatus];
    switch (hostStatus)
    {
        case NotReachable:
        {
            internetCon=0;
            if( nonrecheabilityBool==FALSE)
            {
                //NSLog(@"A gateway to the host server is down.");
            }
            break;

        }
        case ReachableViaWiFi:
        {
            if(recheabilityBool==FALSE)
            {

                recheabilityBool=TRUE;

                NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
                internetCon=404;
                [prefs setInteger:internetCon forKey:@"conKey"];


                //NSLog(@"The internet is working via WIFI.");
                break;
            }


            //NSLog(@"A gateway to the host server is working via WIFI.");

            break;
        }
        case ReachableViaWWAN:
        {
            //NSLog(@"A gateway to the host server is working via WWAN.");
            break;
        }
    }
}


- (BOOL)connected
{
    Reachability *reachability = [Reachability reachabilityForInternetConnection];
    NetworkStatus networkStatus = [reachability currentReachabilityStatus];
    return !(networkStatus == NotReachable);
}