ios - 具有可达性的连接状态

Question

我在我的项目中使用可达性，当我尝试获取有关连接类型的信息时，我收到此错误。

*** Assertion failure in -[Reachability currentReachabilityStatus],/myProjectPath/Reachability.m:530
2012-04-03 21:25:45.619 Traffic[7862:11603] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'currentNetworkStatus called with NULL reachabilityRef'

我不知道我的代码有什么问题。我将与 ReachabilityAppDelegate 中相同的代码用于获取连接状态。

我的代码:

// get type of user connection
NSString* statusString= @"NA";

Reachability *curReach = [[Reachability alloc] init];
NetworkStatus netStatus = [curReach currentReachabilityStatus];
BOOL connectionRequired= [curReach connectionRequired];


switch (netStatus)
{
    case NotReachable:
    {
        statusString = @"NA";
        //Minor interface detail- connectionRequired may return yes, even when the host is unreachable.  We cover that up here...
        connectionRequired= NO;
        break;
    }

    case ReachableViaWWAN:
    {
        statusString = @"WWAN";
        break;
    }
    case ReachableViaWiFi:
    {
        statusString= @"WIFI";
        break;
    }
}

Answer 1

我遇到了同样的问题。在执行

之前，我正在检查 if reachability.currentReachabilityStatus() == NotReachable

reachability = Reachability.forInternetConnection()
reachability.startNotifier()

问题是您在启动通知程序之前要求状态，而 _reachabilityRef 为 nil。

确保您按照所需的顺序进行调用。首先启动通知程序，然后才检查/询问状态。