IOS测试网络状态

/第一次打开时判断网络状态
- (int) connectedToNetwork
{
    NSString *kindStr;
    int kind;
    //创建零地址，0.0.0.0的地址表示查询本机的网络连接状态
    struct sockaddr_in zeroAddress;
    bzero(&zeroAddress, sizeof(zeroAddress));
    zeroAddress.sin_len = sizeof(zeroAddress);
    zeroAddress.sin_family = AF_INET;
    // Recover reachability flags
    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);
    SCNetworkReachabilityFlags flags;
    //获得连接的标志
    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
    CFRelease(defaultRouteReachability);
    //如果不能获取连接标志，则不能连接网络，直接返回
    if (!didRetrieveFlags)
    {
        kindStr = @"获取信息失败";
        kind = -1;
    }
    else{
        //根据获得的连接标志进行判断
        BOOL isReachable = flags & kSCNetworkFlagsReachable;
        BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;
        if((isReachable && !needsConnection)==YES)
        {
            ///能够连接网络
            if((flags& kSCNetworkReachabilityFlagsIsWWAN)==kSCNetworkReachabilityFlagsIsWWAN)
            {
                kindStr = @"手机网络";
                kind = 0;
            }
            else
            {
                kindStr =@"wifi连接网络";
                kind = 1;
            }
        }
        else{
            kindStr =@"不能连接网络";
            kind = -1;
        }
    }
    return kind;
}
设置网络监听
-(void)SetJianCeNetwork
{
    //开启网络状况的监听
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(reachabilityChanged:)
                                                 name: kReachabilityChangedNotification
                                               object: nil];
    hostReach = [[Reachability reachabilityWithHostname:@"www.xtox.net"] retain];//可以以多种形式初始化
    [hostReach startNotifier];  //开始监听,会启动一个run loop
}
// 连接改变
- (void) reachabilityChanged: (NSNotification* )note
{
    Reachability* curReach = [note object];
    NSParameterAssert([curReach isKindOfClass: [Reachability class]]);
    [self updateInterfaceWithReachability: curReach];
}
//处理网络连接改变后的情况
- (void) updateInterfaceWithReachability: (Reachability*) curReach
{
    //对连接改变做出响应的处理动作。
    NetworkStatus status = [curReach currentReachabilityStatus];
    if (status == NotReachable)
    {  //没有连接到网络就弹出提实况
        isNetType = -1;
        UIAlertView *alert =[[UIAlertView alloc]initWithTitle:nil message:@"网络连接失败,请检查网络" delegate:self cancelButtonTitle:@"确定" otherButtonTitles: nil];
        [alert show];
        [alert release];
    }
    else if(status == ReachableViaWiFi ||status == ReachableViaWWAN)
    {
        if(status == ReachableViaWWAN)
        {
            isNetType = 0;
        }
        else if(status == ReachableViaWiFi)
        {
            isNetType = 1;
        }
        //
        NSThread *initThread = [[NSThread alloc]initWithTarget:self selector:@selector(InitThreadFunc:) object:self];
        [initThread start];
        return;
    }
}
-(void)InitThreadFunc:(id)sender
{
    //isNetType = [self connectedToNetwork];
    if(isNetType!=-1)
    {
        if([g_json Test]==YES)
        {
           [g_json UserLogin:0 pass:nil];
            [self GetUpdate];
            return;
        }
        else
        {
            isNetType = -1;
        }
    }
}