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我使用“pod install”安装 AFNetworking 2.0，并使用 App.xcworkspace。使用 AFNetworking 2.0，我成功发送了 POST 请求，但在可达性方面我遇到了问题。我需要监视套接字何时打开和关闭，我的代码不起作用，我忘记了什么？

// Check server socket available
struct sockaddr_in serverAddr;
serverAddr.sin_family = AF_INET;
serverAddr.sin_len = sizeof(serverAddr);
serverAddr.sin_port = htons(80);
serverAddr.sin_addr.s_addr = inet_addr("192.168.1.108");

AFNetworkReachabilityManager *reachability = [AFNetworkReachabilityManager managerForAddress:&serverAddr];
[reachability setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
    switch (status) {
        case AFNetworkReachabilityStatusNotReachable:
            NSLog(@"No Internet Connection");
            break;
        case AFNetworkReachabilityStatusReachableViaWiFi:
            NSLog(@"WIFI");
            break;
        case AFNetworkReachabilityStatusReachableViaWWAN:
            NSLog(@"3G");
            break;
        default:
            NSLog(@"Unknown network status");
            break;
    }
}];
[reachability startMonitoring];
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1 回答 1

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我想我弄清楚了这个问题。看起来 AFNetworking 的回调机制无法正常工作 - 查看 AFNetworkReachabilityManager 的startMonitoring方法：有一个：

        if (strongSelf.networkReachabilityStatusBlock) {...

无论您是否设置了回调，这似乎都失败了。

为了解决这个问题，我向 AFNetworkReachabilityManager 添加了以下方法：

- (void)startMonitoringWithStatusChangeBlock:(void (^)(AFNetworkReachabilityStatus status))block
{
    [self stopMonitoring];

    if (!self.networkReachability) {
        return;
    }

    __weak __typeof(self)weakSelf = self;
    AFNetworkReachabilityStatusBlock callback = ^(AFNetworkReachabilityStatus status) {
        __strong __typeof(weakSelf)strongSelf = weakSelf;

        strongSelf.networkReachabilityStatus = status;
        if (block) {
            block(status);
        }
    };

    SCNetworkReachabilityContext context = {0, (__bridge void *)callback, AFNetworkReachabilityRetainCallback, AFNetworkReachabilityReleaseCallback, NULL};
    SCNetworkReachabilitySetCallback(self.networkReachability, AFNetworkReachabilityCallback, &context);

    SCNetworkReachabilityFlags flags;
    SCNetworkReachabilityGetFlags(self.networkReachability, &flags);
    dispatch_async(dispatch_get_main_queue(), ^{
        AFNetworkReachabilityStatus status = AFNetworkReachabilityStatusForFlags(flags);
        callback(status);
    });

    SCNetworkReachabilityScheduleWithRunLoop(self.networkReachability, CFRunLoopGetMain(), kCFRunLoopCommonModes);
}

这基本上做同样的事情，但从方法参数而不是从可达性管理器的属性引用块。

于 2013-11-13T13:18:48.070 回答