iOS：AFN网络的可达性

我用这种方法做了一批操作，效果很好

NSMutableArray *mutableOperations = [NSMutableArray array];
    for (NSString *stringURL in url_list) {

        NSURL *url = [NSURL URLWithString:stringURL];
        NSURLRequest *request = [NSURLRequest requestWithURL:url];

        AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
        operation.responseSerializer = [AFHTTPResponseSerializer serializer];
        [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

            [self addDataToTotal:[self parseJSONfile:responseObject]];

        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
            NSLog(@"Error: %@", error);
        }];

        [mutableOperations addObject:operation];
    }

    NSArray *operations = [AFURLConnectionOperation batchOfRequestOperations:mutableOperations progressBlock:^(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations) {
        NSLog(@"progress:%f", (float)numberOfFinishedOperations / totalNumberOfOperations);
    } completionBlock:^(NSArray *operations) {
        NSLog(@"All operations in batch complete");
        [self startPopulateDBStructure:self.total];
    }];
    [[NSOperationQueue mainQueue] addOperations:operations waitUntilFinished:NO];

现在我想使用“可达性属性”来检查连接状态，我这样做了

[[[NSOperationQueue mainQueue]reachabilityManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        switch (status) {
            case AFNetworkReachabilityStatusReachableViaWWAN:
            case AFNetworkReachabilityStatusReachableViaWiFi:
                [[NSOperationQueue mainQueue] setSuspended:NO];
                break;
            case AFNetworkReachabilityStatusNotReachable:
            default:
                [[NSOperationQueue mainQueue] setSuspended:YES];
                break;
        }
    }];

但是我得到了一个崩溃的消息，问题在哪里

[NSOperationQueue reachabilityManager]: unrecognized selector sent to instance

---

您正试图从主

NSOperationQueue

获取

reachabilityManager

，而主

没有。您应该使用
[AFNetworkReachabilityManager sharedManager]
获取
reachabilityManager
实例


因此：


还考虑尝试暂停主队列的逻辑。您可能想做的是从
AFHTTPRequestOperationManager
实例获取
operationQueue
，并挂起该…
尝试以下操作：

     [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
            switch (status) {
            case AFNetworkReachabilityStatusReachableViaWWAN:
            case AFNetworkReachabilityStatusReachableViaWiFi:
                [[NSOperationQueue mainQueue] setSuspended:NO];
                break;
            case AFNetworkReachabilityStatusNotReachable:
            default:
                [[NSOperationQueue mainQueue] setSuspended:YES];
                break;
        }
}];

您可以将@Simonly的答案简化为：

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        [[NSOperationQueue mainQueue] setSuspended:![AFNetworkReachabilityManager sharedManager].reachable];
    }
}];

@Wain是对的，暂停主队列听起来不是一个好计划

使用
AFHTTPRequestOperationManager
并分配您自己的操作队列。
以及如何获取它？好的，这个“[AFNetworkReachabilityManager sharedManager]”适用于“[NSOperationQueue mainQueue]”？可访问性管理器与操作队列无关。您似乎不太可能尝试挂起主队列……那么我是否应该使用“AFHTTPRequestOperationManager”来正确执行批处理操作？不仅仅是NSOperationQueueok，但我不明白，因为在AFNetworking 2.0中的批处理操作指南中，建议我这样做，而不要使用管理器
[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        [[NSOperationQueue mainQueue] setSuspended:![AFNetworkReachabilityManager sharedManager].reachable];
    }
}];