为什么AFNetworking在没有互联网连接的情况下也能成功工作

Question

当我第一次在没有互联网连接的情况下完成这段代码时，它显示了警告它应该如何。但是，当我首先通过互联网连接成功地完成它，然后关闭互联网连接时，所有接下来的执行将使用相同的响应对象成功完成。没有在设备上试过，只在iOS模拟器上试过。

NSString *string = @"https://money.yandex.ru/api/categories-list";
NSURL *url = [NSURL URLWithString:string];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    [self deleteAllObjects];
    self.numberOfBranchObjects = 0;
    for (NSString *key in (NSDictionary *)responseObject) {
        [self insertNewObject:key fromSender:self];
    }
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather"
                                                        message:[error localizedDescription]
                                                       delegate:nil
                                              cancelButtonTitle:@"Ok"
                                              otherButtonTitles:nil];
    [alertView show];
}];
[operation start];

是否有任何缓存在AFNetworking响应对象或其他?

Answer 1

是的，它有缓存，给你:

[operpation setCacheResponseBlock:^NSCachedURLResponse *(NSURLConnection *connection, NSCachedURLResponse *cachedResponse) {
    return nil;
}];

我建议你在请求之前直接测试一下网络连接。

你可以把它放在视图控制器的初始化部分:

[[AFNetworkReachabilityManager sharedManager] startMonitoring];

然后在前面调用这个方法:

- (BOOL)connected {
    return [AFNetworkReachabilityManager sharedManager].reachable;
}