//阻塞

- (User *)findUser:(NSNumber *)userID

{

    NSString *url = [NSString stringWithFormat:@"%@/s/account/find-user/",ServerBaseURL];

    NSMutableDictionary *requestParms = [[NSMutableDictionary alloc] init];

    [requestParms setObject:userID forKey:@"userId"];

    AFJSONRequestSerializer *requestSerializer = [AFJSONRequestSerializer serializer];

    NSMutableURLRequest *request = [requestSerializer requestWithMethod:@"POST" URLString:url parameters:requestParms error:nil];

    AFHTTPRequestOperation *requestOperation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

    AFHTTPResponseSerializer *responseSerializer = [AFJSONResponseSerializer serializer];

    [requestOperation setResponseSerializer:responseSerializer];

    [requestOperation start];

    [requestOperation waitUntilFinished];

    NSDictionary *userInfo = [[requestOperation responseObject] objectForKey:@"user"];

    if (userInfo != nil) {

这里对结果处理

return xxxx

    }

    return nil;

}

//异步

    NSString *url = [NSString stringWithFormat:@"%@/s/account/signin/", ServerBaseURL];

    NSMutableDictionary *requestParms = [[NSMutableDictionary alloc] init];

//设置参数

    [requestParms setObject:loginName forKey:@"loginname"];

    [httpManager POST:url parameters:requestParms

              success:^(AFHTTPRequestOperation *operation, id responseObject) {

//成功

              } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

//失败

              }];