objective-c - ios code =-1001 请求超时

如图这是报的错误

NSDictionary *parameter=@{@"start":@(start),@"uid":@([LocalStore getUid]),@"muid":[LocalStore getMuid],@"count":@(count)};

[_manager POST:NET_DOMAIN parameters:parameter progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
    NSNumber *error_code = [responseObject objectForKey:@"status"];
    if([error_code intValue] == 1){
        completion(YES, [responseObject objectForKey:@"data"], 0);
    }else{
        completion(NO, [responseObject objectForKey:@"data"], 1);
    }
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
    NSLog(@"error:%@",error);
    if ([error code] == -1005) {
        [self getAloneList:start andCount:count andblock:completion];
    }else{
        if (_is_hand_break == NO) {

// completion(NO, [self getErrorMsg:error], 1);

            completion(NO, [NSString stringWithFormat:@"%@",error], 1);
        }
    }
}];

这是代码 有的时候会报这个错误 这是为什么 求解答