由于我将 AFNetworking 从 3.0.4 更新到 3.1.0，因此下载文件时出现错误 -999。我正在使用一些数据向服务器发出发布请求，如果数据有效，则将下载文件，否则将返回错误 JSON。
这是代码：
AFSecurityPolicy *policy = [[AFSecurityPolicy alloc] init];
[policy setAllowInvalidCertificates:YES];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager setSecurityPolicy:policy];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
manager.responseSerializer = [AFCompoundResponseSerializer serializer];
[manager.requestSerializer setTimeoutInterval:DEFAULT_TIMEOUT];
[manager POST:[[BASE_URL stringByAppendingString:ACTION_UPDATE_DB] stringByAppendingString:API_KEY]
parameters:defaultData
progress:nil
success:^(NSURLSessionDataTask * _Nonnull task, id responseObject) {
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
}];
我试过改变这个，但结果相同。
AFSecurityPolicy* policy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeCertificate];
[policy setAllowInvalidCertificates:YES];
[policy setValidatesDomainName:NO];