// 请求参数
    NSMutableDictionary *baseParameters = [self baseParametes];
    [baseParameters setObject:apikey forKey:@"apikey"];
    [baseParameters setObject:secret forKey:@"secret"];
    [baseParameters setObject:sn forKey:@"sn"];
    [baseParameters setObject:filename forKey:@"filename"];
    [baseParameters setObject:objectname forKey:@"objectname"];
    [baseParameters setObject:clienttype forKey:@"clienttype"];
    [baseParameters setObject:@(filetype) forKey:@"filetype"];
    [baseParameters setObject:@(filesize) forKey:@"filesize"];
    [baseParameters setObject:time forKey:@"time"];
    
    // 网络加载标志
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
    
    // AF
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    // multipart/form-data
    [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [manager.requestSerializer setValue:@"multipart/form-data" forHTTPHeaderField:@"Content-Type"];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", @"text/xml", @"text/plain", nil];
    
    [manager POST:[NSString stringWithFormat:@"%@%@",URL_OssFile,url]
       parameters:nil
constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
    NSData *data = [NSJSONSerialization dataWithJSONObject:baseParameters options:NSJSONWritingPrettyPrinted error:nil];
    //[formData appendPartWithHeaders:@{@"Content-Type":@"multipart/form-data"} body:data];
    [formData appendPartWithFormData:data name:@"log"];
}
         progress:nil
          success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
              [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
              callback(responseObject,nil);
          }
          failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
              [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
              saveLogFailed(K__ERROR);
          }];