失敗的配置如下：
sessionManager.requestSerializer = [AFJSONRequestSerializer serializer];
[sessionManager.requestSerializer setValue:@"application/x-www-form-urlencoded;charset=utf-8" forHTTPHeaderField:@"Content-Type"];
sessionManager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", @"text/plain",nil];
sessionManager.requestSerializer.timeoutInterval = 30.0;
NSSet *set = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", @"text/xml", @"text/plain", nil];
sessionManager.responseSerializer.acceptableContentTypes = [sessionManager.responseSerializer.acceptableContentTypes setByAddingObjectsFromSet:set];
[sessionManager POST:urlString parameters:params headers:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
}];
一直失敗
修復(fù)方案：
刪除如下代碼接口炉抒，可能重置了NFNetwork內(nèi)部的設(shè)置信息
sessionManager.requestSerializer = [AFJSONRequestSerializer serializer];
