AFN请求失败报错：
Error Domain=com.alamofire.error.serialization.response Code=-1016 "Request failed: unacceptable content-type: text/html"
1.接收对象里添加 @"text/html"
self.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"text/plain",@"application/json",@"text/json", @"text/javascript",nil];
2.去掉
self.responseSerializer = [AFJSONResponseSerializer serializer];
