BeeFileCache serialize崩溃

[Sunny-zhao]

• (NSData *)serialize:(id)obj
  {

  if ( [obj isKindOfClass:[NSData class]] )
  return obj;

  if ( [obj respondsToSelector:@selector(JSONData)] ) {

  NSData *data = [obj JSONData];
  return data;
  

  }
  return nil;
  }
  在iOS9上出现野指针问题