如何在标题中使用自定义视图控制器修复UITableView中的平滑滚动问题？

I have created a tableview in such a way that all the rows are of 0 height but with custom headers. I am displaying different view controllers in different headers. I am able to parse the table properly but when I scroll down, it doesn't scroll smoothly. The view controllers I added in the headers are mostly collection view and page view controllers, which display images. What can I do to fix this issue? Thanks in advance!I have created a tableview in such a way that a