title: UITableView cell with collection view
body: <p>I have created a .xib file for TableView cell, and I want to add a collection view into that cell. <a href="https://i.stack.imgur.com/2OHtX.png" rel="nofollow noreferrer">picture</a> The gray rectangle shown in the picture is a collection view, my question is why the collection view doesn't show a prototype cell. What did I do wrong? Or this is what it should be, then how can I add a prototype cell? By making another .xib file for the UICollectionVew Cell?</p>