1. First artical, notice the last thing - Connecting the DataSource and Delegate:

http://www.appcoda.com/ios-programming-tutorial-create-a-simple-table-view-app/

2. Second Artical:

https://medium.com/@musawiralishah/creating-custom-uitableviewcell-using-nib-xib-files-in-xcode-9bee5824e722