How IOS resolves unable to hide the keyboard (ii)

Problem: Just as a problem can be solved, but the wonderful things come out. Click on the other page of UITableView, unable to trigger Didselect: method.

Reason:

Should be compiled, Apple automatically compiled this extension, causing all uitableview to have this extension, resulting in the inability to click UITableView.

Workaround:

On the desired class, write the extension, do not write in the Create extension file. This is also a big pit = =

How IOS resolves unable to hide the keyboard (ii)