if you’ve implemented jQuery UI Autocomplete library (version 1.11.0) in your web project, you might aware that you have to tap twice (double tap) on the Autocomplete drop down item in iOS devices (such as iPhone & iPad). This is the fixed version for the iOS problem. Now, please try again, type "Ja" in the search box below, and you will find that you will no longer needed to tap twice on the matched item to select them! Hooray!
Click here to continue reading the tutorial, find out how to fix the iOS bugs - jQuery UI Autocomplete Hover Issue Hacks For iOS