What most people mean by autocomplete is that the app has a textview/searchbar/whatever which accepts user input. Attached to this component is a tableview which keeps updating
Alternatively, you can use this UITextField subclass (inspired by DOAutocompleteTextField):
https://github.com/hoteltonight/HTAutocompleteTextField
It's got a few more features and is actively developed. The example shows you how to use an array as the data source for the autosuggest text.
I haven't tried it but here's a control that appears to do what you're asking for:
http://cocoacontrols.com/platforms/ios/controls/doautocompletetextfield