title: swift 3 - search result also with diacritics
body: <p>In my application I use a search that works well but I need advice. I do not know how to do that when I search for text without diacritics that the result also with diacritics. <strong>Example:</strong> Enter a search holesovice, I need to find <strong>holesovice</strong> and also <strong>holešovice</strong>.</p>
  
  <p><strong>Here is part of my code:</strong></p>
  
  <pre><code>func filterContentForSearchText(_ searchText: String) {
          filteredERequests = requests.filter({( request : CityRequest) -&gt; Bool in
  
              return request.cityName.lowercased().contains(searchText.lowercased())
  
          })
          myTable.reloadData()
      }
  </code></pre>