title: Flutter(iOS) -"No CupertinoLocalizations found", how fix it?
body: <p>I using TextField in my flutter  app. It worked on on  android. but on  ios  when I try to paste from the clipboard into the field I get the error:</p>
  <pre><code> No CupertinoLocalizations found.
  _CupertinoTextSelectionControlsToolbar widgets require CupertinoLocalizations to be provided by a Localizations widget ancestor.
  The cupertino library uses Localizations to generate messages, labels, and abbreviations.
  To introduce a CupertinoLocalizations, either use a CupertinoApp at the root of your application to include them automatically, 
  The specific widget that could not find a CupertinoLocalizations ancestor was: _CupertinoTextSelectionControlsToolbar
  </code></pre>
  <p><a href="https://i.stack.imgur.com/VKeeR.png" rel="noreferrer"><img src="https://i.stack.imgur.com/VKeeR.png" alt="enter image description here" /></a></p>
  <p>This is part of my code, main page:</p>
  <pre><code>return Localizations(
    locale: Locale('en'),
    delegates: [
      GlobalMaterialLocalizations.delegate,
      DefaultCupertinoLocalizations.delegate,
      DefaultWidgetsLocalizations.delegate,
    ],
    child: CupertinoTabScaffold(
       tabBar: CupertinoTabBar(...)
       ....
    )
  </code></pre>
  <p>in each tabs I use this page:</p>
  <pre><code> return MaterialApp(
   navigatorKey: navKey,    
   home: child,);
  </code></pre>
  <p>I have separate navigation in each tab.</p>
  <p>how do I fix this? any ideas? I will be grateful</p>