title: uipopover hides when keyboard shows
body: <p>i have an UIpopover with UItextfield in it, when i open popover and tap on uitextfield then keyboard shows, but it hide the popover. How can i show keyboard without hiding UIpopover?<br>
  i am calling popover in UIWebView because i use cordova 1.8.1, but i tried it in UIView too, and it hides too.
  here code of calling UIpopover :</p>
  
  <pre><code>if (popEl==nil){
      popEl=[[Popover alloc] init];
  }
  if (pcs==nil){
      pcs=[[UIPopoverController alloc] initWithContentViewController:popEl];
      pcs.delegate=self;
  }
  [pcs presentPopoverFromRect:CGRectMake(0, 0, 1, 1) inView:self.webView permittedArrowDirections:UIPopoverArrowDirectionUp animated:NO];
  </code></pre>
  
  <p>P.S. Sorry for my English, i am from Ukraine.  </p>