title: UITextField is not working in IOS8
body: <p><code>UITextField</code> is not working in iOS8, I am unable to see keyboard when clicking on text box and not see any crash. But it is working fine in iOS7 devices. 
  I am using following code:</p>
  
  <pre><code>UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"TF_MSG_ ENTER", @"") message:@"\n\n" delegate:self cancelButtonTitle:NSLocalizedString(@"TF_CANCEL_TEXT", @"") otherButtonTitles:NSLocalizedString(@"TF_MSG_ OK", @""), nil];
  
      UITextField *txBookmarkName = nil;
  
    if ([[UIDevice currentDevice].systemVersion floatValue] &gt;= 7.0)
    {
      txBookmarkName = [[UITextField alloc] initWithFrame:CGRectMake(12.0f, 45.0f, 260.0f, 25.0f)];
      myAlert.alertViewStyle = UIAlertViewStylePlainTextInput;
      txBookmarkName = [myAlert textFieldAtIndex:0];
    }
    else
    {
      txBookmarkName = [[UITextField alloc] initWithFrame:CGRectMake(12.0f, 45.0f, 260.0f, 25.0f)];
      IF_PRE_IOS4 (
                   [txBookmarkName release], txBookmarkName = nil;
                   txBookmarkName = [[UITextField alloc] initWithFrame:CGRectMake(12.0f, 65.0f, 260.0f, 25.0f)];
                   );
    }
      [txBookmarkName setDelegate:self];
      [txBookmarkName setText:nameLabel.text];
      myAlert.tag=TF_TAG_TEXT_FIELD_RENAME;
      [txBookmarkName setBorderStyle:UITextBorderStyleRoundedRect];
      [txBookmarkName becomeFirstResponder];
      [txBookmarkName setAutocorrectionType:UITextAutocorrectionTypeNo];
      txBookmarkName.tag=TF_TAG_TEXTFIELD;
      [myAlert addSubview: txBookmarkName];
      [myAlert setFrame:CGRectMake(0, 0, 300,50)];
      IF_PRE_IOS4 (
                               CGAffineTransform t = CGAffineTransformMakeTranslation(0.0f, 85.0f);
                               [myAlert setTransform: t];
                               );
      [myAlert show];
      [txBookmarkName release];
    if ([[UIDevice currentDevice].systemVersion floatValue] &lt; 7.0)
      [myAlert release];
  </code></pre>
  
  <p>Please help me. </p>
  
  <p>Thanks in Advance.</p>