TextField in UITable Scroll on KeyBoard

I have UITextField in UITableView and When I am clicking on the UITextField then I have moved the offset, But My Question is when the user scroll to next field then it show weird behaviour some time input refreshes or the fo开发者_JAVA百科cus will return to previous UITextField.

See this code and impelement According ur project

• (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{

  [self scrollViewToCenterOfScreen:textField];
  return YES; }

• (void)scrollViewToCenterOfScreen:(UIView *)theView {
  CGFloat viewCenterY = theView.center.y;
  CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];

  CGFloat availableHeight = applicationFrame.size.height - 200; // Remove area covered by keyboard

  CGFloat y = viewCenterY - availableHeight / 2.0;
  if (y < 0) {
  y = 0;
  }
  [scrollview setContentOffset:CGPointMake(0, y) animated:YES];

}

-(BOOL) textFieldShouldReturn:(UITextField *)textField{

if ([textField isEqual:txtStAppField])
{
    [txtStConfirmField becomeFirstResponder];
}
else if ([textField isEqual:txtStConfirmField])
{
    [txtDummyAppField becomeFirstResponder];
}
else if ([textField isEqual:txtStConfirmField])
{
    [txtDummyConfirmFeild becomeFirstResponder];
}
else 
{
    [textField resignFirstResponder];       
    [scrollview setContentOffset:CGPointMake(0, 0) animated:YES];
}

return YES;

}

// txtStConfirmField,txtDummyConfirmFeild,txtDummyAppField,txtStConfirmField,txtStConfirmField are tectField name.