message: Fired tabPress if initial tab isn't 0
  Matches with android
diff: _pageViewController = [[UIPageViewController alloc] init];
  [self addSubview:_pageViewController.view];
  _tabs = [[NSMutableArray alloc] init];
  - _selectedIndex = NSNotFound;
  + _selectedIndex = 0;
  }
  return self;
  }
  - (void)setCurrentTab:(NSInteger)index
  {
  - if (index != _selectedIndex && _selectedIndex != NSNotFound) {
  + if (index != _selectedIndex) {
  _nativeEventCount++;
  self.onTabSelected(@{
  @"tab": @(index),
  