• (void)setupSegment
  {
  NSArray *array = @[@"部门",@"职位"];
  [self.segment setSectionTitles:array];

  self.segment.borderType = HMSegmentedControlBorderTypeBottom;
  self.segment.borderWidth = 0.5;

  self.title = @"部门管理";

  // 添加子控制器
  // MEDPBDepartmentCollectionViewController *department = [[MEDPBDepartmentCollectionViewController alloc] init];
  [self addChildViewController:[[MEDPBDepartmentCollectionViewController alloc] init]];
  // MEDPBPositionTableViewController *position = [[MEDPBPositionTableViewController alloc] init];
  [self addChildViewController:[[MEDPBPositionTableViewController alloc] init]];

  // 默认页面
  UIViewController *vc = [[self childViewControllers] objectAtIndex:0];
  vc.view.frame = self.contentView.bounds;
  [self.contentView addSubview:vc.view];

  // 绑定事件
  [self.segment addTarget:self action:@selector(segmentClick:) forControlEvents:UIControlEventValueChanged];
  }

• (void)segmentClick:(UISegmentedControl *)segment
  {
  NSInteger index = segment.selectedSegmentIndex;

  UIViewController *fromVC = nil;
  for (UIViewController *vc in self.childViewControllers) {
  if (vc.view.superview == self.contentView) {
  fromVC = vc;
  break;
  }
  }
  UIViewController *toVC = [self.childViewControllers objectAtIndex:index];
  if (fromVC != toVC) {
  [self transitionFromViewController:fromVC toViewController:toVC duration:0.5 options:UIViewAnimationOptionCurveEaseInOut animations:NULL completion:NULL];
  }

}

• (void)transitionFromViewController:(UIViewController *)fromViewController toViewController:(UIViewController *)toViewController duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL))completion
  {
  toViewController.view.frame = fromViewController.view.frame;
  [super transitionFromViewController:fromViewController toViewController:toViewController duration:duration options:options animations:animations completion:completion];
  }