childViewController 小计

self.ganZhi_vc = [board instantiateViewControllerWithIdentifier:@"HDGanZhiViewController"];
    [self addChildViewController:self.ganZhi_vc];
    
    self.data_vc = [board instantiateViewControllerWithIdentifier:@"HDDataViewController"];
    [self addChildViewController:self.data_vc];
    
    self.map_vc = [board instantiateViewControllerWithIdentifier:@"HDMapViewController"];
    [self addChildViewController:self.map_vc];
    
    self.code_vc = [board instantiateViewControllerWithIdentifier:@"HDCodeViewController"];
    [self addChildViewController:self.code_vc];
    
    [self.view addSubview:self.root_vc.view];
    [self.root_vc didMoveToParentViewController:self];
    _currentViewController = self.root_vc;

-(void)changeViewControllerWith:(UIViewController *)temp
{
    if (_currentViewController != temp) {
        __weak ViewController *weaSelf = self;
        [self transitionFromViewController:_currentViewController toViewController:temp duration:1.0 options:UIViewAnimationOptionLayoutSubviews animations:nil completion:^(BOOL finished) {
        }];
        _currentViewController = temp;
    }
    
}