将UINavigationController添加到UIScrollView上

Question

我将一个NavigationController作为子VC放在ScrollView上。这是代码：

- (void)viewDidLoad {
  [super viewDidLoad];
  self.view.backgroundColor = [UIColor whiteColor];
  self.automaticallyAdjustsScrollViewInsets = YES;

  _scrollView = [UIScrollView newAutoLayoutView];
  _scrollView.alwaysBounceVertical = YES;
  _scrollView.delaysContentTouches = NO;

  [self.view addSubview:_scrollView];
  [_scrollView autoPinEdgesToSuperviewEdgesWithInsets:UIEdgeInsetsMake(0, 0, 0, 0)];

  _contentView = [UIView newAutoLayoutView];

  UIView *yellowView = [UIView newAutoLayoutView];
  yellowView.backgroundColor = [UIColor yellowColor];
  [_contentView addSubview:yellowView];
  [yellowView autoPinEdgeToSuperviewEdge:ALEdgeTop];
  [yellowView autoSetDimensionsToSize:CGSizeMake(kScreenWidth, kScreenHeight)];

  [_scrollView addSubview:_contentView];

  _settingsNavigationController = [UINavigationController new];

  [self addChildViewController:_settingsNavigationController];
  [_contentView addSubview:_settingsNavigationController.view];
  [_settingsNavigationController didMoveToParentViewController:self];

  [_settingsNavigationController.view autoSetDimensionsToSize:CGSizeMake(kScreenWidth, kScreenHeight)];
  [_settingsNavigationController.view autoPinEdge:ALEdgeTop toEdge:ALEdgeBottom ofView:yellowView];
  [_settingsNavigationController.view layoutSubviews];

  [_contentView autoPinEdge:ALEdgeBottom toEdge:ALEdgeBottom ofView:_settingsNavigationController.view];
  [_contentView autoPinEdgesToSuperviewEdgesWithInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
  [_contentView autoPinEdge:ALEdgeLeading toEdge:ALEdgeLeading ofView:self.view];
}

- (void)viewWillAppear:(BOOL)animated {
  [super viewWillAppear:animated];
  self.navigationController.navigationBarHidden = NO;
}

- (void)viewDidAppear:(BOOL)animated {
  [super viewDidAppear:animated];

  PCConfigViewController *configViewController = [PCConfigController new];
  configViewController.morning = YES;
  configClockViewController.delegate = self;
  [_settingsNavigationController setViewControllers:[NSArray arrayWithObject:configViewController] animated:YES];
}

- (void)didReceiveMemoryWarning {
  [super didReceiveMemoryWarning];
}

我可以滚动到NavigationController并查看其根视图控制器，但它不响应触摸，即使NavigationController被添加为子视图控制器。任何想法，或如何使其响应触摸？