ios - 转换到 ViewController 会离开前一个 View 的导航栏

Question

我希望通过从 stackoverflow 获得的这种转换以编程方式导航到 ViewController。

  CATransition* transition = [CATransition animation];
  transition.duration = .45;
  transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
  transition.type = kCATransitionFade;
  self.navigationController.view.layer addAnimation:transition forKey:kCATransition];

  UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
  AddDeviceViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"AddDeviceViewController"];
  self.navigationController pushViewController:vc animated:NO];

但是当它转换到 View 时，前一个 View 的导航栏会保留。如何使过渡 View 的导航栏出现而不是前一个？

Answer 1

实现viewWillAppear和 viewWillDisappear在您的 AddDeviceViewController .在 viewWillAppear隐藏 navigation bar在 viewWillDisappear显示 navigation bar .此机制仅隐藏 AddDeviceViewController 的导航栏.就像是，

 -(void)viewWillAppear:(BOOL)animated{

     self.navigationController.navigationBar.hidden = YES;
 }

 -(void)viewWillDisappear:(BOOL)animated{

       self.navigationController.navigationBar.hidden = NO;
 }