FirstViewController不适用于删除SecondViewController的子视图

Question

First View Controller

I'm using a UIStoryBoard to allow the FirstViewController to add the view of second ViewController as a subview. On removing the sub view the

  - (IBAction) btnMoveTo:(id)sender
{

 UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
 UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"Second"];
 vc.view.backgroundColor = [UIColor clearColor];
 self.modalPresentationStyle = UIModalPresentationCurrentContext;
 [self presentModalViewController:vc animated:NO];

}

SecondViewController.m

-(void)viewDidLoad{
   self.view.opaque = YES;
   self.view.backgroundColor = [UIColor clearColor];
}

 - (IBAction) withDraw:(id)sender{
     [self.view removeWithZoomOutAnimation:2 option:nil];
    }

When I access the withDraw Function, the view of the SecondViewController is removed and firstViewController is back. However when I use the button to access the - (IBAction) btnMoveTo:(id)sender function. It doesn't work. Nothing really happens. Any suggestions or help would be greatly appreciated.

Answer 1

也许您可以尝试这样声明* vc：UIViewController * vc = [self.storyboard InstantiateViewControllerWithIdentifier：@“ Second”];

Answer 2

It worked

- (IBAction) withDraw:(id)sender{
 [self.view removeWithZoomOViewControllerutAnimation:2 option:nil];

  UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
  UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"First"];
  vc.view.backgroundColor = [UIColor clearColor];
  self.modalPresentationStyle = UIModalPresentationCurrentContext;
  [self presentModalViewController:vc animated:NO];
}

I added another instance of the firstViewController by pointing to its identifier. So it brings back FirstViewController to the top.