ios - 导航返回显示过渡期间的其他Viewcontroller

Question

我有三个Viewcontroller:ViewControllerA，ViewControllerB和ViewControllerC。

当我在 ViewControllerC 中时，我单击Navigation Back 按钮直接返回ViewControllerA，而跳过 ViewControllerB 。

我尝试了以下方法，它们都有效。但是，我想知道从ViewController C过渡到ViewController A时，它在过渡期间在一秒钟内显示了ViewControllerB。

有没有一种方法可以直接从ViewController C导航到ViewController A，从而跳过ViewControllerB。

方法1:

-(void) viewWillDisappear:(BOOL)animated {
   if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {
      NSLog(@"back button pressed");
      [self.navigationController popViewControllerAnimated:YES];
   }
  [super viewWillDisappear:animated];
}

方法2:

-(void) viewWillDisappear:(BOOL)animated {
    if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {
        NSLog(@"back button pressed");
        //[self.navigationController popViewControllerAnimated:YES];
        NSMutableArray *allViewControllers = [NSMutableArray arrayWithArray:[self.navigationController viewControllers]];
        for (UIViewController *aViewController in allViewControllers) {
            if ([aViewController isKindOfClass:[ViewControllerA class]]) {
                [self.navigationController popToViewController:aViewController animated:NO];
            }
        }
    }
    [super viewWillDisappear:animated];
}

Answer 1

您需要使用setViewControllers方法，并仅传递作为navigationController.viewControllers数组中第一个元素的viewControllerA

代码

- (IBAction)backAction:(id)sender {
    UIViewController * viewControllerA = [self.navigationController.viewControllers firstObject]; //we get the first viewController here
    [self.navigationController setViewControllers:@[viewControllerA] animated:YES];
}

类似的答案在这里 How to start from a non-initial NavigationController scene但很快