ios - 如何在视图控制器时间线中跳回两步？

Question

我如何能够在视图控制器导航中跳回两步并仍然保留导航？

我有 vc1，它在触摸时移动到 vc2，然后到 vc3。例如，我将如何从 vc3 跳转到 vc1？

谢谢

Answer 1

尝试这个

    - (IBAction)back{
if(self.navigationController.viewControllers.count>2)
    [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:self.navigationController.viewControllers.count-3] animated:YES];
}

Answer 2

只是一个副本但更安全的方法......试试这样

- (void) turnBackToAnOldViewController{

    for (UIViewController *controller in self.navigationController.viewControllers) {
        if ([controller isKindOfClass:[AnOldViewController class]]) { 
        //Do not forget to import AnOldViewController.h

            [self.navigationController popToViewController:controller
                                              animated:YES];
            break;
        }
    }

}

Answer 3

你可以使用这个 -

NSArray *controllers = [self.navigationController viewControllers];
NSLog(@"%@",controllers);

在这里，您可以获得一系列控制器。

int count = [controllers count];

只需传递索引并切换到任何你想要的地方。

UIViewController *theControllerYouWant = [self.navigationController.viewControllers objectAtIndex:(count - 2)];
[self.navigationController popToViewController:theControllerYouWant animated:NO];

希望这对你有帮助。谢谢。:)

Answer 4

或者，更灵活的解决方案 - 直接使用导航堆栈。

前任。

 NSArray *viewControllers = self.navigationController.viewControllers;
 self.navigationController.topViewController = viewControllers[i];

我可以是堆栈控制器中可用的任何 vc。

Answer 5

你应该试试

NSArray *vcArray = [[self navigationController] viewControllers];
[self navigationController popToViewController:[vcArray objectAtIndex:vcArray.count-3] animated:YES];

Answer 6

请尝试这样

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY SELF.class.description == %@“,[[VC1 class]description]];
BOOL exist = [predicate evaluateWithObject:[self.navigationController viewControllers]];
if (exist) {

    for (id object in [self.navigationController viewControllers]) {

        if ([object isKindOfClass:[VC1 class]]) {

            [self.navigationController popToViewController:object animated:YES];
        }
    }
}