ios - 从当前上下文推送导航

Question

嗨，我有两个 Viewcontroller 一个 和 乙我正在介绍乙来自 的 Controller 一个 Controller 与 当前上下文 我在下面粘贴了我的编码。我想从 推送乙 Controller 到 中号 Controller ，我知道当我们展示时没有分配导航 Controller ，如果我展示带有 rootviewcontroller 的导航 Controller ，我无法获得透明的结果。

 UIStoryboard *story = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
        ChooseAddressVc *sec=[story instantiateViewControllerWithIdentifier:@"ChooseAddressVc"];
        sec.myDelegate = self;
        sec.modalPresentationStyle = UIModalPresentationOverCurrentContext;
        sec.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        [self presentViewController:sec animated:YES completion:^{

        }];

从 View Controller B 推送到 C

UIStoryboard*Story=[UIStoryboard storyboardWithName:@"Main2" bundle:nil];
    AddNewAddressVc*choose=[Story instantiateViewControllerWithIdentifier:@"AddNewAddressVc"];
    [self.navigationController pushViewController:choose animated:YES];

注意:当我呈现当前上下文时，我需要从 B Controller 推送到 C Controller 。 为了更好地理解 : 当我们需要获得透明效果时，我们无法将导航 Controller 分配为 Root View Controller

Answer 1

在你的情况下self.navigationController在 B View Controller 中为零。您需要创建 UINavigationController B View Controller 为 rootViewController .礼物创建UINavigationController从 A 而不是呈现 B View Controller ，之后您可以使用 self.navigationController在 B View Controller 中。

您的代码已编辑:

    UIStoryboard *story = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
    ChooseAddressVc *sec=[story instantiateViewControllerWithIdentifier:@"ChooseAddressVc"];
    sec.myDelegate = self;

    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:sec];
    navController.modalPresentationStyle = UIModalPresentationOverCurrentContext;
    navController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;

    [self presentViewController:navController animated:YES completion:^{

    }];