在UINavigationController中推送View Controller [英] Push a View Controller in a UINavigationController

问题描述

我有一个带导航控制器的标签视图控制器。在第一个标签项中，我单击视图中的一个按钮，弹出一个带有动画的视图：YES。

I have a tab view controller with a navigation controller. In the first tab item I click on a button in a view that pops up a view with animated: YES.

然后当该视图完成后，我点击另一个关闭的按钮它。喜欢：

Then when that view is done I hit another button that dismisses it. Like:

                   [self dismissViewControllerAnimated:NO completion:^{

                        ProfilesViewController *profile = [[ProfilesViewController alloc] init];
                        [self.navigationController pushViewController:profile animated:YES];

                        //SHOW YOUR NEW VIEW CONTROLLER HERE!
                    }];

但每次运行此代码时，它都会关闭视图，不会推送配置文件控制器，并显示从第一个标签栏项目查看。

But everytime this code runs, it dismisses the view, DOES NOT push the profiles controller, and shows the view from the first tab bar item.

如何使用后退箭头将ProfilesViewController推送到屏幕？

How do I push the ProfilesViewController to the screen with a Back arrow?

推荐答案

如果您使用 dismissViewControllerAnimated 来解除这意味着VC是以模态方式呈现的。因此，它没有导航控制器（因此 self.navigationController 为零）因此无法将任何东西推入导航控制器。

If you are using dismissViewControllerAnimated to dismiss that means that the VC is presented modally. As such, it doesn't have a navigation controller (so self.navigationController is nil) and thus it can't push anything into the navigation controller.

你真的应该向控制器添加一个属性，它是一个委托或完成块，可以用来从另一个控制器（显示它的控制器）推动控制器来解除并推送控制器。

You should really add a property to the controller which is a delegate or a completion block which can be used to push the controller from another controller (the one that presents it) to dismiss and push the controller.

第二种选择是通过导航控制器，使用一个块的代码数量相似但不太好。

A second option is to pass the navigation controller, it's a similar amount of code to using a block but not so good.

一个糟糕的选择是使用 parentViewController 来查找合适的导航控制器，但这很糟糕。

A crappy option is to use the parentViewController to find the appropriate navigation controller, but that sucks for many reasons.

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