swift 4.2 如何在没有故事板的情况下进入主页？

Question

I have several viewcontrollers, and I want to have a work flow like below:

So MainController will create a tabbarcontroller which include A,B,C view controller. Then when user goes to B, will go to B-1, B-2 then back to MainController at the final.

How can I do with this flow? Should I use popViewController? And if so, how ?

Answer 1

您可以使用它来弹出根视图控制器

self.navigationController?.popToRootViewController(animated:  true)

Answer 2

In your case you need to work with UINavigationController .

Please check this example this example is perfect for your requirement.

Swift Example

Apple example code (Objective-C)

Update Another example

Here I am not put example code please check above links for your reference.

Answer 3

如果你不知道你的应用程序的层次结构，或者它太复杂了，这个可以让你得到你需要的UIViewController 。

let viewController = UIApplication.shared.keyWindow!.rootViewController as! YourViewController