嵌入在UIViewController容器中的UINavigationViewController

Question

I have a nav controller as one of the child view controllers to my custom view controller container. There are two view controllers acting as children - the one on the left which is grey and the one on the right which is actually a navcontroller tree loaded from a storyboard which is orange.

Shown are images a. before navigation b. after navigation to the next screen and pressing back.

Why does the location of the button change by itself like that?

Answer 1

使用IB中的容器视图控件来解决此问题。