具有Storyboard的UIViewController子类的子类无法正常工作

Question

I have two view controllers, one subclass UIViewController

class MGStatusViewController: UIViewController

with storyboard identifier " MGStatusViewController ".(With some UIButton s)

And the other subclass **MGStatusViewController**

class MGStatusDetailViewController: MGStatusViewController

with storyboard identifier MGStatusDetailViewController

When i use it like this:

self.storyboard?.instantiateViewControllerWithIdentifier("MGStatusDetailViewController") as? MGStatusDetailViewController

There's no controllers(the UIButton s) from MGStatusViewController's storyboad file.

How should i achieve this? Thanks!

Answer 1

When you inherit your custom view controller - in this example MGStatusViewController you inherit code behind and logic. You can connect your outlets for MGStatusDetailViewController with MGStatusViewController . And that is it. You can't inherit UIView controls from the storyboard and expect them to show.

What you can do is to create MGStatusDetailViewController take the view from it and add it to the MGStatusViewController . Or, you can create embed control and embed MGStatusDetailViewController in MGStatusViewController . This way you will have all the controls from storyboard and will present your MGStatusDetailViewController

In short, inheritance does not take Views from storyboard, only code from that view controller.

Furthermore, when you inherit from view controllers, you use them as an abstract. You create some logic for that will be used on others view controllers, but you don't create actual UI.

Answer 2

Why you use "MGStatusDetailViewController" story board identifier if you have set identifier as "MGStatusViewController"

Storybord ID and class are diferent thing.

You may try with this -

self.storyboard?.instantiateViewControllerWithIdentifier("MGStatusViewController") as? MGStatusDetailViewController