与控制器分开的视图

Question

In order to respect the MVC pattern, I would like to dissociate the view from the controller. For example

• QuestionView (inherits from UIVIew)
• QuestionViewController (inherits from UIViewController

In my controller, I set the view self.view = ...

But when I push a button in the view, it should call a method from the controller BUT the view shouldn't know its controller right ?

So how can I link the view to the controller ?

Answer 1

以编程方式将按钮目标设置为QuestionViewController的对象。

Answer 2

With iOS in most cases you can get the job done with only sub classing the controller part, and not the views. So you use the UIKit provided classes straight 'out of the box'.

It's is possible because:

• The layout: this can be stored in a Nib file and be loaded by the controller.
• responding to user events: the UIcontrols have generic callback mechanisms: delegates and actions. The 'connection' is either made in the nib file, or in the controller code.

Personally, I only subclass views when I need custom drawing.

So, the View INSTANCE obviously 'knows' its controller, but it is all done through generic interfaces, and so the view CODE is ignorant of your controller.