Custom action When Pressing 'back button' on a UINavigationController

Question

I am using story boards to create my app, and I have a navigation controller which navigated back and forth between pages. Now when it goes back to a page (eg when the user taps the back button), I need the page which the user is going back to to refresh (or in another words to do the viewDidiLoad method again). Is there a way to configure the Navigation controller to the that? is there a way to call a method (ANY method - I don't car if it's a special method I have to create just for that purpose) when the 'back' button on the navigation controller is taped?

Thank you for your support!! Any help is very much appreciated =]

Answer 1

您可以在viewWillAppear或viewDidAppear执行操作，但通常最好使用自定义@protocol和委托模式在2个视图控制器之间进行通信。