rootViewController視圖屬性

Question

我有一個關於UIViewControllers的問題。如果我有一個由以下內容組成的視圖層次結構 - view2是view1的子視圖，view3是view2的子視圖。爲了讓我rootViewController.view屬性將被設置視圖層次結構

rootViewController.view = view3; 

如果什麼VIEW3和視圖2是在同一水平上。例如，view2和view3是view1的子視圖，我怎樣才能設置我的rootViewController.view？

感謝

Answer 1

NSArray *arrayOfViewControllers = self.navigationController.viewControllers; 

//now you can take last viewcontroller from array and set that controller as root view controller like below 

rootViewController.view = [arrayOfViewControllers lastObject];