CODEWITHSUNDEEP
iosswiftuipageviewcontroller
sinner
sinner

Reputation: 513

UIPageViewController viewControllers always return a single controller

I have two view controllers inside a UIPageViewController. I need to get all view controllers inside the UIPageViewController to call methods inside them, but it always returns a single page only (either the first page or the second page).

The code is below for convenience:

if let viewControllers: [UIViewController] = self.viewControllers {

   print(viewControllers)

   for controller in viewControllers {
       if let firstController: FirstViewController = controller as? FirstViewController {
          //Call something
       }
       if let secondController: SecondViewController = controller as? SecondViewController {
           //Call something
        }
    }
}

In fact, it returns only the visible view controller inside the page controller.

Upvotes: 1

Views: 615

Answers (1)

glyvox
glyvox

Reputation: 58049

This is intended behaviour.

In a simple UIPageViewController, this array will only return the currently visible view controller(s), which is usually just one view controller.

Keep in mind that UIPageViewController heavily caches and reuses controllers, just like a UITableViewController would. You may want to reflect changes in another way.

Upvotes: 2

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