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Editorial Team
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Asked: 2026-06-04T16:17:19+00:00

(my first question here ;) I am trying to implement the functionality that you

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(my first question here 😉

I am trying to implement the functionality that you can see in mail: where there is a up en down button to load previous or next mail.

In my case I have a UITableView with around 100 entries and if you select a row, a huge empty UIScrollView is loaded. And shown at the right offset where a DetailView is loaded. In this huge scrollview (with paging enabled) each page is the size of the screen.
The DetailView contains a UIScrollview in which the content (text) and some buttons to do stuff (mail, open link in safari etc) are displayed.

I use a (DetailView *)dequeueRecycledPage method that uses an NSSet so there are max 3 UIViewControllers alive. (current, previous, next). For fast response.

The buttons in the navbar will tell the huge scrollview to “scrollRectToVisible:animated:YES” so the user sees the new view slide in.

Right now my DetailView is subclassed from UIView, and it works. But I don’t want a lot of delegation for the button actions in this DetailView. I’d rather have the DetailView handle them.
So I would like to subclass my DetailView from UIViewController.
But then we have the huge empty scrollview with 3 UIViewControllers (only 1 displayed at a time). But maybe that Apple is not keen on this, or maybe I run into trouble somehow.

So my question comes down to this:

  • Can a UIScrollView contain more than one UIViewControllers (only 1 displayed at a time)
    Or is this “not done” or simply wrong?

thanks in advance for your help,
G

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1 Answer

  1. Editorial Team

    While it is theoretically possible for one UIScrollView to contains the UIViews of 3 different UIViewControllers, it is not necessarily the best practice for what you are trying to accomplish.

    Typically, a better design would be to have your UIScrollView belong to a UIViewController and then you can add whatever UIViews (or subclasses there of) to your UIScrollView. Instead of creating 3 different UIViewControllers and adding their views to your UIScrollView, you could simply create 3 different UIViews and add those views to your UIScrollView.

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