How to Add a UIPageViewController to a UIStackView Inside a UIScrollView

Discover how to effectively add a `UIPageViewController` to a `UIStackView` within a `UIScrollView`, fixing common layout issues.
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This video is based on the question https://stackoverflow.com/q/69705599/ asked by the user 'Ariel Malka' ( https://stackoverflow.com/u/50335/ ) and on the answer https://stackoverflow.com/a/69709340/ provided by the user 'Ariel Malka' ( https://stackoverflow.com/u/50335/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Add a UIPageViewController to a UIStackView Inside a UIScrollView: A Step-by-Step Guide

Integrating different user interface components seamlessly can sometimes be a bit tricky, especially when dealing with complex layouts. One such scenario is adding a UIPageViewController to a UIStackView that resides within a UIScrollView. If you’re facing issues with blank spaces where your UIPageViewController should be showing, you’re not alone. Let’s dive into this problem and explore a straightforward solution!

Understanding the Problem

You may have encountered a situation where you've attempted to set up a UIPageViewController within a UIStackView that itself is inside a UIScrollView, only to find that it results in a blank area — typically due to improper initialization or constraints. Below are the symptoms of this issue:

The UIPageViewController does not display any content, appearing merely as a blank space.

Other components (e.g., view1 and view2) in the UIStackView render correctly, indicating that the issue is localized to the page view controller.

This can be frustrating, but with the right adjustments, we can resolve it.

A Solution to the Blank Space Issue

To fix the issue of the UIPageViewController not displaying content correctly, you need to ensure that it’s initialized properly and that you set the first view controller to be shown. Below is the step-by-step solution based on the original code.

Step 1: Initialize the UIPageViewController Correctly

Instead of merely instantiating the UIPageViewController, you need to pass in specific parameters that dictate the behavior of the page transitions. Here is the line you’ll need:

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Step 2: Set the Initial View Controller

Once you have created the UIPageViewController, it’s essential to specify which view controller should be displayed first. To do this, utilize the setViewControllers method, as demonstrated below:

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Putting It All Together

Here’s the revised portion of your code including these crucial changes:

[[See Video to Reveal this Text or Code Snippet]]

Final Thoughts

By following the steps outlined above, you should effectively eliminate that unwanted blank space and have your UIPageViewController displaying content as expected within your UIStackView and UIScrollView. Remember, careful handling of initialization and constraints is key to ensuring a seamless user interface experience.

If you continue to encounter issues or have further questions, feel free to ask!

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