Based on the provided code snippet, I will write a complete example of how to use `UIViewControllers` and a `UISplitView` together with presenting modal view controllers.

Understanding View Controller Communication in iOS: A Powerful Technique for Passing Data Between View Controllers

Troubleshooting Method Calls in iOS Development: A Step-by-Step Guide

Understanding the Basics of Developing an iOS App with a REST API Backend: A Comprehensive Guide

Understanding File Associations in Safari on iPhone: A Deep Dive into Plist Files and Bundle Documents

Understanding Universal Apps on iOS: A Deep Dive into Target Device Family

Understanding Enterprise Distribution Prompt Messages on iOS: Best Practices for a Smooth Deployment Experience

Understanding Apple's App Review Guidelines for iOS Development

Parsing CSV Files with CHCSVParser on iOS

Understanding the Challenges of Working with Auto Layout in UITableViews