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 the Navigation Flow in iOS Apps: A Simplified Approach Using Navigation Controllers

Maintaining the Persistent State of MPMoviePlayerViewController in iOS Applications

Understanding Dynamic Typing in iOS Development: A Deep Dive into Objective-C

Understanding View Controller Removal in iOS: Best Practices for Proper Deallocation

Understanding iOS Orientation Support for Seamless User Experience

Creating Custom Views with Programmatically Drawn Labels and Buttons: A Comprehensive Guide to Building Engaging iOS User Interfaces