Switching Between View Controllers Without Using Segues

Understanding View Controllers in iOS Development: Is One Enough for Multiple Views?

Understanding Objective-C Memory Management and the Dangers of Release Objects in `viewWillDisappear`: A Guide to Preventing Memory Leaks

Dealloc Not Called in Contained View Controllers: Understanding the Issue and Solutions

Here is a high-quality implementation of the code based on your specifications:

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