While there are many posts out there on creating iOS applications using Storyboards, most of them cover the very basics and typically focus on Swift. I wrote an article on the topic that goes in more depth by covering navigation controllers, defining more views, and defining launch screens without Storyboards. Hope you find it helpful! https://www.jviotti.com/2022/12/14/writing-objective-c-ios-apps-without-storyboards.html