How do Push methods differ in closed-source and open-source applications?

The Push method in the context of iOS usually refers to navigation — adding a new controller to the navigation stack (UINavigationController).

In closed source applications, the Push method can be implemented using standard Apple APIs, without the ability to modify internal logic.

In open source applications, developers can create their own navigation implementations, extend or modify the behavior of the Push method, for example, by adding animations, transition logic, or error handling.

Thus, the difference is not in the Push method itself, but in how much control and ability to modify its implementation:

• Closed source: Uses the standard pushViewController(_:animated:) method without modifications.
• Open source: You can create custom Push methods, extend functionality, integrate with other libraries, etc.