Скачать или смотреть How to Easily Navigate Between Controllers in Swift: Mastering UINavigationController

Discover how to seamlessly navigate between screens in your Swift app using `present/dismiss` and `UINavigationController` methods for an enhanced user experience.
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This video is based on the question https://stackoverflow.com/q/62877532/ asked by the user 'bypolinafox' ( https://stackoverflow.com/u/13922883/ ) and on the answer https://stackoverflow.com/a/62879852/ provided by the user 'Kartikey' ( https://stackoverflow.com/u/1520829/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Navigating Between Controllers in Swift

When developing an app, an essential feature is ensuring that users can navigate smoothly between different screens. Whether you're creating an analog of the iPhone's Notes app or any other type of app, understanding how to manage screen transitions is crucial.

In this post, we'll address a common problem: you want to move from a list of notes to watching or editing an individual note, but you're not quite achieving the desired screen flow after saving your changes. Specifically, after creating a note and dismissing, you would prefer to see the newly created note instead of returning directly back to the list.

The Problem

Let's set the stage: you have three screens in your app:

A List of Notes screen

A Watch Note screen

An Edit/Make Note screen

Here’s what’s happening:

You navigate from the List of Notes to the Watch Note.

From the Watch Note, you navigate to the Edit/Make Note screen to create or modify a note.

Upon completion and dismissal, you find yourself back at the List of Notes instead of viewing the Watch Note with the newly created entry.

This scenario raises an important question: Should you continue using the present/dismiss method, or is it time to integrate a UINavigationController for better navigation control?

Solutions to Navigation

1. Using Present/Dismiss Method

If you prefer to stick to the present/dismiss method, here’s one approach to achieve your goal:

Communicate Between Screens:

Ensure that your List of Notes screen is aware of when the Make Note screen is dismissed. This can be achieved by passing data between the controllers or using the dismissViewControllerAnimated:completion: method.

Presenting the Watch Note Screen:

After dismissing the Make Note screen, you would then present the Watch Note screen from the List of Notes screen.

Be sure to set animated: false when presenting to avoid the visual disruption of screen transitioning animations.

2. Using UINavigationController (Highly Recommended)

Adopting a UINavigationController offers a more flexible solution, with benefits that simplify navigation immensely. Here’s why you should consider it:

Easier Navigation Management:

With a UINavigationController, you can effortlessly pop back to the desired screen using navigationController.popToViewController(). This allows you to navigate directly to your Watch Note screen after creating a new note, without any awkward transitions.

Cleaner Code and Maintenance:

Using a navigation stack simplifies your code. You won’t need to pass variables between controllers or manage state to track which screen to return to. You can easily access all the controllers in the stack with navigationController.viewControllers, which keeps your code organized and easy to manage.

Conclusion

In conclusion, while both methods allow for navigation between your controllers, utilizing UINavigationController significantly enhances your app's user experience and simplifies code maintenance. While the present/dismiss method may seem straightforward initially, adopting a navigation controller ensures that your app remains scalable and flexible as you continue to develop features.

As you experiment with these methods in Swift, consider using UINavigationController for a cleaner, more manageable solution to navigation between your app’s screens.