Скачать или смотреть How to Implement Back Button Functionality in TableViewControllers in Swift

Learn how to easily perform back navigation in TableViewControllers in iOS by leveraging the `didSelectRowAt indexPath` method in Swift.
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This video is based on the question https://stackoverflow.com/q/68424411/ asked by the user 'Slava Chu' ( https://stackoverflow.com/u/12244827/ ) and on the answer https://stackoverflow.com/a/68424679/ provided by the user 'Ponnie Rohith' ( https://stackoverflow.com/u/6060766/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Navigating Back in iOS TableViews: A Simple Solution

When developing iOS applications, particularly those that rely on multiple TableViewControllers, developers often encounter the need to navigate back to the previous screen programmatically. Imagine you have a TableView filled with data, and tapping on a cell takes you to a second TableViewController. Now, you want to tap on a cell in the second table and return back with the same animation as the navigation back button. This guide will outline how to accomplish this in Swift.

The Problem Explained

You have two TableViewControllers connected via a segue. Your first controller has prototype cells, and upon tapping a button inside one of these cells, you segue to the second controller. However, once you're in the second controller, tapping on a cell does not redirect you back properly.

Your attempts to use the dismiss method only return you to the root of the navigation stack, which isn't what you want – you need the action to resemble tapping the back button using the navigation controller.

The Solution: Using popViewController

To achieve your desired behavior, you should replace the dismiss action with a popViewController. This method specifically returns you to the previous view controller in the navigation stack while maintaining the intended animation. Here’s how to implement it:

Steps to Implement popViewController

Locate the didSelectRowAt indexPath Function: This function is where you'll specify the action to take when a cell is selected in your second TableViewController.

Use popViewController Method: Update your function to include the popViewController method. Here's a simple code snippet you can use:

[[See Video to Reveal this Text or Code Snippet]]

Why Use popViewController?

Animation: By using popViewController, you will get the native back button animation, which is smooth and consistent, enhancing user experience.

Navigation Stack Maintenance: This method keeps the navigation stack intact, which means when you return, it preserves the state of the first TableViewController.

Additional Considerations

No Need for Dismiss: If you are working within a UINavigationController, calling dismiss is unnecessary and often leads to unexpected behaviors. Stick with popViewController for optimal results.

State Management: Ensure that any data you need to keep track of in the first controller persists; popViewController does not alter the state of your previous controllers—it simply retracts to the previous view.

Conclusion

Navigating back to a previous TableViewController can be effortlessly handled in Swift by utilizing the popViewController method from the UINavigationController. By following the simple steps outlined above, you’ll ensure your app offers a seamless transition between screens, providing users with an intuitive experience.

Now you can enhance your application's navigation by implementing these straightforward techniques, making the user interaction fluid and more engaging!