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Learn how to effectively dismiss a ViewController from within a UITableViewCell in Swift, using the delegate pattern.
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This video is based on the question https://stackoverflow.com/q/65984670/ asked by the user 'Ing. Ron' ( https://stackoverflow.com/u/3175421/ ) and on the answer https://stackoverflow.com/a/65984836/ provided by the user 'Henry Ouang' ( https://stackoverflow.com/u/14089879/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Dismissing UIViewController from a UITableViewCell: A Swift Guide

One common requirement for anyone working with iOS development in Swift is the need to dismiss a UIViewController from within a UITableViewCell. While this may seem straightforward, many developers encounter errors such as "Value of type 'TableViewCell' has no member 'dismiss'." This guide will guide you through a clean and effective way to achieve this by employing the delegate pattern.

Understanding the Problem

When you're dealing with a UITableView, your cells are often acting independently, making it challenging to communicate back to the parent UIViewController. This is where the issue arises: your TableViewCell lacks direct access to the dismissal method of its parent view controller. Fortunately, we'll leverage the concept of delegation to overcome this obstacle.

Proposed Solution

Step 1: Creating a Delegate Protocol

First, we'll define a delegate protocol in our TableViewCell that will allow communication with the containing UIViewController.

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Step 2: Setting up the TableViewCell

In your custom TableViewCell class, add a property for the delegate.

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Step 3: Assigning the Delegate in the Table View

In your table view delegate method, specifically in the cellForRowAt method, you can set the delegate property of each cell to the view controller itself.

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Step 4: Implementing the Delegate in Your UIViewController

To respond to the delegate method, your UIViewController must conform to the TableViewDismissDelegate protocol and implement the required method.

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Step 5: Triggering the Dismissal

Finally, you’ll need to trigger the dismissViewController() method from within your TableViewCell when a certain event occurs (like a button tap). Here's an example of how to do it:

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Conclusion

By using the delegate pattern, you can effectively dismiss a UIViewController from a UITableViewCell. This approach emphasizes clean architecture by keeping your view layers separated while allowing communication between them. It enhances the maintainability of your code and keeps your app structured and organized.

Now that you understand how to implement this functionality, you can modify your table view cells to interact more deeply with their parent view controllers! Happy coding!