Effectively Close Keyboard with UIViewRepresentable in SwiftUI

Learn to implement keyboard dismissal in a SwiftUI application using `UIViewRepresentable`. This guide provides a clear solution to close the keyboard upon tapping outside or pressing a button.
---
This video is based on the question https://stackoverflow.com/q/67796504/ asked by the user 'devOP1' ( https://stackoverflow.com/u/13702200/ ) and on the answer https://stackoverflow.com/a/67803789/ provided by the user 'Warren Burton' ( https://stackoverflow.com/u/408390/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to endEditing on UIViewRepresentable in SwiftUI?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to End Editing on UIViewRepresentable in SwiftUI

As developers, we often encounter challenges related to user interface elements, particularly when integrating UIKit components with SwiftUI. One common issue is managing the keyboard in a SwiftUI view, specifically related to a UIViewRepresentable like a custom payment card text field. This post will guide you through enabling keyboard dismissal in your SwiftUI app when a user taps outside the field or presses a button.

The Problem

When working with user input fields, such as a textField, it’s essential to provide a smooth experience. Users often expect that tapping outside the keyboard or pressing a button will dismiss it. However, managing the keyboard in SwiftUI, especially when using UIKit components, requires specific approaches that aren't immediately straightforward.

You have likely created a custom UIViewRepresentable, like this:

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

While this structure serves as a good starting point, the keyboard handling aspect is missing. Your goal is to easily dismiss the keyboard when users interact outside the text field or hit a designated button.

The Solution

Implementing the endEditing Functionality

To effectively manage keyboard dismissal, we can extend the View protocol in SwiftUI. This will allow you to create a utility method that can terminate editing in any active view. Here’s how to implement this functionality:

Create the Extension

Start by defining a static function that will call endEditing on all windows in your app:

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

This code snippet utilizes UIApplication.shared.windows to access all windows and dismiss the keyboard without needing references to specific text fields.

Making the Call

To utilize this new method, invoke CustomSTPPaymentCardTextField.endEditing() whenever a tap occurs outside the text field or if a button is pressed. Here’s an example implementation:

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

Handling Multi-Scene Applications

If your application incorporates multiple scenes, the provided solution might require additional adaptations, as it uses the UIApplication shared instance. Keep this in mind while developing larger applications where multiple windows may coexist.

Conclusion

Managing keyboard dismissal within SwiftUI components that rely on UIKit can be a bit of a puzzle, but with the right techniques, you can create a seamless user experience. By introducing a simple utility function via a View extension, you enable users to dismiss their keyboards effortlessly.

Feel free to explore this method in your applications and enhance the usability of your SwiftUI interfaces! Have questions or additional tips? Share them in the comments below!