Скачать или смотреть Solving canGoForward Issues in WKWebView: A Swift 5 Guide

Learn how to fix the `canGoForward` always returning false in WKWebView using Swift 5! Discover effective methods to enable your forward button seamlessly.
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This video is based on the question https://stackoverflow.com/q/68903036/ asked by the user 'Yogesh Patel' ( https://stackoverflow.com/u/8201581/ ) and on the answer https://stackoverflow.com/a/68903518/ provided by the user 'RTXGamer' ( https://stackoverflow.com/u/6576315/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting canGoForward in WKWebView with Swift 5

If you're a developer working with Swift 5 and WKWebView, you may encounter a frustrating issue where the canGoForward method consistently returns false. This can be problematic, especially when you want to enable the forward button based on the web view's navigation history. In this post, we'll discuss the issue and provide a clear solution to help ensure your canGoForward logic works as intended.

Understanding the Issue

The WKWebView class in iOS allows developers to embed web content within their applications. While implementing this component, many developers have noticed that the canGoForward property does not update as expected. This can lead to difficulties in user navigation, particularly when users want to move forward in their browsing history.

Symptoms of the Problem

The back button updates correctly with canGoBack, but the forward button remains disabled.

Even when there are valid forward URLs in history, users cannot navigate forward.

A Step-by-Step Solution

To address this issue effectively, follow these organized steps that focus on observing the changes in the WKWebView properties using Key-Value Observing (KVO).

1. Set Up KVO for canGoBack and canGoForward

Adding observers to monitor changes in the canGoBack and canGoForward allows your application to react dynamically as the web view loads different pages. Here's how to set them up in your code:

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2. Implement the observeValue Method

You will need to implement the observeValue method to handle the changes observed. Include logic to enable or disable the navigation buttons based on the updated properties:

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3. Enable Back and Forward Navigation Gestures

It’s also helpful to allow back and forward navigation gestures. Enabling this feature will provide a better user experience:

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4. Clean Up with Deinit

Don’t forget to remove the observers when they are no longer needed. This is essential for avoiding memory leaks:

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Conclusion

By implementing KVO to observe canGoBack and canGoForward, you can effectively manage the navigation buttons’ state in your WKWebView implementation. This method ensures smoother user navigation while using your app, enhancing overall user experience. Make sure to follow the steps outlined above to resolve any issues with canGoForward always returning false in your Swift 5 applications.

With these adjustments, your forward button should now function as expected, providing a seamless navigation experience for your users. Happy coding!