Troubleshooting webView didFinish Navigation Issues in Swift

Описание: Learn how to fix the `webView didFinish Navigation` not working issue in your iOS app with Swift, including enabling activity indicators effectively!
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This video is based on the question https://stackoverflow.com/q/66194900/ asked by the user 'Hatem Alshehri' ( https://stackoverflow.com/u/6071452/ ) and on the answer https://stackoverflow.com/a/66194949/ provided by the user 'Shehata Gamal' ( https://stackoverflow.com/u/5820010/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting webView didFinish Navigation Issues in Swift

If you're a beginner in Swift and you've been facing challenges with your WebView not functioning as expected, you're not alone. Many developers encounter issues with the webView didFinish Navigation not being triggered, which can lead to activity indicators not stopping when content has finished loading. In this guide, we’ll explore the problem and how to properly solve it.

Understanding the Issue

In your case, you want to display an activity indicator while the web content is loading and hide it when the loading is complete. From your provided code snippet, it seems you are trying to implement this functionality using WKWebView. However, you're encountering a crash related to the navigation delegate, specifically when you set navigationDelegate to self. This suggests that you might be using the wrong type of WebView.

Common Cause of the Problem

One of the main issues is that you might inadvertently be using UIWebView instead of WKWebView. While both serve similar purposes, UIWebView does not support the WKNavigationDelegate, which leads to the error you’re facing.

Solution Steps

To resolve the issue, you can follow these steps:

Ensure You're Using WKWebView:

Go to your Interface Builder (IB) in Xcode, and confirm that you've dragged a WKWebView onto your interface and not a UIWebView. WKWebView is designed to replace UIWebView, and it is essential for using the navigation delegate feature.

Properly Connect the Outlets:

Ensure that your webView outlet is correctly connected to the WKWebView in your storyboard or XIB file. This can be reviewed in the Connections Inspector in Xcode.

Implement Delegate Methods:

Ensure your view controller conforms to the WKNavigationDelegate protocol and properly implements the delegate methods. Your existing implementation for didFinish and didFail looks good, but if the outlets aren't set correctly, those methods won't be called.

Revised Code

Here’s a cleaned-up version of your original code with key points highlighted:

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

Conclusion

By ensuring that you’re using WKWebView and properly setting up your outlets and delegate, you should be able to resolve the issue with your webView didFinish Navigation. With this knowledge in hand, you can enhance your iOS apps' user experience by effectively managing loading indicators.

If you encounter further issues, don't hesitate to reach out to the community or consult Apple's documentation for WKWebView. Happy coding!