Resolving Symbol not found Crash in SwiftUI on iOS 15 with Xcode 15.0.1

Описание: Discover why your app is crashing with `dyld "Symbol not found"` errors on iOS 15 and how upgrading Xcode can solve the issue.
---
This video is based on the question https://stackoverflow.com/q/77544313/ asked by the user 'Michael J' ( https://stackoverflow.com/u/10851991/ ) and on the answer https://stackoverflow.com/a/77609787/ provided by the user 'Michael J' ( https://stackoverflow.com/u/10851991/ ) 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: Why is my app crashing with dyld "Symbol not found" for SwiftUI or Swift symbols on iOS 15, but not on iOS 16 or iOS 17 using XCode 15.0.1?

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.
---
Why is My App Crashing with Symbol not found on iOS 15?

As developers, we strive to create seamless experiences for users across various iOS versions. However, sometimes issues arise that completely disrupt the functionality of our applications. One such problem is when an app built with Xcode crashes on iOS 15 with a dyld "Symbol not found" error—common for SwiftUI and Swift symbols. If you're facing this frustrating situation, don't worry: this post breaks down the problem and presents an effective solution.

Understanding the Problem

You've encountered a scenario where your app compiles and links correctly in Xcode 15.1 but crashes when you attempt to run it on devices or simulators operating on iOS 15.x. Below is a brief overview of what this issue entails:

Error Message: You may see messages in your console similar to:

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

Crash Dumps: These often contain references to missing symbols such as:

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

This is not just a mere annoyance; it indicates an underlying issue with your development environment—specifically, a bug in Xcode 15.0.1.

The Root Cause

The bad news: there's a known bug in the compiler within Xcode 15.0.1, which prevents applications from running correctly on iOS 15. The critical takeaway is that this issue is not a reflection of your code's quality or a need for complex refactoring. Instead, it stems from the development tools themselves.

Solution: Upgrade Your Xcode

The most straightforward and effective solution is to upgrade to Xcode 15.1. Here's how you can do this:

Open Your App Store: Launch the App Store application on your Mac.

Search for Xcode: Enter 'Xcode' in the search bar.

Update: If an update is available for Xcode, click the update button.

Recompile and Test: After the upgrade, recompile your app to ensure that the builds run smoothly on iOS 15.

Why This Works

The upgrade to Xcode 15.1 includes bug fixes that address these specific crashes, allowing your app to compile and link successfully for iOS 15 without hitting these dyld errors. Users can continue using your app across various versions without a hitch.

Conclusion

In summary, if your app is crashing on iOS 15 with the dyld "Symbol not found" error, do not panic! The issue lies within Xcode 15.0.1's bug rather than your implementation or code. Upgrading to Xcode 15.1 will resolve the issue and allow your app to function appropriately on older iOS versions.

Make sure to keep your development environment updated to minimize such disruptions in the future!