Скачать или смотреть Debugging Issues in Xcode: How to Enable Breakpoints and Console Logs in Multiple ViewControllers

Discover how to troubleshoot and enable debugging in Xcode when breakpoints and console logs aren't working across multiple ViewControllers.
---
This video is based on the question https://stackoverflow.com/q/67859832/ asked by the user 'Ae Ri' ( https://stackoverflow.com/u/11913288/ ) and on the answer https://stackoverflow.com/a/67859922/ provided by the user 'Menaim' ( https://stackoverflow.com/u/14437411/ ) 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: Xcode debugger enable on on files

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.
---
Debugging Issues in Xcode: How to Enable Breakpoints and Console Logs in Multiple ViewControllers

When working on an iOS project in Xcode, encountering issues with the debugger and breakpoints can be frustrating, especially when you're using multiple ViewController files. A common problem developers face is that breakpoints set in non-initial ViewController files do not seem to activate, and print statements only work for the initial ViewController. So, what causes this issue, and how can you resolve it? Let’s dive into the possible reasons and solutions.

The Problem: Breakpoints and Print Statements Not Working

Imagine you have a project with several ViewController files, but you find that when you set a breakpoint in any ViewController other than the initial one, it simply doesn’t work. Additionally, print statements executed outside of the initial ViewController do not appear in the console, even when the app is not being debugged. This raises some important questions:

Why aren’t breakpoints triggering in certain view controllers?

What can be done to ensure that print statements are visible in the console?

Understanding the Cause

The primary reason why breakpoints and print statements do not work in certain ViewController files is often related to whether the code within those controllers is actually running. Here are some key points to consider:

Navigation Logic:

If you have multiple view controllers (e.g., viewController1 and viewController2), and you're trying to set a breakpoint in viewController2, you need to ensure that the navigation function leading to viewController2 is called. If it's not triggered, the breakpoint won't activate.

Execution Flow:

Check the flow of your application. If the functions leading up to a certain ViewController are not executed (due to certain conditions or logic), then any breakpoints or print statements will not be reached.

Project Structure:

Ensure that your view controllers are correctly instantiated and presented in your app. Issues can arise if the view controller is not properly added to the view hierarchy, preventing any code within it from running.

Solutions: Enabling Debugging Effectively

To resolve these issues and enable debugging properly across multiple ViewControllers, follow these solutions:

1. Verify Navigation Logic

Ensure that the function responsible for transitioning to your target ViewController is being called. This means checking the following:

Are there any conditions preventing the function from being executed?

Is the navigation implemented correctly (e.g., using present, pushViewController, or using segues)?

2. Test Breakpoints on Reachable Code

Place breakpoints in functions that you can confirm are being called. This will help you determine if the navigation logic is sound.

Utilize the viewDidLoad, viewWillAppear, or viewDidAppear methods of ViewController as ideal places for breakpoints to ensure they are activated when the view appears.

3. Confirm Print Statements

Place print statements in the lifecycle methods (viewDidLoad, viewWillAppear, etc.) of each ViewController to ensure you are receiving console output.

Review your logic to ensure that segments where you place print statements are reachable and clearly defined within the application flow.

4. Check Xcode Settings

Ensure your Xcode project settings are configured correctly:

Confirm that debugging is enabled for your build configuration.

Make sure you are not running in a way that bypasses debug settings, such as using a Release build instead of a Debug build.

Conclusion

Understanding the flow of your application and ensuring that your functions are reachable is key to successfully using the debugger in Xcode. By implementing the strategies outlined abov