Skip to main content

How to Collect Logs

Collecting Crash Logs and Xcode Logs for iOS Applications​

When debugging iOS application issues, both Crash Logs (from external sources like the App Store) and Xcode Logs are essential for diagnosing the root cause. Below is a guide on how to gather both types of logs.

1. Crash Logs (External Sources)​

These are crash reports submitted by users through the App Store or other crash-reporting services like Firebase Crashlytics, Sentry, or Bugsnag.

A. Crash Logs via App Store (Apple's Crash Reporting)​

  1. Accessing Crash Reports in App Store Connect:

    • Sign in to App Store Connect.
    • Navigate to "App Analytics".
    • Go to the "Crashes" section to see crash reports for your app.
    • You can filter crashes by version, device, OS, etc.
    • Download the crash logs for further analysis.
    • A detailed youtube video is here

  2. Crash Reports via Device (iTunes or Xcode):

    • If you have access to a user's device (e.g., via an enterprise deployment or after a user provides their crash logs), you can retrieve crash logs directly from the device.
    • Follow the instructions for Xcode Logs to fetch logs from a device and check for crash entries.

B. Crash Logs from Third-Party Services (e.g., Crashlytics, Sentry)​

  1. Firebase Crashlytics:

    • Firebase provides real-time crash reports.
    • Sign in to Firebase Console.
    • Navigate to Crashlytics and select your app.
    • You can view detailed crash reports, including stack traces, device details, and the number of affected users.
    • Download or export the logs to analyze further.

  2. Sentry or Bugsnag:

    • Sign in to the respective service dashboard (e.g., Sentry or Bugsnag).
    • Select your app project.
    • Access crash reports, stack traces, and event logs.
    • Download logs for deeper analysis or share them directly with the development team.

2. Xcode Logs (Real-Time & Post-Crash)​

A. Accessing Xcode Logs During App Run (Real-Time)​

  1. Connect the Device to Xcode:

    • Plug the iOS device into your Mac using a USB cable.
    • Open Xcode and select the connected device from the top toolbar.
    • Run the app via Xcode to capture real-time logs in the Xcode console.

  2. View Logs in Xcode:

    • In the Xcode Console, real-time logs related to app events, errors, and warnings will appear.
    • Use filters or search to focus on specific log levels (e.g., Error or Crash).
Last updated on