fix: ios crash camera permissions

[asabri97]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Fixes critical camera-related crashes on iOS and Android and improves camera restart behavior across app navigation 🔧📷✅

📊 Key Changes

• 🧯 iOS crash fix when camera permission is denied/not granted
  • Added explicit camera authorization checks before camera setup (AVCaptureDevice.authorizationStatus).
  • Removed fatalError and replaced try! with safe do-catch + early returns to avoid hard crashes when no camera/input is available.
  • Hardened camera switching and zoom with nil checks and better failure handling/logging.
• 🧵 Android crash fix: race condition when disposing YOLOView during inference
  • Introduced a @Volatile isStopped flag and checked it at multiple points in onFrame to avoid using closed resources after stop().
  • Made predictor shutdown safer with guarded close() handling.
• 🔄 Improved camera restart/resume behavior on Android + Flutter example
  • Reordered initialization to set lifecycle owner before camera startup; camera starts only when permissions are granted.
  • Added a new platform method restartCamera and a Dart API YOLOViewController.restartCamera().
  • Example app forces a rebuild when navigating back to the camera screen to ensure the camera view restarts reliably.
• 📦 Version bump + notes
  • Updated package version to 0.1.45 and documented fixes in CHANGELOG.md.

🎯 Purpose & Impact

• 🚫➡️✅ Prevents fatal iOS crashes when users deny camera permission or when a camera device/input can’t be created, improving stability and user experience.
• 🛑⚙️ Eliminates Android SIGSEGV/teardown crashes caused by inference callbacks running after resources are stopped/closed.
• 🔁📱 More reliable camera recovery when returning to a camera screen or restarting the camera, reducing “black preview” / “camera won’t start” edge cases.
• 🧩🧑‍💻 Better integration options for app developers via the new restartCamera() hook for manual recovery flows when needed.

[UltralyticsAssistant]

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[UltralyticsAssistant]

🔍 PR Review

_{Made with ❤️ by Ultralytics Actions}

Solid crash-hardening overall: iOS permission/device nil handling looks correct and Android’s isStopped gating meaningfully reduces dispose/onFrame races. Main issue: the new restartCamera hook bypasses the existing permission/lifecycle guards by calling startCamera() directly; routing it through initCamera() (and/or adding precondition guards inside startCamera()) would make the fix robust. Example app rebuild trigger is likely effective but may introduce an extra initial rebuild.

💬 Posted 3 inline comments

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
lib/widgets/yolo_controller.dart	0.00%	4 Missing ⚠️
lib/core/yolo_inference.dart	0.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[UltralyticsAssistant]

Merged—huge thanks @asabri97 (and @onuralpszr for the contributions) for landing this stability-focused upgrade in the Flutter app.

“It is not the strongest of the species that survives… but the one most responsive to change.” — Charles Darwin

This PR is a great example of that mindset: proactively hardening camera flows across iOS and Android, removing crash paths (permission-denied, missing inputs, teardown races), and adding a practical restartCamera() hook that makes real-world navigation/recovery scenarios far more reliable. The 0.1.45 bump + clear changelog notes are the perfect finishing touch.

Appreciate the care, testing, and polish here—this will save developers (and users) a lot of frustration.