Swift: Natively Detect if App has Crashed

Question

I have searched around, but have yet to find an answer that doesn\'t direct me towards a 3rd party service. I do not need anything intricate, just to save a value in N

Answer 1

FirebaseCrashlytics

If you don't use Fabric because it is deprecated, You need to use following code in your ViewController that was mentioned in Updagte to the Firebase Crashlytics SDK.

I use it like this:

// 1. import Crashlytics
import FirebaseCrashlytics

class YOUR_ROOT_VIEW_CONTROLLER {

   override viewDidLoad(){
       //...

       // 2. register to get the notifications
       self.configCrashlytics()

       // ...
   }

    func configCrashlytics() {
        /* You must set setCrashlyticsCollectionEnabled to false in order to use
        checkForUnsentReportsWithCompletion. */

        Crashlytics.crashlytics().setCrashlyticsCollectionEnabled(false)

        Crashlytics.crashlytics().checkForUnsentReports { hasUnsentReport in
          let hasUserConsent = false
          // ...get user consent.

          if hasUserConsent && hasUnsentReport {
            Crashlytics.crashlytics().sendUnsentReports()
          } else {
            Crashlytics.crashlytics().deleteUnsentReports()
          }
        }

        // Detect when a crash happens during your app's last run.
        if Crashlytics.crashlytics().didCrashDuringPreviousExecution() {
          // ...notify the user.
            DispatchQueue.main.async {
                let alert = Utils.shared.errorAlert(title: "Sorry!", message: "This App was crashed during last run")
                self.present(alert, animated: true, completion: nil)
            }
        }
        
    }
    // 4. Add a button that run fatallError()
    @IBAction func crashApp(_ sender: UIButton) {
        fatalError()
    }
}