#import"ViewController.h"@implementationViewController
‐ (void)viewDidLoad{[superviewDidLoad];// Do any additional setup after loading the view, typically from a nib.UIButton*button=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];button.frame=CGRectMake(20,50,100,30);[buttonsetTitle:@"Test Crash"forState:UIControlStateNormal];[buttonaddTarget:selfaction:@selector(crashButtonTapped:)forControlEvents:UIControlEventTouchUpInside];[self.viewaddSubview:button];}‐(IBAction)crashButtonTapped:(id)sender{@[][1];}@end
Build and run your app in Xcode with the Xcode debugger disconnected.
Click play_arrowBuild and then
run the current scheme to build your app on a test device or
simulator.
Wait until your app is running, then click
stopStop running the scheme or
action to close the initial instance of your app. This initial
instance included the debugger that interferes with Crashlytics.
Force the test crash in order to send your app's first crash report:
Open your app from the home screen of your test device or simulator.
In your app, press the "Test Crash" button that you added using the code
above.
After your app crashes, run it again from Xcode so that your app can
send the crash report to Firebase.
If you've refreshed the console and you're still not seeing the test crash
after five minutes, try enabling debug logging (next section).
Enable debug logging for Crashlytics
If you don't see your test crash in the Crashlytics dashboard, you can
use debug logging for Crashlytics to help track down the problem.
Enable debug logging:
In Xcode, select Product > Scheme > Edit scheme.
Select Run from the left menu, then select the Arguments tab.
In the Arguments Passed on Launch section, add -FIRDebugEnabled.
Force a test crash. The first section on this page describes how to do this.
Within your logs, search for a log message from Crashlytics that
contains the following string, which verifies that your app is sending
crashes to Firebase.
Completed report submission
If you don't see this log or your test crash in the Crashlytics dashboard
of the Firebase console after five minutes, reach out to
Firebase Support with a copy of
your log output so that we can help you troubleshoot further.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-26 UTC."],[],[],null,["\u003cbr /\u003e\n\niOS+ Android Flutter Unity \n\n\u003cbr /\u003e\n\nForce a crash to test your implementation **Note:** Before forcing a crash, make sure that your app is configured to [automatically upload dSYM files](/docs/crashlytics/get-started?platform=ios#set-up-dsym-uploading).\n\n1. Add code to your app that you can use to force a test crash.\n\n You can use the following code to add a button to your app that, when\n pressed, causes a crash. The button is labeled \"Test Crash\".\n\n \u003cbr /\u003e\n\n SwiftUI \n\n ```swift\n Button(\"Crash\") {\n fatalError(\"Crash was triggered\")\n }\n ```\n\n UIKit \n\n Swift \n\n ```python\n import UIKit\n\n class ViewController: UIViewController {\n override func viewDidLoad() {\n super.viewDidLoad()\n\n // Do any additional setup after loading the view, typically from a nib.\n\n let button = UIButton(type: .roundedRect)\n button.frame = CGRect(x: 20, y: 50, width: 100, height: 30)\n button.setTitle(\"Test Crash\", for: [])\n button.addTarget(self, action: #selector(self.crashButtonTapped(_:)), for: .touchUpInside)\n view.addSubview(button)\n }\n\n @IBAction func crashButtonTapped(_ sender: AnyObject) {\n let numbers = [0]\n let _ = numbers[1]\n }\n }\n ```\n\n Objective-C \n\n ```objective-c\n #import \"ViewController.h\"\n\n @implementation ViewController\n ‐ (void)viewDidLoad {\n [super viewDidLoad];\n\n // Do any additional setup after loading the view, typically from a nib.\n\n UIButton* button = [UIButton buttonWithType:UIButtonTypeRoundedRect];\n button.frame = CGRectMake(20, 50, 100, 30);\n [button setTitle:@\"Test Crash\" forState:UIControlStateNormal];\n [button addTarget:self action:@selector(crashButtonTapped:)\n forControlEvents:UIControlEventTouchUpInside];\n [self.view addSubview:button];\n }\n\n ‐ (IBAction)crashButtonTapped:(id)sender {\n @[][1];\n }\n\n @end\n ```\n2. Build and run your app in Xcode with the Xcode debugger disconnected.\n\n | **The Xcode debugger prevents crash reports\n | from being sent to Crashlytics.** Complete the following steps to disconnect your test device or simulator from the Xcode debugger ***before*** forcing a crash.\n 1. Click play_arrow**Build and then\n run the current scheme** to build your app on a test device or\n simulator.\n\n 2. Wait until your app is running, then click\n stop**Stop running the scheme or\n action** to close the initial instance of your app. This initial\n instance included the debugger that interferes with Crashlytics.\n\n3. Force the test crash in order to send your app's first crash report:\n\n 1. Open your app from the home screen of your test device or simulator.\n\n 2. In your app, press the \"Test Crash\" button that you added using the code\n above.\n\n 3. After your app crashes, run it again from Xcode so that your app can\n send the crash report to Firebase.\n\n4. Go to the [Crashlytics dashboard](https://console.firebase.google.com/project/_/crashlytics) of the\n Firebase console to see your test crash.\n\nIf you've refreshed the console and you're still not seeing the test crash\nafter five minutes, try enabling debug logging (next section).\n\nEnable debug logging for Crashlytics\n\nIf you don't see your test crash in the Crashlytics dashboard, you can\nuse debug logging for Crashlytics to help track down the problem.\n\n1. Enable debug logging:\n\n 1. In Xcode, select **Product \\\u003e Scheme \\\u003e Edit scheme**.\n\n 2. Select **Run** from the left menu, then select the **Arguments** tab.\n\n 3. In the *Arguments Passed on Launch* section, add `-FIRDebugEnabled`.\n\n2. Force a test crash. The first section on this page describes how to do this.\n\n3. Within your logs, search for a log message from Crashlytics that\n contains the following string, which verifies that your app is sending\n crashes to Firebase.\n\n ```\n Completed report submission\n ```\n | After confirming that your app is sending crashes, you can optionally disable debug logging by removing the `-FIRDebugEnabled` from the arguments passed on launch.\n\nIf you don't see this log or your test crash in the Crashlytics dashboard\nof the Firebase console after five minutes, reach out to\n[Firebase Support](/support/troubleshooter/crashlytics/missing) with a copy of\nyour log output so that we can help you troubleshoot further.\n\nNext steps\n\n- [Customize your crash report setup](/docs/crashlytics/customize-crash-reports) by adding opt-in reporting, logs, keys, and tracking of non-fatal errors."]]