How to activate Firebase(Analytics) Debug View in Xcode

You can use Analytics Debug View to check your event has been stacked on properly in real-time.

But for that, you need to add a build argument.

Official Docs here

https://firebase.google.com/docs/analytics/debugview#ios

Here is Screen Capture for clumsy like me.

Do not confuse between your device and simulator. For all, you need to add this in each environment.

And if you exclude back, you have to put this.

-FIRDebugDisabled

Now, you can see a full, real-time event flow for checking whether your new event tracking is working well or not.