Login in
I have a tutorial about facebook login, it works fine in the simulator if you log in as a developer account.
Here developer account means you need to create an app account in developers.facebook.com and then you need to add yourself as a developer or main admin of the app, then if you try to login in from Android or iOS devices, you would be able to login.
But if you share the same apk with other friends, they won’t able to login their facebook account in the app, because they are not added as developers of the app.
You need to solve it the hard way, you must publish your app in the play store and also submit your app for review in the facebook review.
If your app pass the both verification, then your users would be able to login from their device.
App Crash Issue