it isn't a true answer. it's my fault.

Yes, but I didn't find it

In info plist file

key>NSCameraUsageDescription We need access to your camera for make Profile Photo</string

NSUserTrackingUsageDescription Please allow so we can serve you personalized ads I am using Firebase Crashytics. And I didn't do anything if the user didn't allow to track

Hi, Claude31. Thank you for your response :) Imagine I have a collection view and it will be reusable. I'll use it in featured posts, the latest posts ... and more. One choice is creating tableView and inside create a collection view inside its cell Another choice is creating collection views another controller and adding it under the tableView (i imagine there will be a different UI ... tableView and inside reusable collection views reusable collection view without tableview's another cell ) I Hope, I was explained my imagination. the reason I do this because collection view gets its content from different API and different keys