Permission issue for custom fonts folder.

[Nahiduzzaman]

I am building a nativescript-angular app for IOS,
I am implementing custom fonts, and followed this blog https://nativescript.org/blog/using-custom-fonts-in-a-nativescript-app/
Everything works perfect when i run 'tns run ios'
But when i prepare build using Xcode in a real device.
I got error "You don’t have permission to save the file “fonts” in the folder <APP_NAME>"