1 duplicate symbol for architecture x86_64

Question

I am not sure what I have done wrong.
I moved my project folder to another folder and copied the backup folder to desktop.
I tried to open the backup project and build

Answer 1

how to get derived data

• Open Xcode.
• Open Xcode preferences (Cmd + ,)
• Select location option.

• now you have scene, now click on the point as shown in below image.

• your derived data is now opened (suggest you to add drive data in finder left menu). Delete whatever inside the drive data.

• now delete your project from simulator.
• clean and build your project.

If you are still facing issues then let us know so that we can help accordingly.