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问题:

Why is it that when I build an application, Xcode creates a debug build? I want to create a release build. How can I do this?

回答1:

It is done over building an Archive version.

回答2:

Product / Scheme / Edit Scheme..

And from the menu that comes up, select Release under "Build Configuration".

回答3:

Xcode 8 and 9

I found this question because I had already finished debugging my app and I wanted to make a release build for the app store. I always forget which menu item to use, though. This answer is a reminder to me and others next time.

Choose the Generic iOS Device from the active scheme menu.

Then go to Product > Archive.

You may have to wait a little while for Xcode to finish archiving your project. After that you will be shown a dialog with your archived project. You can select Upload to the App Store... and follow the prompts.

More Help

This answer is for those who are already all signed up with a developer account and just need to get the archive from Xcode to iTunes Connect. If you need more help signing up for a developer account and getting an app to the app store, read the following links.

How to Submit An App to Apple: From No Account to App Store – Part 1
How to Submit An App to Apple: From No Account to App Store – Part 2
App Distribution Guide (Apple Docs)
Submitting Your App to the Store (Apple Docs)

回答4:

To create a release build, you have to edit your current scheme (⌘<) and highlight "Run [name of application]. On the right, select "Build Configuration" and choose "Release". Build as usual.