how build unity to .ipa?

please help me im using iphone 4. thanks for your concern and more power!

Once you have built the project from Unity to XCode via the build settings menu you can use Product>>Archive in XCode to make an archive. Then it should open the Archives tab of Organizer, if it doesn’t you can do that manually. Then just select the archive and click “Share” and you’ll be able to select IPA file from that dialog and make it. That’s it.

pdf link follow this pdf you will get your answer

and once you have created the xcode build and everything is set

product → Archive