create .ipa file to upload app to appstore with Application Loader
If you want to upload .ipa file to itunesconnect without integrating developer account in Xcode and you want to use application loader. then you can generate .ipa with iTunes .
Step 1 :- Select device inplace of simulator.
Step 2 :- Go to Product -> select Archive
Step 3 :- After complited process right click to your Archive -> and select show in Finder
Step 4 :- when you click on show in finder you will redirect to Archive folder, looks like this
Step 5 :- Right click on .xarchive file -> select Show in finder option.
Step 6 :- Go to Product Folder -> Application Folder -> You will find yourprojectname.app
Step 7 :- Now to convert .app to .ipa just drag and drop into itunes . check below image ,
Step 8 :- Now put this .ipa file in safe place and use when upload with application loader .
Note :- if you want to know how to upload app with application loader then check this ,
WARNING :- Don't make .ipa with changing extension from .aap to .zip and .zip to .ipa.
I have seen in many answer that , they have suggest compress .app file and then change the extension from .zip to .ipa . It is not working now . By this method you will get Error like ,
IPA is invalid, it does not include a payload directory.