How to create .ipa file

  1. How to create .ipa file
  2. .ipa file creation process
  3. How to create iOS provisioning certificate
    4. STEP-1
1. Generating a Certificate Signing Request
2. Submitting a Certificate Signing Request for Approval
3. Approving Certificate Signing Requests
4. Downloading and Installing Development Certificates
5. Saving your Private Key and Transferring to other Systems
I think if you read all this steps on the apple documentation at the given link then you don't need to refer to any other guide.

STEP-2:
Then just you need to download your certificates and provisioning profile.

STEP-3:
Just set the profile into your Project and Target Settings and then put proper Entitlements using "Entitlements.plist".

STEP-4:
Once you have done that, just set up your project in AdHoc Scheme.

STEP-5:
Clean your Project.

STEP-6:
Go to Product -> Click on Build For -> "Build For Archiving"

STEP-7:
Product -> Archive
Now your Archive can be obtained in your Organizer where in you can save it to disk with an IPA extension and send it your client.