Well I am trying to upload my first app in IOS.
I have done these steps correctly.
1 – I verified that my new app is in “Waiting for Upload” state.
2 – I have download and double click on the WWDR intermediate certificate. Verified that this exist in my key chains.
3 – I verified that my distribution certificatate is not expired. It’s expiration date is a year from today. Its status is “Issued”
4 – I have created app id. I verified that the app name space portion is exactly the same as my application name space. The states that this app is in are: – push notification: configurable (yellow) – in app purchase: enable (green) (i want to turn this off, but there’s no way to) – game center: enable (green) (i want to turn this off, but there’s now way to) – iCloud: configurable (yellow)
5 – I have verified that my distribution provision is “Active” for the correct application id.
6 – i have downloaded and installed and installed all 3 where they belong: a – WWDR intermediate certificate b – Distribution certificate c – Distribution provisioning profile
i declared my app id in ios provisioning portal to be com.mycompany.app but it added a number in front of it. so in the certificate I do see something like this: QWER1234.com.mycompany.app
Now in Xcode 4.5 I am searching for code signing in build settings for project and I do set it at my certificate.
But for the target, If I search for code signing in build settings, i do not find anything. Not that I do not assign the correct certificate, I just cannot find anything.
You can see it in the image below:

Have you tried switching from “Basic” to “All” when you view the build settings? I think that when set to “Basic” you will not see the code signing options. You can see the setting on the left side of your screenshot.