There is a known issue in 4.7.1 for iOS that is making packaging no longer work properly. We have found a work-around and wanted to get it up ASAP while we work to fix the problem. We have a hotfix on the way and expect it to be ready by the end of the week.
UE-11207 iOS launch fail after upgrading to 4.7.1, provision not found, signing key not found
Symptom: When attempting to utilize Launch On or File|Package, the editor doesn’t allow their use because it doesn’t find a valid provision or certificate even though the Provision List in the IOS Project Settings shows a valid provision.
Problem: In 4.7 we introduced automatic generation of the Info.plist file so users wouldn’t have to keep updating the plist and instead could remain in the editor to set their iOS settings. The generation of this file is not happening before we do the validation check and so the validation utilizes an incorrect Bundle Identifier when attempting to determine if the provision and certificate are valid.
Work Around: The simplest way to get around this issue is to utilize a Wild Card provision.
1) To do this, on the Apple Developer site (developer.apple.com) log in to the Member Center.
2) Select Manage your certificates and create a new App ID (something like MyTeam).
3) Select Wildcard App ID and specify the Bundle ID as * (asterisk). This will make an App ID that will match any Bundle Identifier you may set in the Unreal Editor.
4) Finish the App ID process (as shown in the IOS Quick Start developer documentation).
5) Then, select All under the Provisioning Profiles section on the developer site.
6) Create a new iOS App Development Provisioning Profile utilizing the MyTeam App ID you created previously.
7) Download and import this new provision via the IOS Project Settings in the Unreal Editor.
You will now be able to utilize Launch On and File|Package again. Further, this will then properly generate the plist with the Bundle Identifier you have specified in the settings, and so it will then utilize your specific provision for the game in the future.