Certificates, App ID and Provisioning Profile
问题 For submitting an iPhone app to the App Store, we need to create Certificates, App ID and Provisioning Profile. I often get confused whith these things (even after reading the Apple documentation on http://developer.apple.com/library/ios/#documentation/ToolsLanguages/Conceptual/DevPortalGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40011159-CH1-SW1) So could someone please explain me these things in simple terms. Can the same certificate be used for multiple apps (and both for