Monitoring app launches on an iOS device

While I'm no expert on iOS development, I have read through the API docs on Apple's developer site and I can't find an开发者_StackOverflow社区ything on this. Before I presume that it's impossible let me ask here: Can I somehow monitor application launches on a standard iOS device? By "standard" I mean not jailbroken and using only public iOS v4 APIs. Any insight is appreciated. Thanks.

No, there's no access to system-level stuff like that at all. The somewhat-small sandbox makes certain types of apps impossible, but does provide a lot of protection for the user.