Querying installed applications on an iPhone

Question

Is there a way to query the installed apps on an iPhone for an iPhone app? If yes how?

Answer 1

You can't look at a list of installed applications (at least for an app that meets Apple's approval) but you can test whether the phone can open certain URLs using UIApplicatoin's -canOpenURL: method:

NSURL *url = [NSURL URLWithString:@"myscheme://test"];

if ([[UIApplication sharedApplication] canOpenURL:someURL]) {
    ...
}