canOpenURL - check if phone has apps installed.

gistfile1.m

/*

canOpenURL
	
Clear App ( http://www.realmacsoftware.com/clear/ ) checks if app exsits,
then unlocks a theme based on that app. In Clear, they check if you have 
Tweetbot.

Example Usage:
BOOL hasTweetbotInstalled = [self checkIfPhoneCanOpenAppUrlScheme:@"tweetbot://"];
BOOL hasFacebookInstalled = [self checkIfPhoneCanOpenAppUrlScheme:@"fb://"];
BOOL hasInstacastInstalled = [self checkIfPhoneCanOpenAppUrlScheme:@"pcast://"];

Custom URL Schemes of apps:
http://handleopenurl.com/


*/

-(BOOL) checkIfPhoneCanOpenAppUrlScheme:(NSString *) aCustomURLScheme
{
    NSURL *url = [NSURL URLWithString: aCustomURLScheme];
    return [[UIApplication sharedApplication] canOpenURL: url];
}