How to launch another app from an iPhone app

Question

I am working on a map application in my iPhone app.

I have a button go.

When the user clicks this button in this method I want to check if user

Answer 1

Try to do this way :

NSString *wazeAppURL = @"waze://";
NSString *mapsAppURL = @"maps://";

BOOL canOpenURL = [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:wazeAppURL]];

NSString *url = canOpenURL ? wazeAppURL : mapsAppURL;
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];

Here, canOpenURL allows you to test if the Waze app is installed on your iPhone. if iPhone can open the url waze:// it means you already have the app and it will launch it. Otherwise it will launch the default Maps app. Safari won't be called.