url-scheme

If 2 other app register same url scheme, how iOS handle this? It will present an UIActionSheet view allowing the user to choose which app to launch (good example are apps that handle .doc files). That's where the icon you specify is used - on the action sheet buttons when it's shown to the user The iOS Documentation reads: Note: If more than one third-party app registers to handle the same URL scheme, there is currently no process for determining which app will be given that scheme. The OSs behaviour is undefined if there are two apps registered for an URL scheme, therefore you should try to

I am using URL scheme in my iPhone app,from a page I switch user to safari,and a button click from Web page,I am reverting back to app At that time ,some parameters are passed by the web page like myapp://parameter=1 How can I find this parameter from my app ? I have placed a break point in -(BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)ur but while revert back.it is not get called. You can use this url host to find out the parameters, where parameters could be of any kind, anything after http:// or custom tag custom:// will be caught in the following code NSString

This question already has an answer here: How to check programmatically if an App is installed? 6 answers How can I determine if a user has an iOS app installed? 4 answers On iOS, you can launch the Facebook app and link to a profile by opening a url like this: fb://profile/12345 The only problem is that if the Facebook app isn't installed, nothing happens. Is there a way to detect if the app is installed or if the url scheme fb:// is supported? This would apply broadly to other apps like Twitter as well. BOOL isInstalled = [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@