iOS: Is it possible to call an external view controller, same like calling an external activity in Android?

Question

In Android, I can call an external activity (an activity in Android is similiar to a view controller in iOS), for example the "Add event" activity of the pre-installed calendar app from my app, have the user complete the external activity and return to my app to where he left of.

I need to give my user the feature to create an event in my app, but I would prefer, that he is presented with the default calendar app's "Add event" screen, instead of creating my own UI for that.

Is there a similiar mechanism in iOS?

Answer 1

Yes. Refer to Calendar and Reminders Programming Guide. The link provided takes you right to the section which talks about UIs Apple provides to make and edit events.

Answer 2

you need to now the url schemes of external applications to open them:

here is an example:

NSString *urlString= @"glassbutton://com.yourcompany.glassbutton";
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlString]];

How to use [[UIApplication sharedApplication] openURL:] open other app?