Tells the delegate that the launch process is almost done and the app is almost ready to run.
- iOS 3.0+
- tvOS 9.0+
Your singleton app object.
A dictionary indicating the reason the app was launched (if any). The contents of this dictionary may be empty in situations where the user launched the app directly. For information about the possible keys in this dictionary and how to handle them, see Launch Options Keys.
Use this method (and the corresponding
application(_: method) to complete your app’s initialization and make any final tweaks. This method is called after state restoration has occurred but before your app’s window and other UI have been presented. At some point after this method returns, the system calls another of your app delegate’s methods to move the app to the active (foreground) state or the background state.
This method represents your last chance to process any keys in the
launch dictionary. If you did not evaluate the keys in your
application(_: method, you should look at them in this method and provide an appropriate response.
Objects that are not the app delegate can access the same
launch dictionary values by observing the notification named
UIApplication and accessing the notification’s
user dictionary. That notification is sent shortly after this method returns.
The return result from this method is combined with the return result from the
application(_: method to determine if a URL should be handled. If either method returns
false, the URL is not handled. If you do not implement one of the methods, only the return value of the implemented method is considered.