Global Variable


URLs must be universal links and have an app configured to open them.


const UIApplicationOpenExternalURLOptionsKey UIApplicationOpenURLOptionUniversalLinksOnly;


When you include this key in the options dictionary of the openURL:options:completionHandler: method, the method opens the URL only if the URL is a valid universal link and there is an installed app capable of opening that URL. The value of this key is an NSNumber object containing a Boolean value.