applications
Applications for the system to cover with a shielding view.
Declaration
var applications: Set<ApplicationToken>? { get set }Discussion
When the user launches an application in this set, the system calls your extension that customizes the shield’s appearance. When the user taps on a button the shield displays, the system calls your extension that handles user actions. If your app doesn’t provide a list of applications to shield, this value is nil. Your app can shield up to 50 application tokens at once.