public protocol AuthorisationController
An authorisation controller is used to request a set of system permissions.
ConditionalFeature.permissionAuthorisationController(using:) you can get an instance of
a controller in your app for any conditional feature you have. You then call
start the flow.
The flow can be multi-step if your feature has multiple permissions that are not yet authorised, and the
coordinator object you pass to
ConditionalFeature.permissionAuthorisationController gives you the opportunity
to update your UI at each step, giving the user the ability to skip or cancel the process.
Call this to begin the authorisation flow. If the user tried to perform an action of the feature and you wish to automatically execute the action again at the end of the flow, if all the permissions are authorised, then supply a closure that will attempt the action again.
- param retryHandler: An optional closure that will be called at the end of the authorisation flow only if all the required permissions are now authorised.
func begin(retryHandler: (() -> Void)?)
Call this function to terminate the authorisation flow, perhaps in response to a
Cancelbutton, or a request to dismiss your view controller.