Returns a Boolean value indicating whether this object is the first responder.
SDKs
Framework
var isFirstResponder: Bool { get }
true if the receiver is the first responder or false if it is not.
UIKit dispatches some types of events, such as motion events, to the first responder initially.
var next: UIResponder?Returns the next responder in the responder chain, or nil if there is no next responder.
var canReturns a Boolean value indicating whether this object can become the first responder.
func becomeAsks UIKit to make this object the first responder in its window.
var canReturns a Boolean value indicating whether the receiver is willing to relinquish first-responder status.
func resignNotifies this object that it has been asked to relinquish its status as first responder in its window.