What is an outlet in Swift?

Outlets are references to storyboard/xib-based UI elements inside your view controller. Actions are functions that are triggered by certain events relating to your UI elements. A UI element can have both an outlet and an action.Click to see full answer. Just so, what is outlet and action in IOS?Outlet and Action connections are direct ways that a UIViewController can communicate with its UView. This means the outlet created in the View Controller is declared as a @property, and an action is created by declaring a method.Additionally, how do I add an outlet in Xcode? Pick the control in your user interface for which you want to create an outlet or action method. Hold down the Control key and drag (or right-click-and-drag) from the control in question over into your class @interface . Let the mouse button go when Xcode indicates a successful drag with a horizontal line. Thereof, why outlets are weak Swift? Because the outlet is declared weak, it is automatically set to nil when it’s deallocated. Because the outlet is an implicitly unwrapped optional, it has no value, that is, is equal to nil , and the application would crash as a result. If this happens, chances are you’re doing something you shouldn’t be doing.What is IBOutlet?IBOutlet is a keyword which is added to a variable declaration. It’s an indicator. It does not affect the declaration in any way. However, when the Interface Builder sees it, it will allows a programmer to set this variable through the “outlet” mechanism inside Interface Builder.