Swift uses the final keyword to prevent rewriting of _swift

The final keyword exists in most programming languages, indicating that the content it modifies is not allowed to be inherited or restarted. In Swift, the final keyword can be decorated before class, Func, and var.

In general, it is thought that using final can better control the code, perform better performance, and make the code more secure. Here's an example code to introduce Swift's final keyword to prevent rewriting.

 /** uses the final keyword to prevent the rewriting of final, final, final, definitive, and irrevocable final modifier classes, indicating that the class cannot be inherited.
   If you decorate a property or method, it means that the corresponding property or method cannot be overridden. */class Observer {//final plus var storeproperty:int = 0 {willset {print ("Storeproperty father'll S ET ")} didset {print (" Storeproperty father did Set ")}//Final//failed to set property observer var COM for computed properties
    Puteproperty:int {get {0} set {print (' do nothing! ') }//final func dodododtest ()-> Void {print ("Dadadadadaddadaad")} class Childofobserver:obse
    RVer {//can override variable storage properties in parent class override Var Storeproperty:int {willset {print ("Storeproperty will Set")} 
    Didset {print ("Storeproperty did Set"}}//can override the property observer of a computed property in the parent class override Var Computeproperty:int {
   Willset {print ("Computeproperty'll Set")} didset {print ("Computeproperty did Set")}} Override Func Dodododtest () {}} let Co = ChildofobsErver.init () Co.storeproperty = 10 

The above is a small set to introduce the Swift with final keyword to prevent rewriting, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!