Property in Swift - Computed property | Property Observers (WillSet & DidSet)

   Computed property -  Computed properties are part of a property type in Swift.  Stored properties are the most common which save and return a stored value  Computed properties calculate (rather than store) a value. A computed property provides a getter and an optional setter to indirectly access other properties and values. Computed property in swift is an interesting topic as you can write code inside a property in swift. Computed properties are provided by classes, structures, and enumerations but stored properties are provided only by classes and structures. This computed property swift tutorial has some tips on how to use the computed property in the right way and avoid the common mistakes that swift programming beginners do while computed property. Example :- Computed property A Calculate Simple Intrest struct CalculateLoan {      var amount : Int      var rate : Int      var years : Int      var simpleInterest: Int {          get {              return ( amount * rate
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Update User Info Data With Singleton Class

 

Update User Info Data With Singleton Class

Singleton Class


       


     import Foundation


        struct UserInfo {

        var firstName: String

        var lastname: String

        }


        var objUserInfo: UserInfo?


        class Singalton {


        static let shared = Singalton()

        private init(){}


        func getUserInfo() -> UserInfo? {

            return objUserInfo

        }


        func updateInfo(updatedUsetInfo: UserInfo) -> () {

            objUserInfo = updatedUsetInfo

        }

        }


        class user {

        func getUser() -> UserInfo?{

            return Singalton.shared.getUserInfo()

        }


        func updateUserInfo() -> (){

            return Singalton.shared.updateInfo(updatedUsetInfo: UserInfo(firstName: "Praveen", lastname: "Kumar"))

        }

        }


        let obj = user()

        obj.updateUserInfo()

        let data = obj.getUser()

        print(data!)






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