Singleton Class in Swift (Global shared data)

First we have to create the empty file.

Xcode -> New -> File -> Others -> Empty file

//  GlobalData.swift

class GlobalData {

    

    var defaultLocationID : String = "0"

    var userEmailsave :String = ""

    var userLocationAdress : String = ""

    var userLocationArray : NSMutableArray!

    var userLocationSelected : String = ""

    var tokenAPI : NSString = ""

    var default_location_name : String = ""

    var userName : String = ""

    

    // Here is how you would get to it without there being a global collision of variables.

    // , or in other words, it is a globally accessable parameter that is specific to the

    // class.

    class var sharedManager: GlobalData {

        struct Static {

            static let instance = GlobalData()

        }

        return Static.instance

    }

}

//   HomeViewController.Swift

 GlobalData.sharedManager.userName = "Facebook Username or google username"

we can access the global data like this.