如何在Swift3中从另一个类获取数据

Question

I have one swift file and in which I have kept my common function that I need every time so when I am accessing that function I am not getting value

Myfirst class

import Foundation
import UIKit

class test1
{
    var mydata = NSMutableArray()


    //MY COMMON FUNCTION

    func loadMoredata(create_at:String)->NSMutableArray
    {
        **//////My CODE**
        //getting correct data
         print(mydata)
         return mydata
    } 
}

Mysecond Class

override func viewWillAppear(_ animated: Bool)
{
        //Calling that function
        // not getting data here or empty array
        let dt:NSMutableArray = test1().loadMoredata(create_at: "0")

        // not getting data here or empty array
        print(test1().mydata)
}

Answer 1

You dont get anything back from your function since your mydata property is an instance property. Hence, every test1 object you create, will have its own mydata property with its own data.

If you want store global state you could make test1 a singleton class, where mydata is globally accessible.

class test1
{
   static let shared = test1()
   var mydata = NSMutableArray()

   private init(){}


   //MY COMMON FUNCTION

   func loadMoredata(create_at:String)->NSMutableArray
   {
       **//////My CODE**
       //getting correct data
        print(mydata)
        return mydata
   }
}