Measuring time differnce between closing app and opening it again.

Hi,

I am using the code below to track the time between my app closing and it re opening it again. It works just fine but I have no idea on how to use the output.

How do use the 'difference' string?

For example.

if (difference > 2 hours)
//do somethinfg

I'm clueless here.

Any help would be appreciated.

Code (CSharp):

1.      using UnityEngine;
2.      using System.Collections;
3.      using System;
4.    
5.      public class DataMaster : MonoBehaviour
6.      {
7.          DateTime currentDate;
8.          DateTime oldDate;
9.          void Start()
10.          {
11.              //Store the current time when it starts
12.              currentDate = System.DateTime.Now;
13.    
14.              //Grab the old time from the player prefs as a long
15.              long temp = Convert.ToInt64(PlayerPrefs.GetString("sysString"));
16.    
17.              //Convert the old time from binary to a DataTime variable
18.              DateTime oldDate = DateTime.FromBinary(temp);
19.              print("oldDate: " + oldDate);
20.    
21.              //Use the Subtract method and store the result as a timespan variable
22.              TimeSpan difference = currentDate.Subtract(oldDate);
23.              print("Difference: " + difference);
24.    
25.          }
26.    
27.          void OnApplicationQuit()
28.          {
29.              //Savee the current system time as a string in the player prefs class
30.              PlayerPrefs.SetString("sysString", System.DateTime.Now.ToBinary().ToString());
31.    
32.              print("Saving this date to prefs: " + System.DateTime.Now);
33.          }
34.    
35.      }

 

It's not a string first of all, it's a TimeSpan, and if you take a look at this link:
https://msdn.microsoft.com/en-us/library/system.timespan(v=vs.90).aspx
You'll see, that you can get the hours from it, by simply calling difference.TotalHours

 

Thanks pal.