Creating a basic start/top timer

Hey I'm relatively new to scripting, especially the time and math part. Basically I'm trying to add the stopwatch functionality. Where the play hits a button, and the timer starts counting up from 0 seconds. There's another button that would also pause the timer. And (if it's not too difficult) an additional button to reset the time back to 0 seconds. This going to be used for tracking a sport athletes time on the court, that's why it needs to be able to start and stop at will. I've been looking all over for something similar, but most timers I find start immediately, and aren't actually a part of the build.
This is what I have currently for starting the timer. What happens is the timer updates when I click the button, but I'm having trouble getting the desired effect of it counting up. And as far as pausing it with another button and resetting it I haven't even gotten close to figuring that out. Any help would be appreciated.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5. using TMPro;
6.  
7.  
8. public class StopwatchStart : MonoBehaviour {
9.  
10.     public Button stopWatchStart;
11.     public TMP_Text timer;
12.     private float startTime;
13.     private string minutes;
14.     private string seconds;
15.  
16.  
17.  
18.     // Use this for initialization
19.     void Start () {
20.        
21.         stopWatchStart.onClick.AddListener(StartTimer);
22.     }
23.    
24.     // Update is called once per frame
25.     void Update () {
26.        
27.         float t = Time.time - startTime;
28.         minutes = ((int)t / 60).ToString();
29.         seconds = (t % 60).ToString("f0");
30.         timer.text = minutes + ":" + seconds;
31.      
32.     }
33.     void StartTimer()
34.     {
35.         startTime = Time.time;
36.        
37.  
38.     }
39. }

 

You should use Stopwatch class to accurately measure time.

 

I just went and took a look. That seems be be using System.Diagnostics, which, if I'm not mistaken, is usable in the editor, but not when the game is built. So unfortunately I don't believe that will help. Thank you for your reply, however.

 

It is just a namespace, it has nothing to do with usability of this class.

 

Alright, so if someone stumbles upon this while trying to make a stopwatch after working all day and not being able to think properly, I did finally make one that works exactly the way I wanted, and it was a lot easier that I was making it out to be. Keep in mind in my code I'm using TextMesh Pro for the text boxes, but you could easily change that out for a standard text box. (Although TextMesh Pro is amazing.)

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using TMPro;
4. //The Goal is going to be to redo this by counting up with time.deltatime. Then doing if else statements for converting 60 seconds into
5. //one minute and sending those two to the respective number slots. Good luck, buddy
6.  
7. public class StopwatchStart : MonoBehaviour {
8.  
9.     public Button stopWatchStart;
10.     public Button stopWatchReset;
11.     public Button stopWatchStop;
12.     public TMP_Text timer;
13.     private float startTime;
14.     private float minutes;
15.     private float seconds;
16.     private bool watchGoing = false;
17.     private string secondsString;
18.     private string minutesString;
19.  
20.     // Use this for initialization
21.     void Start () {
22.         //startTime = Time.timeSinceLevelLoad;
23.         stopWatchStart.onClick.AddListener(StartTimer);
24.         stopWatchReset.onClick.AddListener(ResetTimer);
25.         stopWatchStop.onClick.AddListener(StopTimer);
26.         minutes = 00;
27.         seconds = 00;
28.     }
29.    
30.     // Update is called once per frame
31.     void Update () {
32.         timer.text = minutesString + ":" + secondsString;
33.         if (watchGoing == true)
34.         {
35.             seconds += Time.deltaTime;
36.         }
37.         if ((int)seconds == 59)
38.         {
39.             seconds = 0;
40.             minutes++;
41.         }
42.         secondsString = seconds.ToString("00");
43.         minutesString = minutes.ToString("00");
44.     }
45.     void StartTimer()
46.     {
47.         watchGoing = true;
48.         stopWatchStart.gameObject.SetActive(false);
49.         stopWatchStop.gameObject.SetActive(true);
50.     }
51.     void ResetTimer()
52.     {
53.         watchGoing = false;
54.         minutes = 00;
55.         seconds = 00;
56.         if (stopWatchStop.enabled == true)
57.         {
58.             stopWatchStop.gameObject.SetActive(false);
59.             stopWatchStart.gameObject.SetActive(true);
60.         }
61.         else
62.         {
63.             stopWatchStart.gameObject.SetActive(false);
64.             stopWatchStop.gameObject.SetActive(true);
65.         }
66.     }
67.     void StopTimer()
68.     {
69.         watchGoing = false;
70.         stopWatchStop.gameObject.SetActive(false);
71.         stopWatchStart.gameObject.SetActive(true);
72.     }
73. }
74.