Serialization not working with Int

I have tried multiple example to save/load game data using serialization, yet I still facing problem with Integer.

I created a class for the game data:

Code (CSharp):

1.  
2. [Serializable]
3. class PlayerData
4. {
5.     public string sz;
6.     public int inum;
7.     public float fnum;
8. }

Data saving function:

Code (CSharp):

1. using (FileStream fs = File.OpenWrite(Application.persistentDataPath + "/angry.wn"))
2. {
3.     BinaryFormatter bf = new BinaryFormatter();
4.    
5.     PlayerData data = new PlayerData();
6.    
7.     data.sz = "12345";
8.     data.inum = 12345;
9.     data.fnum = 12345.0f;
10.     bf.Serialize(fs, data);
11. }

Data loading function:

Code (CSharp):

1. if (File.Exists(Application.persistentDataPath + "/angry.wn"))
2. {
3.     using(FileStream fs = File.OpenRead(Application.persistentDataPath + "/angry.wn"))
4.     {
5.         BinaryFormatter bf = new BinaryFormatter();
6.      
7.         PlayerData data = (PlayerData)bf.Deserialize(fs);
8.  
9.         Debug.Log(" >>> Read string:" + data.sz + " int:" + data.inum + " float:" + data.fnum);
10.  
11.     }
12.  
13. }

And this is what I get from Debug Log

>>> Read string:12345 int:57 float:12345

It just wont work with Integer and Long. Really appreciate if anyone could help me sort out the problem. Thanks.

It was developed using Unity5.0 for iOS Devices.

 

Weird case, but (in meantime)... why just not use other type that is working in your case and then parse the value ?

 

So, this isn't a solution, but something you might want to look into:
0011 0000 0011 1001 = 12345
0000 0000 0011 1001 = 57

So it seems it is either serializing ints as a single byte, or for some reason not reading the high-order byte back. No idea why -- if you don't figure it out, I'll look into it later tonight.

 

Well, I tested on Unity 4.6 building for iOS in the Editor, and everything serialized fine. Is this giving the same results for you in the editor? Or only on the device itself? If you see the behavior in the editor as well, is there any possibility you are manipulating the int prior to outputting it? i.e. accidentally bitwise-AND-ing it, doing some really strange bit-shifting, casting, etc?

 

It is working fine with the Editor.

The error just happened on the iOS devices including the iOS Simulator. I think iOS is somehow think the INT is only a byte length. The value are kept with 0-255 as you mentioned previously.

 

Have exactly the same issue.

The code below works fine under OSX.

Under iOS with scripting backend IL2CPP, the INT and DATETIME became a wrong value (value % 256, i.e. if value = 1000, the new value will be 232).
Under iOS with scripting backend Mono (2.x), everything is OK.

Here the test code. The function "Check" is based on the solution found here:
http://answers.unity3d.com/questions/753008/problem-when-saving-a-list-using-player-prefs.html

Code (csharp):

1.  
2. using UnityEngine;
3. using System;
4. using System.Collections;
5. using System.Collections.Generic;
6. using System.Runtime.Serialization.Formatters.Binary;
7. using System.IO;
8.  
9. [System.Serializable]
10. public class Item {
11.    public int score;
12.    public DateTime date;
13. }
14.  
15. public class Test : MonoBehaviour {
16.  
17.    // Use this for initialization
18.    void Start () {
19.  
20.      List<Item> before = new List<Item>();
21.      List<Item> after = new List<Item>();
22.  
23.      // Create the test value
24.      Item example = new Item ();
25.      example.score = 1000;
26.      example.date = DateTime.Now;
27.  
28.      // Insert value into list
29.      before.Add (example);
30.  
31.      // Check serialize / deserialize
32.      after = Check<List<Item>>(before);
33.  
34.      // Print
35.      Print ("before", before);  
36.      Print ("after", after);
37.  
38.    }
39.  
40.    void Print (string label, List<Item> items) {
41.      foreach (Item item in items) {
42.        Debug.Log (label + ": " + item.score.ToString () + " / " + item.date.ToString ());
43.      }    
44.    }
45.    
46.    T Check<T> (T _saveMe) {
47.      BinaryFormatter _bin = new BinaryFormatter ();
48.      MemoryStream _mem = new MemoryStream ();
49.      _bin.Serialize (_mem, _saveMe);
50.    
51.      BinaryFormatter _bin2 = new BinaryFormatter ();
52.      MemoryStream _mem2 = new MemoryStream (_mem.GetBuffer ());
53.      T _obj = (T) _bin2.Deserialize (_mem2);
54.      return _obj;
55.    }
56. }
57.  
58.  

=== OUTPUT ===

iOS with IL2CPP:

Code (csharp):

1.  
2. before: 1000 / 04/09/2015 14:34:42
3. after: 232 / 01/02/0001 01:46:11
4.  

iOS with Mono (2.x) or OSX:

Code (csharp):

1.  
2. before: 1000 / 04/09/2015 14:34:42
3. after: 1000 / 04/09/2015 14:34:42
4.  

 

Hi,

We are having the same issue with integer and date values on iOS devices (iOS 8.3) with Unity 5.0.0f4 (Backend : IL2CPP). It works fine in the Editor on OSX 10.10.3.
We checked the issue tracker but couldn't find a bug report for this.

Have any of you raised a bug or issue for this? If not we will raise a bug.

Thank you.

 

Hi,

We have submitted the Bug (Case 694713) with Unity for this.

Thank you.

 

hi,

It looks like the issue is not occurring in Unity 5.0.1f1.